./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX --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 d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:18:29,564 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:18:29,662 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 16:18:29,668 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:18:29,669 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:18:29,702 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:18:29,702 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:18:29,703 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:18:29,704 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:18:29,704 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:18:29,705 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:18:29,705 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:18:29,706 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:18:29,707 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:18:29,708 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:18:29,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:18:29,709 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:18:29,709 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:18:29,710 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:18:29,710 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:18:29,710 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:18:29,711 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:18:29,712 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:18:29,712 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:18:29,713 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:18:29,713 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:18:29,714 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:18:29,714 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:18:29,714 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:18:29,715 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:18:29,716 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:18:29,716 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:18:29,716 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:18:29,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:18:29,717 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:18:29,718 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:18:29,718 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:18:29,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:18:29,719 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:18:29,719 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:18:29,720 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:18:29,720 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:18:29,721 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_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d [2024-11-08 16:18:30,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:18:30,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:18:30,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:18:30,122 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:18:30,123 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:18:30,125 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i Unable to find full path for "g++" [2024-11-08 16:18:32,816 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:18:33,120 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:18:33,125 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2024-11-08 16:18:33,146 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/data/5a183e424/e22e8b965c684256b1512eb06777172c/FLAG13a61f19c [2024-11-08 16:18:33,162 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/data/5a183e424/e22e8b965c684256b1512eb06777172c [2024-11-08 16:18:33,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:18:33,167 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:18:33,168 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:18:33,169 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:18:33,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:18:33,178 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:18:33" (1/1) ... [2024-11-08 16:18:33,180 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@215880bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33, skipping insertion in model container [2024-11-08 16:18:33,180 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:18:33" (1/1) ... [2024-11-08 16:18:33,246 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:18:33,816 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 16:18:33,819 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 16:18:33,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:18:33,851 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:18:33,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:18:33,982 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:18:33,983 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33 WrapperNode [2024-11-08 16:18:33,984 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:18:33,987 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:18:33,988 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:18:33,988 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:18:33,998 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33" (1/1) ... [2024-11-08 16:18:34,019 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33" (1/1) ... [2024-11-08 16:18:34,057 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2024-11-08 16:18:34,058 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:18:34,059 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:18:34,059 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:18:34,059 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:18:34,074 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33" (1/1) ... [2024-11-08 16:18:34,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33" (1/1) ... [2024-11-08 16:18:34,078 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33" (1/1) ... [2024-11-08 16:18:34,098 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [3, 6]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 6 writes are split as follows [2, 4]. [2024-11-08 16:18:34,098 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33" (1/1) ... [2024-11-08 16:18:34,099 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33" (1/1) ... [2024-11-08 16:18:34,105 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33" (1/1) ... [2024-11-08 16:18:34,110 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33" (1/1) ... [2024-11-08 16:18:34,112 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33" (1/1) ... [2024-11-08 16:18:34,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33" (1/1) ... [2024-11-08 16:18:34,117 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:18:34,118 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:18:34,119 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:18:34,119 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:18:34,120 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33" (1/1) ... [2024-11-08 16:18:34,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:18:34,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:18:34,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:18:34,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:18:34,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 16:18:34,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 16:18:34,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 16:18:34,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 16:18:34,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 16:18:34,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 16:18:34,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:18:34,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:18:34,370 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:18:34,373 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:18:34,731 INFO L? ?]: Removed 71 outVars from TransFormulas that were not future-live. [2024-11-08 16:18:34,732 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:18:34,762 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:18:34,763 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-08 16:18:34,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:18:34 BoogieIcfgContainer [2024-11-08 16:18:34,763 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:18:34,768 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:18:34,768 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:18:34,773 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:18:34,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:18:33" (1/3) ... [2024-11-08 16:18:34,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e4ac36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:18:34, skipping insertion in model container [2024-11-08 16:18:34,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:18:33" (2/3) ... [2024-11-08 16:18:34,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e4ac36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:18:34, skipping insertion in model container [2024-11-08 16:18:34,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:18:34" (3/3) ... [2024-11-08 16:18:34,782 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca-2.i [2024-11-08 16:18:34,809 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:18:34,809 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-11-08 16:18:34,864 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:18:34,873 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c2a886d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:18:34,874 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-08 16:18:34,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-08 16:18:34,893 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:34,895 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:34,896 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:34,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:34,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031114, now seen corresponding path program 1 times [2024-11-08 16:18:34,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:34,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394005] [2024-11-08 16:18:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:34,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:35,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:35,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394005] [2024-11-08 16:18:35,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394005] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:35,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:35,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:18:35,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787625409] [2024-11-08 16:18:35,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:35,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:18:35,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:35,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:18:35,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:18:35,256 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:35,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:35,346 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2024-11-08 16:18:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:18:35,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-08 16:18:35,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:35,359 INFO L225 Difference]: With dead ends: 55 [2024-11-08 16:18:35,359 INFO L226 Difference]: Without dead ends: 52 [2024-11-08 16:18:35,361 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:18:35,367 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 3 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:35,368 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 97 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:18:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-08 16:18:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-08 16:18:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.878787878787879) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-11-08 16:18:35,410 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 7 [2024-11-08 16:18:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:35,410 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-11-08 16:18:35,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-11-08 16:18:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-08 16:18:35,411 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:35,412 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:35,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:18:35,412 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:35,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:35,413 INFO L85 PathProgramCache]: Analyzing trace with hash -531914770, now seen corresponding path program 1 times [2024-11-08 16:18:35,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:35,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28372971] [2024-11-08 16:18:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:35,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:35,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:35,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28372971] [2024-11-08 16:18:35,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28372971] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:35,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:35,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:18:35,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219067827] [2024-11-08 16:18:35,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:35,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:18:35,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:18:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:18:35,611 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:35,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:35,756 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2024-11-08 16:18:35,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:18:35,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-08 16:18:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:35,759 INFO L225 Difference]: With dead ends: 55 [2024-11-08 16:18:35,759 INFO L226 Difference]: Without dead ends: 52 [2024-11-08 16:18:35,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:18:35,761 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 6 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:35,763 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 199 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:18:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-08 16:18:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-08 16:18:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2024-11-08 16:18:35,770 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 9 [2024-11-08 16:18:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:35,770 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2024-11-08 16:18:35,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2024-11-08 16:18:35,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-08 16:18:35,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:35,772 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:35,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 16:18:35,773 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:35,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:35,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1243092592, now seen corresponding path program 1 times [2024-11-08 16:18:35,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:35,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226826225] [2024-11-08 16:18:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:35,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:36,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:36,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226826225] [2024-11-08 16:18:36,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226826225] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:36,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:36,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:18:36,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704909942] [2024-11-08 16:18:36,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:36,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:18:36,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:18:36,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:18:36,013 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:36,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:36,100 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2024-11-08 16:18:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:18:36,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-08 16:18:36,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:36,103 INFO L225 Difference]: With dead ends: 50 [2024-11-08 16:18:36,103 INFO L226 Difference]: Without dead ends: 50 [2024-11-08 16:18:36,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:18:36,105 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:36,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 71 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:18:36,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-08 16:18:36,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-08 16:18:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 49 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2024-11-08 16:18:36,121 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 9 [2024-11-08 16:18:36,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:36,124 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2024-11-08 16:18:36,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:36,125 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2024-11-08 16:18:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-08 16:18:36,125 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:36,126 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:36,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 16:18:36,126 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:36,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:36,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1243092593, now seen corresponding path program 1 times [2024-11-08 16:18:36,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:36,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301687994] [2024-11-08 16:18:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:36,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:36,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:36,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301687994] [2024-11-08 16:18:36,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301687994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:36,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:36,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 16:18:36,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754498051] [2024-11-08 16:18:36,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:36,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:18:36,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:36,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:18:36,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:18:36,769 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:37,033 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2024-11-08 16:18:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:18:37,035 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-08 16:18:37,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:37,037 INFO L225 Difference]: With dead ends: 54 [2024-11-08 16:18:37,040 INFO L226 Difference]: Without dead ends: 54 [2024-11-08 16:18:37,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-08 16:18:37,042 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 30 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:37,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 207 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 16:18:37,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-08 16:18:37,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-11-08 16:18:37,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:37,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-11-08 16:18:37,058 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 9 [2024-11-08 16:18:37,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:37,059 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-11-08 16:18:37,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:37,059 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-11-08 16:18:37,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 16:18:37,060 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:37,060 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:37,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 16:18:37,061 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:37,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:37,079 INFO L85 PathProgramCache]: Analyzing trace with hash 621491755, now seen corresponding path program 1 times [2024-11-08 16:18:37,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:37,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119529805] [2024-11-08 16:18:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:37,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:37,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:37,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119529805] [2024-11-08 16:18:37,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119529805] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:37,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:37,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:18:37,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67338652] [2024-11-08 16:18:37,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:37,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:18:37,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:37,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:18:37,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:18:37,597 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:37,996 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2024-11-08 16:18:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:18:37,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-08 16:18:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:37,999 INFO L225 Difference]: With dead ends: 83 [2024-11-08 16:18:38,000 INFO L226 Difference]: Without dead ends: 83 [2024-11-08 16:18:38,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-08 16:18:38,006 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 82 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:38,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 141 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 16:18:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-08 16:18:38,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2024-11-08 16:18:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2024-11-08 16:18:38,020 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 11 [2024-11-08 16:18:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:38,021 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2024-11-08 16:18:38,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:38,021 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2024-11-08 16:18:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 16:18:38,022 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:38,022 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:38,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 16:18:38,023 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:38,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:38,024 INFO L85 PathProgramCache]: Analyzing trace with hash 621480927, now seen corresponding path program 1 times [2024-11-08 16:18:38,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:38,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10168394] [2024-11-08 16:18:38,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:38,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:38,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:38,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10168394] [2024-11-08 16:18:38,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10168394] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:38,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:38,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:18:38,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459211396] [2024-11-08 16:18:38,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:38,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:18:38,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:38,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:18:38,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:18:38,095 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:38,137 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2024-11-08 16:18:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:18:38,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-08 16:18:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:38,139 INFO L225 Difference]: With dead ends: 87 [2024-11-08 16:18:38,139 INFO L226 Difference]: Without dead ends: 87 [2024-11-08 16:18:38,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:18:38,140 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 12 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:38,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 116 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:18:38,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-08 16:18:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2024-11-08 16:18:38,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 78 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2024-11-08 16:18:38,154 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 11 [2024-11-08 16:18:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:38,154 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2024-11-08 16:18:38,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:38,155 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2024-11-08 16:18:38,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 16:18:38,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:38,156 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:38,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 16:18:38,156 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:38,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:38,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1898468179, now seen corresponding path program 1 times [2024-11-08 16:18:38,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:38,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452082216] [2024-11-08 16:18:38,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:38,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:38,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:38,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452082216] [2024-11-08 16:18:38,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452082216] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:38,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:38,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:18:38,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721515197] [2024-11-08 16:18:38,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:38,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:18:38,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:38,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:18:38,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:18:38,460 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:38,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:38,551 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2024-11-08 16:18:38,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:18:38,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-08 16:18:38,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:38,553 INFO L225 Difference]: With dead ends: 78 [2024-11-08 16:18:38,553 INFO L226 Difference]: Without dead ends: 78 [2024-11-08 16:18:38,555 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:18:38,556 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 45 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:38,557 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 78 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:18:38,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-08 16:18:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2024-11-08 16:18:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.702127659574468) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2024-11-08 16:18:38,564 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 11 [2024-11-08 16:18:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:38,565 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2024-11-08 16:18:38,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2024-11-08 16:18:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 16:18:38,566 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:38,566 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:38,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 16:18:38,567 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:38,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash -187865699, now seen corresponding path program 1 times [2024-11-08 16:18:38,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:38,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549986946] [2024-11-08 16:18:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:38,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:38,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549986946] [2024-11-08 16:18:38,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549986946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:38,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:38,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:18:38,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701139000] [2024-11-08 16:18:38,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:38,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:18:38,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:38,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:18:38,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:18:38,653 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:38,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:38,753 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2024-11-08 16:18:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:18:38,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-08 16:18:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:38,755 INFO L225 Difference]: With dead ends: 72 [2024-11-08 16:18:38,755 INFO L226 Difference]: Without dead ends: 72 [2024-11-08 16:18:38,756 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:18:38,757 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 25 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:38,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 132 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:18:38,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-08 16:18:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2024-11-08 16:18:38,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.702127659574468) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2024-11-08 16:18:38,763 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 11 [2024-11-08 16:18:38,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:38,764 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2024-11-08 16:18:38,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2024-11-08 16:18:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 16:18:38,765 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:38,765 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:38,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 16:18:38,765 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:38,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:38,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2086375223, now seen corresponding path program 1 times [2024-11-08 16:18:38,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:38,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393344440] [2024-11-08 16:18:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:38,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:38,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:38,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393344440] [2024-11-08 16:18:38,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393344440] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:38,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:38,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:18:38,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946592975] [2024-11-08 16:18:38,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:38,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:18:38,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:18:38,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:18:38,817 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:38,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:38,865 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2024-11-08 16:18:38,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:18:38,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-08 16:18:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:38,867 INFO L225 Difference]: With dead ends: 61 [2024-11-08 16:18:38,867 INFO L226 Difference]: Without dead ends: 61 [2024-11-08 16:18:38,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:18:38,868 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:38,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:18:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-08 16:18:38,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-08 16:18:38,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 60 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2024-11-08 16:18:38,874 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 12 [2024-11-08 16:18:38,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:38,875 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2024-11-08 16:18:38,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:38,875 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2024-11-08 16:18:38,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 16:18:38,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:38,876 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:38,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 16:18:38,876 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:38,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:38,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2086375224, now seen corresponding path program 1 times [2024-11-08 16:18:38,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:38,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961561321] [2024-11-08 16:18:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:38,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:39,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:39,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961561321] [2024-11-08 16:18:39,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961561321] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:39,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:39,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:18:39,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61364202] [2024-11-08 16:18:39,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:39,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:18:39,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:18:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:18:39,018 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:39,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:39,102 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2024-11-08 16:18:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:18:39,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-08 16:18:39,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:39,104 INFO L225 Difference]: With dead ends: 67 [2024-11-08 16:18:39,104 INFO L226 Difference]: Without dead ends: 67 [2024-11-08 16:18:39,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:18:39,105 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 7 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:39,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 126 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:18:39,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-08 16:18:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-11-08 16:18:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.5961538461538463) internal successors, (83), 65 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2024-11-08 16:18:39,112 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 12 [2024-11-08 16:18:39,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:39,112 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2024-11-08 16:18:39,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2024-11-08 16:18:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 16:18:39,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:39,113 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:39,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 16:18:39,114 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:39,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:39,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1528533702, now seen corresponding path program 1 times [2024-11-08 16:18:39,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:39,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970338619] [2024-11-08 16:18:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:39,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:39,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:39,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970338619] [2024-11-08 16:18:39,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970338619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:39,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:39,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:18:39,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248734768] [2024-11-08 16:18:39,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:39,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:18:39,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:39,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:18:39,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:18:39,401 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:39,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:39,559 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2024-11-08 16:18:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:18:39,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-08 16:18:39,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:39,561 INFO L225 Difference]: With dead ends: 76 [2024-11-08 16:18:39,561 INFO L226 Difference]: Without dead ends: 76 [2024-11-08 16:18:39,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:18:39,562 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 22 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:39,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 121 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:18:39,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-08 16:18:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2024-11-08 16:18:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.62) internal successors, (81), 63 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2024-11-08 16:18:39,574 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 12 [2024-11-08 16:18:39,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:39,576 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2024-11-08 16:18:39,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:39,577 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2024-11-08 16:18:39,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-08 16:18:39,577 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:39,580 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:39,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 16:18:39,581 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:39,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:39,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1169490391, now seen corresponding path program 1 times [2024-11-08 16:18:39,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:39,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086890666] [2024-11-08 16:18:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:39,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:40,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:40,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086890666] [2024-11-08 16:18:40,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086890666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:18:40,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673945549] [2024-11-08 16:18:40,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:40,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:18:40,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:18:40,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:18:40,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:18:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:40,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 16:18:40,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:18:40,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:18:40,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:18:40,590 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 10 treesize of output 8 [2024-11-08 16:18:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:40,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:18:41,381 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:18:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:41,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673945549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:18:41,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:18:41,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-08 16:18:41,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620307507] [2024-11-08 16:18:41,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:18:41,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 16:18:41,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:41,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 16:18:41,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-11-08 16:18:41,508 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:41,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:41,989 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2024-11-08 16:18:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:18:41,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-08 16:18:41,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:41,991 INFO L225 Difference]: With dead ends: 67 [2024-11-08 16:18:41,991 INFO L226 Difference]: Without dead ends: 67 [2024-11-08 16:18:41,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2024-11-08 16:18:41,992 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:41,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 312 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 16:18:41,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-08 16:18:41,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2024-11-08 16:18:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 58 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2024-11-08 16:18:42,001 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 13 [2024-11-08 16:18:42,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:42,001 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2024-11-08 16:18:42,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2024-11-08 16:18:42,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 16:18:42,003 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:42,003 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:42,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 16:18:42,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 16:18:42,204 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:42,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:42,205 INFO L85 PathProgramCache]: Analyzing trace with hash -743136773, now seen corresponding path program 1 times [2024-11-08 16:18:42,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:42,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520288318] [2024-11-08 16:18:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:42,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:42,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:42,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520288318] [2024-11-08 16:18:42,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520288318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:42,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:42,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:18:42,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872876102] [2024-11-08 16:18:42,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:42,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:18:42,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:18:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:18:42,273 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:42,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:42,347 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2024-11-08 16:18:42,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:18:42,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-08 16:18:42,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:42,348 INFO L225 Difference]: With dead ends: 57 [2024-11-08 16:18:42,348 INFO L226 Difference]: Without dead ends: 57 [2024-11-08 16:18:42,349 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:18:42,350 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 31 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:42,350 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 68 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:18:42,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-08 16:18:42,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-11-08 16:18:42,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.5) internal successors, (69), 54 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:42,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2024-11-08 16:18:42,354 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 14 [2024-11-08 16:18:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:42,354 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2024-11-08 16:18:42,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2024-11-08 16:18:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 16:18:42,355 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:42,355 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:42,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-08 16:18:42,356 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:42,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:42,356 INFO L85 PathProgramCache]: Analyzing trace with hash -743136772, now seen corresponding path program 1 times [2024-11-08 16:18:42,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:42,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044255950] [2024-11-08 16:18:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:42,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:42,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:42,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044255950] [2024-11-08 16:18:42,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044255950] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:42,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:42,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:18:42,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214331015] [2024-11-08 16:18:42,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:42,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:18:42,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:42,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:18:42,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:18:42,563 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:42,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:42,772 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2024-11-08 16:18:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:18:42,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-08 16:18:42,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:42,775 INFO L225 Difference]: With dead ends: 78 [2024-11-08 16:18:42,775 INFO L226 Difference]: Without dead ends: 78 [2024-11-08 16:18:42,775 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-08 16:18:42,776 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 59 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:42,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 110 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 16:18:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-08 16:18:42,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2024-11-08 16:18:42,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 65 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2024-11-08 16:18:42,782 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 14 [2024-11-08 16:18:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:42,783 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2024-11-08 16:18:42,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2024-11-08 16:18:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 16:18:42,786 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:42,787 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:42,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-08 16:18:42,787 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:42,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:42,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1669738582, now seen corresponding path program 1 times [2024-11-08 16:18:42,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:42,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161761220] [2024-11-08 16:18:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:42,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:43,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:43,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161761220] [2024-11-08 16:18:43,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161761220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:18:43,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100600470] [2024-11-08 16:18:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:43,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:18:43,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:18:43,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:18:43,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:18:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:43,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 16:18:43,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:18:43,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:18:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:43,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:18:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:43,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100600470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:18:43,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:18:43,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-08 16:18:43,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456791421] [2024-11-08 16:18:43,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:18:43,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 16:18:43,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:43,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 16:18:43,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-11-08 16:18:43,972 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:44,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:44,750 INFO L93 Difference]: Finished difference Result 121 states and 162 transitions. [2024-11-08 16:18:44,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 16:18:44,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-08 16:18:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:44,752 INFO L225 Difference]: With dead ends: 121 [2024-11-08 16:18:44,752 INFO L226 Difference]: Without dead ends: 121 [2024-11-08 16:18:44,754 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2024-11-08 16:18:44,755 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 81 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:44,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 172 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 16:18:44,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-08 16:18:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2024-11-08 16:18:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 85 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 114 transitions. [2024-11-08 16:18:44,764 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 114 transitions. Word has length 15 [2024-11-08 16:18:44,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:44,765 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 114 transitions. [2024-11-08 16:18:44,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:44,765 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 114 transitions. [2024-11-08 16:18:44,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 16:18:44,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:44,766 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:44,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 16:18:44,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 16:18:44,967 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:44,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:44,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1189866219, now seen corresponding path program 1 times [2024-11-08 16:18:44,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:44,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965712943] [2024-11-08 16:18:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:44,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:45,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:45,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965712943] [2024-11-08 16:18:45,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965712943] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:18:45,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080833920] [2024-11-08 16:18:45,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:45,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:18:45,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:18:45,457 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:18:45,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 16:18:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:45,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 16:18:45,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:18:45,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 16:18:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:45,787 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:18:45,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080833920] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:45,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:18:45,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2024-11-08 16:18:45,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453792566] [2024-11-08 16:18:45,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:45,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 16:18:45,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:45,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 16:18:45,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:18:45,793 INFO L87 Difference]: Start difference. First operand 86 states and 114 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:46,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:46,039 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2024-11-08 16:18:46,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 16:18:46,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-08 16:18:46,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:46,041 INFO L225 Difference]: With dead ends: 110 [2024-11-08 16:18:46,041 INFO L226 Difference]: Without dead ends: 110 [2024-11-08 16:18:46,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2024-11-08 16:18:46,043 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 44 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:46,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 183 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 16:18:46,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-08 16:18:46,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2024-11-08 16:18:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.4482758620689655) internal successors, (126), 95 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2024-11-08 16:18:46,048 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 16 [2024-11-08 16:18:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:46,048 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2024-11-08 16:18:46,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:46,049 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2024-11-08 16:18:46,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 16:18:46,049 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:46,049 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:46,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 16:18:46,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 16:18:46,251 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:46,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:46,251 INFO L85 PathProgramCache]: Analyzing trace with hash 222624130, now seen corresponding path program 1 times [2024-11-08 16:18:46,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:46,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625761193] [2024-11-08 16:18:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:46,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:18:46,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:46,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625761193] [2024-11-08 16:18:46,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625761193] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:46,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:46,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:18:46,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575860113] [2024-11-08 16:18:46,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:46,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:18:46,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:46,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:18:46,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:18:46,505 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:46,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:46,580 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2024-11-08 16:18:46,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:18:46,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-08 16:18:46,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:46,582 INFO L225 Difference]: With dead ends: 107 [2024-11-08 16:18:46,582 INFO L226 Difference]: Without dead ends: 107 [2024-11-08 16:18:46,582 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:18:46,583 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:46,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 82 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:18:46,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-08 16:18:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2024-11-08 16:18:46,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 98 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 132 transitions. [2024-11-08 16:18:46,589 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 132 transitions. Word has length 16 [2024-11-08 16:18:46,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:46,589 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 132 transitions. [2024-11-08 16:18:46,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:46,591 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 132 transitions. [2024-11-08 16:18:46,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 16:18:46,592 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:46,592 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:46,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-08 16:18:46,593 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:46,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:46,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1000181980, now seen corresponding path program 1 times [2024-11-08 16:18:46,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:46,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282106612] [2024-11-08 16:18:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:46,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:46,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:46,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282106612] [2024-11-08 16:18:46,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282106612] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:46,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:46,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:18:46,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959124064] [2024-11-08 16:18:46,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:46,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:18:46,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:46,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:18:46,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:18:46,699 INFO L87 Difference]: Start difference. First operand 99 states and 132 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:46,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:46,776 INFO L93 Difference]: Finished difference Result 98 states and 130 transitions. [2024-11-08 16:18:46,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:18:46,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-08 16:18:46,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:46,778 INFO L225 Difference]: With dead ends: 98 [2024-11-08 16:18:46,778 INFO L226 Difference]: Without dead ends: 98 [2024-11-08 16:18:46,778 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:18:46,779 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 32 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:46,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 100 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:18:46,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-08 16:18:46,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-11-08 16:18:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 90 states have (on average 1.4444444444444444) internal successors, (130), 97 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2024-11-08 16:18:46,784 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 18 [2024-11-08 16:18:46,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:46,785 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2024-11-08 16:18:46,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:46,785 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2024-11-08 16:18:46,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 16:18:46,786 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:46,786 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:46,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-08 16:18:46,787 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:46,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:46,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1000181979, now seen corresponding path program 1 times [2024-11-08 16:18:46,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:46,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280915787] [2024-11-08 16:18:46,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:46,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:47,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:47,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280915787] [2024-11-08 16:18:47,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280915787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:47,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:47,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 16:18:47,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395004629] [2024-11-08 16:18:47,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:47,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:18:47,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:47,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:18:47,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:18:47,066 INFO L87 Difference]: Start difference. First operand 98 states and 130 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:47,249 INFO L93 Difference]: Finished difference Result 116 states and 153 transitions. [2024-11-08 16:18:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:18:47,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-08 16:18:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:47,251 INFO L225 Difference]: With dead ends: 116 [2024-11-08 16:18:47,251 INFO L226 Difference]: Without dead ends: 116 [2024-11-08 16:18:47,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-08 16:18:47,252 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:47,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 125 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 16:18:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-08 16:18:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 103. [2024-11-08 16:18:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 95 states have (on average 1.4421052631578948) internal successors, (137), 102 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2024-11-08 16:18:47,256 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 18 [2024-11-08 16:18:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:47,257 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2024-11-08 16:18:47,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2024-11-08 16:18:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 16:18:47,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:47,258 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:47,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-08 16:18:47,259 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:47,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:47,259 INFO L85 PathProgramCache]: Analyzing trace with hash -436760995, now seen corresponding path program 1 times [2024-11-08 16:18:47,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:47,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553369364] [2024-11-08 16:18:47,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:47,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:47,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:47,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553369364] [2024-11-08 16:18:47,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553369364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:18:47,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404990603] [2024-11-08 16:18:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:47,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:18:47,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:18:47,572 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:18:47,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 16:18:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:47,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-08 16:18:47,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:18:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:47,863 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:18:47,974 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 23 treesize of output 19 [2024-11-08 16:18:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:48,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404990603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:18:48,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:18:48,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-08 16:18:48,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825008429] [2024-11-08 16:18:48,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:18:48,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 16:18:48,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:48,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 16:18:48,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-08 16:18:48,103 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:48,494 INFO L93 Difference]: Finished difference Result 143 states and 188 transitions. [2024-11-08 16:18:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:18:48,494 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-08 16:18:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:48,496 INFO L225 Difference]: With dead ends: 143 [2024-11-08 16:18:48,497 INFO L226 Difference]: Without dead ends: 143 [2024-11-08 16:18:48,497 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-08 16:18:48,498 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 74 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:48,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 394 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 16:18:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-08 16:18:48,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 110. [2024-11-08 16:18:48,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 103 states have (on average 1.4174757281553398) internal successors, (146), 109 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 146 transitions. [2024-11-08 16:18:48,508 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 146 transitions. Word has length 20 [2024-11-08 16:18:48,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:48,508 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 146 transitions. [2024-11-08 16:18:48,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:48,509 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 146 transitions. [2024-11-08 16:18:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 16:18:48,509 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:48,510 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:48,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 16:18:48,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:18:48,715 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:48,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:48,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1532018442, now seen corresponding path program 1 times [2024-11-08 16:18:48,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:48,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460507614] [2024-11-08 16:18:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:48,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:49,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:49,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460507614] [2024-11-08 16:18:49,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460507614] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:18:49,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134924469] [2024-11-08 16:18:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:49,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:18:49,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:18:49,178 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:18:49,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 16:18:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:49,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 16:18:49,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:18:49,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:18:49,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 16:18:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:49,683 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:18:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:50,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134924469] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:18:50,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:18:50,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-11-08 16:18:50,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472259822] [2024-11-08 16:18:50,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:18:50,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 16:18:50,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:50,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 16:18:50,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2024-11-08 16:18:50,087 INFO L87 Difference]: Start difference. First operand 110 states and 146 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:50,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:50,923 INFO L93 Difference]: Finished difference Result 141 states and 185 transitions. [2024-11-08 16:18:50,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 16:18:50,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-08 16:18:50,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:50,924 INFO L225 Difference]: With dead ends: 141 [2024-11-08 16:18:50,924 INFO L226 Difference]: Without dead ends: 141 [2024-11-08 16:18:50,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2024-11-08 16:18:50,926 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 73 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:50,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 160 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 16:18:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-08 16:18:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2024-11-08 16:18:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 106 states have (on average 1.4245283018867925) internal successors, (151), 112 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 151 transitions. [2024-11-08 16:18:50,931 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 151 transitions. Word has length 20 [2024-11-08 16:18:50,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:50,931 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 151 transitions. [2024-11-08 16:18:50,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 151 transitions. [2024-11-08 16:18:50,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 16:18:50,933 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:50,933 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:50,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 16:18:51,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:18:51,134 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:51,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:51,134 INFO L85 PathProgramCache]: Analyzing trace with hash -238545712, now seen corresponding path program 1 times [2024-11-08 16:18:51,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:51,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724654988] [2024-11-08 16:18:51,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:51,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:51,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:51,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724654988] [2024-11-08 16:18:51,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724654988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:51,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:51,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:18:51,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816749549] [2024-11-08 16:18:51,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:51,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:18:51,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:18:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:18:51,185 INFO L87 Difference]: Start difference. First operand 113 states and 151 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:51,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:51,200 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2024-11-08 16:18:51,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:18:51,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 16:18:51,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:51,202 INFO L225 Difference]: With dead ends: 110 [2024-11-08 16:18:51,202 INFO L226 Difference]: Without dead ends: 110 [2024-11-08 16:18:51,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:18:51,205 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:51,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:18:51,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-08 16:18:51,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2024-11-08 16:18:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 101 states have (on average 1.396039603960396) internal successors, (141), 107 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 141 transitions. [2024-11-08 16:18:51,210 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 141 transitions. Word has length 22 [2024-11-08 16:18:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:51,210 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 141 transitions. [2024-11-08 16:18:51,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 141 transitions. [2024-11-08 16:18:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 16:18:51,211 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:51,211 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:51,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-08 16:18:51,212 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:51,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:51,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1179479350, now seen corresponding path program 2 times [2024-11-08 16:18:51,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:51,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434731345] [2024-11-08 16:18:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:51,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:51,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:51,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434731345] [2024-11-08 16:18:51,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434731345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:18:51,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799685514] [2024-11-08 16:18:51,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:18:51,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:18:51,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:18:51,830 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:18:51,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 16:18:51,952 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:18:51,952 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:18:51,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-08 16:18:51,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:18:52,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:18:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:52,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:18:52,217 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 16 [2024-11-08 16:18:52,221 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 20 treesize of output 16 [2024-11-08 16:18:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:52,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799685514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:18:52,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:18:52,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 20 [2024-11-08 16:18:52,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398732581] [2024-11-08 16:18:52,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:18:52,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 16:18:52,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:52,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 16:18:52,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2024-11-08 16:18:52,342 INFO L87 Difference]: Start difference. First operand 108 states and 141 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:53,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:53,458 INFO L93 Difference]: Finished difference Result 323 states and 417 transitions. [2024-11-08 16:18:53,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-08 16:18:53,459 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 16:18:53,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:53,461 INFO L225 Difference]: With dead ends: 323 [2024-11-08 16:18:53,461 INFO L226 Difference]: Without dead ends: 323 [2024-11-08 16:18:53,462 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2024-11-08 16:18:53,462 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 206 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:53,463 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 903 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 16:18:53,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-08 16:18:53,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 213. [2024-11-08 16:18:53,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 206 states have (on average 1.3980582524271845) internal successors, (288), 212 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:53,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 288 transitions. [2024-11-08 16:18:53,471 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 288 transitions. Word has length 22 [2024-11-08 16:18:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:53,472 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 288 transitions. [2024-11-08 16:18:53,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:53,472 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 288 transitions. [2024-11-08 16:18:53,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-08 16:18:53,473 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:53,473 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:53,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 16:18:53,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-08 16:18:53,678 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:53,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:53,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1158970407, now seen corresponding path program 1 times [2024-11-08 16:18:53,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:53,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628407271] [2024-11-08 16:18:53,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:53,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:53,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:53,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628407271] [2024-11-08 16:18:53,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628407271] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:53,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:53,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:18:53,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924572636] [2024-11-08 16:18:53,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:53,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:18:53,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:53,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:18:53,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:18:53,766 INFO L87 Difference]: Start difference. First operand 213 states and 288 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:53,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:53,821 INFO L93 Difference]: Finished difference Result 224 states and 299 transitions. [2024-11-08 16:18:53,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:18:53,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-08 16:18:53,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:53,823 INFO L225 Difference]: With dead ends: 224 [2024-11-08 16:18:53,824 INFO L226 Difference]: Without dead ends: 224 [2024-11-08 16:18:53,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:18:53,825 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 25 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:53,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 132 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:18:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-08 16:18:53,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 213. [2024-11-08 16:18:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 206 states have (on average 1.383495145631068) internal successors, (285), 212 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 285 transitions. [2024-11-08 16:18:53,833 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 285 transitions. Word has length 23 [2024-11-08 16:18:53,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:53,833 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 285 transitions. [2024-11-08 16:18:53,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 285 transitions. [2024-11-08 16:18:53,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-08 16:18:53,835 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:53,836 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:53,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-08 16:18:53,836 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:53,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:53,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1591333754, now seen corresponding path program 1 times [2024-11-08 16:18:53,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:53,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503106288] [2024-11-08 16:18:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:54,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:54,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503106288] [2024-11-08 16:18:54,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503106288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:18:54,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511419239] [2024-11-08 16:18:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:54,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:18:54,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:18:54,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:18:54,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 16:18:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:54,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 16:18:54,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:18:54,577 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 7 [2024-11-08 16:18:54,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:18:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:55,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:18:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:55,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511419239] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:18:55,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:18:55,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2024-11-08 16:18:55,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513207126] [2024-11-08 16:18:55,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:18:55,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 16:18:55,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:55,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 16:18:55,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2024-11-08 16:18:55,627 INFO L87 Difference]: Start difference. First operand 213 states and 285 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:56,341 INFO L93 Difference]: Finished difference Result 387 states and 529 transitions. [2024-11-08 16:18:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 16:18:56,341 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-08 16:18:56,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:56,343 INFO L225 Difference]: With dead ends: 387 [2024-11-08 16:18:56,343 INFO L226 Difference]: Without dead ends: 387 [2024-11-08 16:18:56,344 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2024-11-08 16:18:56,344 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 83 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:56,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 147 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 16:18:56,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-11-08 16:18:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 281. [2024-11-08 16:18:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 274 states have (on average 1.4197080291970803) internal successors, (389), 280 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:56,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 389 transitions. [2024-11-08 16:18:56,359 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 389 transitions. Word has length 23 [2024-11-08 16:18:56,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:56,359 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 389 transitions. [2024-11-08 16:18:56,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:56,359 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 389 transitions. [2024-11-08 16:18:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 16:18:56,360 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:56,360 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:56,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 16:18:56,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-08 16:18:56,566 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:56,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:56,567 INFO L85 PathProgramCache]: Analyzing trace with hash 552543863, now seen corresponding path program 1 times [2024-11-08 16:18:56,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:56,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028582908] [2024-11-08 16:18:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:56,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:56,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:56,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028582908] [2024-11-08 16:18:56,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028582908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:18:56,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550295281] [2024-11-08 16:18:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:56,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:18:56,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:18:56,651 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:18:56,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 16:18:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:56,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 16:18:56,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:18:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:56,772 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:18:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:56,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550295281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:18:56,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:18:56,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-11-08 16:18:56,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258166237] [2024-11-08 16:18:56,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:18:56,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:18:56,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:56,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:18:56,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:18:56,800 INFO L87 Difference]: Start difference. First operand 281 states and 389 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:56,864 INFO L93 Difference]: Finished difference Result 326 states and 436 transitions. [2024-11-08 16:18:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 16:18:56,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-08 16:18:56,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:56,865 INFO L225 Difference]: With dead ends: 326 [2024-11-08 16:18:56,865 INFO L226 Difference]: Without dead ends: 326 [2024-11-08 16:18:56,866 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:18:56,866 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 30 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:56,867 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 213 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:18:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-08 16:18:56,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 301. [2024-11-08 16:18:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 294 states have (on average 1.3979591836734695) internal successors, (411), 300 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 411 transitions. [2024-11-08 16:18:56,873 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 411 transitions. Word has length 24 [2024-11-08 16:18:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:56,873 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 411 transitions. [2024-11-08 16:18:56,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 411 transitions. [2024-11-08 16:18:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 16:18:56,874 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:56,874 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:56,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 16:18:57,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-08 16:18:57,079 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:57,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:57,080 INFO L85 PathProgramCache]: Analyzing trace with hash -265104587, now seen corresponding path program 1 times [2024-11-08 16:18:57,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:57,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636471022] [2024-11-08 16:18:57,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:57,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:57,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:57,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636471022] [2024-11-08 16:18:57,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636471022] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:57,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:57,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-08 16:18:57,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916473363] [2024-11-08 16:18:57,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:57,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 16:18:57,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:57,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 16:18:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-08 16:18:57,287 INFO L87 Difference]: Start difference. First operand 301 states and 411 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:57,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:57,368 INFO L93 Difference]: Finished difference Result 376 states and 494 transitions. [2024-11-08 16:18:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 16:18:57,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-08 16:18:57,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:57,370 INFO L225 Difference]: With dead ends: 376 [2024-11-08 16:18:57,370 INFO L226 Difference]: Without dead ends: 376 [2024-11-08 16:18:57,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-08 16:18:57,371 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:57,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 288 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:18:57,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2024-11-08 16:18:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 333. [2024-11-08 16:18:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 326 states have (on average 1.3742331288343559) internal successors, (448), 332 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 448 transitions. [2024-11-08 16:18:57,378 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 448 transitions. Word has length 24 [2024-11-08 16:18:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:57,378 INFO L471 AbstractCegarLoop]: Abstraction has 333 states and 448 transitions. [2024-11-08 16:18:57,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 448 transitions. [2024-11-08 16:18:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 16:18:57,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:57,380 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:57,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-08 16:18:57,380 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:57,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:57,380 INFO L85 PathProgramCache]: Analyzing trace with hash 157597239, now seen corresponding path program 1 times [2024-11-08 16:18:57,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:57,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770032032] [2024-11-08 16:18:57,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:57,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:57,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:57,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770032032] [2024-11-08 16:18:57,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770032032] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:57,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:57,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-08 16:18:57,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622195912] [2024-11-08 16:18:57,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:57,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 16:18:57,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:57,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 16:18:57,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-08 16:18:57,618 INFO L87 Difference]: Start difference. First operand 333 states and 448 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:57,763 INFO L93 Difference]: Finished difference Result 355 states and 470 transitions. [2024-11-08 16:18:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:18:57,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-08 16:18:57,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:57,764 INFO L225 Difference]: With dead ends: 355 [2024-11-08 16:18:57,765 INFO L226 Difference]: Without dead ends: 355 [2024-11-08 16:18:57,765 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-08 16:18:57,766 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:57,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 219 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:18:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2024-11-08 16:18:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 319. [2024-11-08 16:18:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 312 states have (on average 1.391025641025641) internal successors, (434), 318 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 434 transitions. [2024-11-08 16:18:57,773 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 434 transitions. Word has length 24 [2024-11-08 16:18:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:57,773 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 434 transitions. [2024-11-08 16:18:57,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:57,774 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 434 transitions. [2024-11-08 16:18:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 16:18:57,774 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:57,774 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:57,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-08 16:18:57,775 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:57,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:57,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1617338544, now seen corresponding path program 1 times [2024-11-08 16:18:57,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:57,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458194616] [2024-11-08 16:18:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:57,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:57,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:57,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458194616] [2024-11-08 16:18:57,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458194616] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:18:57,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:18:57,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:18:57,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935425724] [2024-11-08 16:18:57,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:18:57,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:18:57,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:57,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:18:57,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:18:57,910 INFO L87 Difference]: Start difference. First operand 319 states and 434 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:57,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:57,944 INFO L93 Difference]: Finished difference Result 318 states and 433 transitions. [2024-11-08 16:18:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:18:57,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-08 16:18:57,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:57,945 INFO L225 Difference]: With dead ends: 318 [2024-11-08 16:18:57,946 INFO L226 Difference]: Without dead ends: 266 [2024-11-08 16:18:57,946 INFO L431 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 [2024-11-08 16:18:57,947 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:57,947 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 72 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:18:57,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-11-08 16:18:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2024-11-08 16:18:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 260 states have (on average 1.3384615384615384) internal successors, (348), 265 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 348 transitions. [2024-11-08 16:18:57,953 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 348 transitions. Word has length 26 [2024-11-08 16:18:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:57,953 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 348 transitions. [2024-11-08 16:18:57,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:57,953 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 348 transitions. [2024-11-08 16:18:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 16:18:57,954 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:57,954 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:57,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-08 16:18:57,954 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:57,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:57,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1128380996, now seen corresponding path program 1 times [2024-11-08 16:18:57,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:57,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095682705] [2024-11-08 16:18:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:57,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:58,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:18:58,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095682705] [2024-11-08 16:18:58,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095682705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:18:58,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584258534] [2024-11-08 16:18:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:58,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:18:58,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:18:58,239 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:18:58,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 16:18:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:18:58,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-08 16:18:58,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:18:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:58,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:18:58,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-08 16:18:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:18:58,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584258534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:18:58,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:18:58,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-08 16:18:58,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077316462] [2024-11-08 16:18:58,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:18:58,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 16:18:58,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:58,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 16:18:58,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-08 16:18:58,745 INFO L87 Difference]: Start difference. First operand 266 states and 348 transitions. Second operand has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:59,156 INFO L93 Difference]: Finished difference Result 325 states and 412 transitions. [2024-11-08 16:18:59,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:18:59,157 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-08 16:18:59,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:59,158 INFO L225 Difference]: With dead ends: 325 [2024-11-08 16:18:59,158 INFO L226 Difference]: Without dead ends: 323 [2024-11-08 16:18:59,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-11-08 16:18:59,160 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 70 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:59,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 387 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 16:18:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-08 16:18:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 274. [2024-11-08 16:18:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 268 states have (on average 1.3395522388059702) internal successors, (359), 273 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 359 transitions. [2024-11-08 16:18:59,167 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 359 transitions. Word has length 26 [2024-11-08 16:18:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:59,168 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 359 transitions. [2024-11-08 16:18:59,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 359 transitions. [2024-11-08 16:18:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-08 16:18:59,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:59,169 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:18:59,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 16:18:59,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:18:59,373 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:18:59,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:59,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1838159746, now seen corresponding path program 2 times [2024-11-08 16:18:59,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:59,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122293048] [2024-11-08 16:18:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:59,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:00,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:00,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122293048] [2024-11-08 16:19:00,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122293048] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:00,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620984785] [2024-11-08 16:19:00,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:19:00,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:00,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:00,005 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:00,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 16:19:00,126 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 16:19:00,126 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:00,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 16:19:00,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:00,168 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 7 [2024-11-08 16:19:00,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:19:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 16:19:00,552 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:19:00,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620984785] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:19:00,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:19:00,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2024-11-08 16:19:00,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290180374] [2024-11-08 16:19:00,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:19:00,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:19:00,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:00,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:19:00,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2024-11-08 16:19:00,556 INFO L87 Difference]: Start difference. First operand 274 states and 359 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:00,679 INFO L93 Difference]: Finished difference Result 273 states and 351 transitions. [2024-11-08 16:19:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:19:00,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-08 16:19:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:00,684 INFO L225 Difference]: With dead ends: 273 [2024-11-08 16:19:00,685 INFO L226 Difference]: Without dead ends: 261 [2024-11-08 16:19:00,686 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2024-11-08 16:19:00,687 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:00,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 73 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:19:00,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-08 16:19:00,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 208. [2024-11-08 16:19:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.2660098522167487) internal successors, (257), 207 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 257 transitions. [2024-11-08 16:19:00,696 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 257 transitions. Word has length 27 [2024-11-08 16:19:00,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:00,697 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 257 transitions. [2024-11-08 16:19:00,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 257 transitions. [2024-11-08 16:19:00,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-08 16:19:00,698 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:00,698 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:00,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 16:19:00,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-08 16:19:00,899 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:00,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:00,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1908364521, now seen corresponding path program 3 times [2024-11-08 16:19:00,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:00,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34163280] [2024-11-08 16:19:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:00,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:01,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:01,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34163280] [2024-11-08 16:19:01,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34163280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:01,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252884891] [2024-11-08 16:19:01,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:19:01,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:01,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:01,460 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:01,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 16:19:01,585 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 16:19:01,585 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:01,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-08 16:19:01,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:01,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:19:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:01,975 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:02,005 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 16 [2024-11-08 16:19:02,009 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 20 treesize of output 16 [2024-11-08 16:19:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:02,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252884891] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:02,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:02,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 23 [2024-11-08 16:19:02,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962355346] [2024-11-08 16:19:02,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:02,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 16:19:02,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:02,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 16:19:02,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2024-11-08 16:19:02,153 INFO L87 Difference]: Start difference. First operand 208 states and 257 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:03,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:03,888 INFO L93 Difference]: Finished difference Result 337 states and 388 transitions. [2024-11-08 16:19:03,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-08 16:19:03,889 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-08 16:19:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:03,890 INFO L225 Difference]: With dead ends: 337 [2024-11-08 16:19:03,890 INFO L226 Difference]: Without dead ends: 282 [2024-11-08 16:19:03,891 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 16:19:03,892 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 155 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:03,893 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 872 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 16:19:03,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-11-08 16:19:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 234. [2024-11-08 16:19:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.222707423580786) internal successors, (280), 233 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2024-11-08 16:19:03,900 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 28 [2024-11-08 16:19:03,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:03,900 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2024-11-08 16:19:03,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:03,901 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2024-11-08 16:19:03,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-08 16:19:03,901 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:03,902 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:03,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 16:19:04,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:04,102 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:04,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:04,103 INFO L85 PathProgramCache]: Analyzing trace with hash -957575297, now seen corresponding path program 1 times [2024-11-08 16:19:04,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:04,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282846743] [2024-11-08 16:19:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:04,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:19:04,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:04,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282846743] [2024-11-08 16:19:04,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282846743] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:19:04,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:19:04,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-08 16:19:04,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295224971] [2024-11-08 16:19:04,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:19:04,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 16:19:04,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:04,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 16:19:04,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-08 16:19:04,468 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:04,598 INFO L93 Difference]: Finished difference Result 329 states and 386 transitions. [2024-11-08 16:19:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:19:04,599 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-08 16:19:04,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:04,600 INFO L225 Difference]: With dead ends: 329 [2024-11-08 16:19:04,601 INFO L226 Difference]: Without dead ends: 283 [2024-11-08 16:19:04,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-08 16:19:04,602 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:04,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 181 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:19:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-11-08 16:19:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 239. [2024-11-08 16:19:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.2179487179487178) internal successors, (285), 238 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:04,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 285 transitions. [2024-11-08 16:19:04,608 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 285 transitions. Word has length 28 [2024-11-08 16:19:04,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:04,609 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 285 transitions. [2024-11-08 16:19:04,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:04,609 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 285 transitions. [2024-11-08 16:19:04,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-08 16:19:04,610 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:04,610 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:04,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-08 16:19:04,611 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:04,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1664255773, now seen corresponding path program 2 times [2024-11-08 16:19:04,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:04,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448324632] [2024-11-08 16:19:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:04,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:05,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:05,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448324632] [2024-11-08 16:19:05,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448324632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:05,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471717535] [2024-11-08 16:19:05,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:19:05,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:05,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:05,021 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:05,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 16:19:05,173 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:19:05,174 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:05,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-08 16:19:05,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:05,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:05,644 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 23 treesize of output 19 [2024-11-08 16:19:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:05,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471717535] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:05,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:05,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2024-11-08 16:19:05,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703022334] [2024-11-08 16:19:05,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:05,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 16:19:05,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:05,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 16:19:05,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-11-08 16:19:05,880 INFO L87 Difference]: Start difference. First operand 239 states and 285 transitions. Second operand has 26 states, 25 states have (on average 3.24) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:06,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:06,476 INFO L93 Difference]: Finished difference Result 298 states and 347 transitions. [2024-11-08 16:19:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 16:19:06,477 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.24) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-08 16:19:06,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:06,478 INFO L225 Difference]: With dead ends: 298 [2024-11-08 16:19:06,478 INFO L226 Difference]: Without dead ends: 296 [2024-11-08 16:19:06,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2024-11-08 16:19:06,479 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 73 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:06,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 545 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 16:19:06,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2024-11-08 16:19:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 230. [2024-11-08 16:19:06,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.231111111111111) internal successors, (277), 229 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:06,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 277 transitions. [2024-11-08 16:19:06,487 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 277 transitions. Word has length 32 [2024-11-08 16:19:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:06,487 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 277 transitions. [2024-11-08 16:19:06,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.24) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:06,488 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 277 transitions. [2024-11-08 16:19:06,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-08 16:19:06,489 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:06,489 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:06,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 16:19:06,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:06,693 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:06,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:06,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1442570210, now seen corresponding path program 2 times [2024-11-08 16:19:06,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:06,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026155873] [2024-11-08 16:19:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:06,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 16:19:07,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:07,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026155873] [2024-11-08 16:19:07,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026155873] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:19:07,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:19:07,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 16:19:07,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432359942] [2024-11-08 16:19:07,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:19:07,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:19:07,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:07,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:19:07,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:19:07,015 INFO L87 Difference]: Start difference. First operand 230 states and 277 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:07,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:07,070 INFO L93 Difference]: Finished difference Result 229 states and 275 transitions. [2024-11-08 16:19:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 16:19:07,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-08 16:19:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:07,072 INFO L225 Difference]: With dead ends: 229 [2024-11-08 16:19:07,072 INFO L226 Difference]: Without dead ends: 229 [2024-11-08 16:19:07,072 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:19:07,073 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:07,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 68 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:19:07,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-08 16:19:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 202. [2024-11-08 16:19:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 198 states have (on average 1.202020202020202) internal successors, (238), 201 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 238 transitions. [2024-11-08 16:19:07,079 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 238 transitions. Word has length 32 [2024-11-08 16:19:07,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:07,079 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 238 transitions. [2024-11-08 16:19:07,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 238 transitions. [2024-11-08 16:19:07,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-08 16:19:07,080 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:07,081 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:07,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-08 16:19:07,081 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:07,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:07,082 INFO L85 PathProgramCache]: Analyzing trace with hash -810337785, now seen corresponding path program 1 times [2024-11-08 16:19:07,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:07,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310467810] [2024-11-08 16:19:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:07,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:19:07,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:07,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310467810] [2024-11-08 16:19:07,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310467810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:07,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042356486] [2024-11-08 16:19:07,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:07,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:07,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:07,424 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:07,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 16:19:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:07,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 16:19:07,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:19:07,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:07,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-08 16:19:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:19:08,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042356486] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:08,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:08,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-11-08 16:19:08,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957174973] [2024-11-08 16:19:08,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:08,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 16:19:08,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:08,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 16:19:08,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-11-08 16:19:08,022 INFO L87 Difference]: Start difference. First operand 202 states and 238 transitions. Second operand has 21 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:08,282 INFO L93 Difference]: Finished difference Result 239 states and 271 transitions. [2024-11-08 16:19:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 16:19:08,283 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-08 16:19:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:08,284 INFO L225 Difference]: With dead ends: 239 [2024-11-08 16:19:08,285 INFO L226 Difference]: Without dead ends: 239 [2024-11-08 16:19:08,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-08 16:19:08,286 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:08,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 216 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 16:19:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-08 16:19:08,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 220. [2024-11-08 16:19:08,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 216 states have (on average 1.1759259259259258) internal successors, (254), 219 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:08,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 254 transitions. [2024-11-08 16:19:08,293 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 254 transitions. Word has length 32 [2024-11-08 16:19:08,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:08,293 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 254 transitions. [2024-11-08 16:19:08,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 254 transitions. [2024-11-08 16:19:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-08 16:19:08,294 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:08,295 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:08,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-08 16:19:08,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:08,496 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:08,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:08,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1599332024, now seen corresponding path program 4 times [2024-11-08 16:19:08,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:08,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903099195] [2024-11-08 16:19:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:08,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:09,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:09,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903099195] [2024-11-08 16:19:09,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903099195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:09,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666530575] [2024-11-08 16:19:09,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:19:09,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:09,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:09,263 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:09,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 16:19:09,437 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:19:09,438 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:09,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-08 16:19:09,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:09,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:19:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:09,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:09,844 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 16 [2024-11-08 16:19:09,847 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 20 treesize of output 16 [2024-11-08 16:19:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:09,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666530575] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:09,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:09,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 27 [2024-11-08 16:19:09,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915389252] [2024-11-08 16:19:09,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:09,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 16:19:09,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 16:19:09,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2024-11-08 16:19:09,993 INFO L87 Difference]: Start difference. First operand 220 states and 254 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:11,950 INFO L93 Difference]: Finished difference Result 406 states and 452 transitions. [2024-11-08 16:19:11,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-08 16:19:11,950 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-08 16:19:11,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:11,952 INFO L225 Difference]: With dead ends: 406 [2024-11-08 16:19:11,952 INFO L226 Difference]: Without dead ends: 345 [2024-11-08 16:19:11,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2024-11-08 16:19:11,953 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 153 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:11,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1219 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 16:19:11,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2024-11-08 16:19:11,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 266. [2024-11-08 16:19:11,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 262 states have (on average 1.1564885496183206) internal successors, (303), 265 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 303 transitions. [2024-11-08 16:19:11,961 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 303 transitions. Word has length 34 [2024-11-08 16:19:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:11,962 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 303 transitions. [2024-11-08 16:19:11,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 303 transitions. [2024-11-08 16:19:11,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-08 16:19:11,963 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:11,963 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:11,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-08 16:19:12,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-08 16:19:12,168 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:12,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:12,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1753612738, now seen corresponding path program 1 times [2024-11-08 16:19:12,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:12,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574092864] [2024-11-08 16:19:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:12,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:19:12,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:12,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574092864] [2024-11-08 16:19:12,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574092864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:12,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599654654] [2024-11-08 16:19:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:12,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:12,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:12,870 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:12,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 16:19:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:13,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-08 16:19:13,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:13,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:19:13,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:19:13,107 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 10 treesize of output 8 [2024-11-08 16:19:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:19:13,733 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:14,374 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:19:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:19:14,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599654654] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:14,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:14,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2024-11-08 16:19:14,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195969899] [2024-11-08 16:19:14,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:14,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-08 16:19:14,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:14,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-08 16:19:14,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 16:19:14,520 INFO L87 Difference]: Start difference. First operand 266 states and 303 transitions. Second operand has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:15,267 INFO L93 Difference]: Finished difference Result 367 states and 410 transitions. [2024-11-08 16:19:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 16:19:15,268 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-08 16:19:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:15,269 INFO L225 Difference]: With dead ends: 367 [2024-11-08 16:19:15,269 INFO L226 Difference]: Without dead ends: 363 [2024-11-08 16:19:15,270 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=287, Invalid=1519, Unknown=0, NotChecked=0, Total=1806 [2024-11-08 16:19:15,270 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 83 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:15,270 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 233 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 16:19:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-11-08 16:19:15,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 296. [2024-11-08 16:19:15,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 292 states have (on average 1.1575342465753424) internal successors, (338), 295 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 338 transitions. [2024-11-08 16:19:15,278 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 338 transitions. Word has length 35 [2024-11-08 16:19:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:15,279 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 338 transitions. [2024-11-08 16:19:15,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 338 transitions. [2024-11-08 16:19:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 16:19:15,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:15,280 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:15,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-08 16:19:15,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:15,481 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:15,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:15,482 INFO L85 PathProgramCache]: Analyzing trace with hash 332799550, now seen corresponding path program 3 times [2024-11-08 16:19:15,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:15,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172139856] [2024-11-08 16:19:15,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:15,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:15,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:15,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172139856] [2024-11-08 16:19:15,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172139856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:15,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118267358] [2024-11-08 16:19:15,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:19:15,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:15,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:15,966 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:15,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 16:19:16,141 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-08 16:19:16,141 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:16,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-08 16:19:16,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:16,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:16,749 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 8 treesize of output 6 [2024-11-08 16:19:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:16,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118267358] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:16,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:16,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2024-11-08 16:19:16,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323365622] [2024-11-08 16:19:16,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:16,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 16:19:16,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 16:19:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2024-11-08 16:19:16,870 INFO L87 Difference]: Start difference. First operand 296 states and 338 transitions. Second operand has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:17,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:17,529 INFO L93 Difference]: Finished difference Result 386 states and 432 transitions. [2024-11-08 16:19:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 16:19:17,529 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-08 16:19:17,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:17,530 INFO L225 Difference]: With dead ends: 386 [2024-11-08 16:19:17,531 INFO L226 Difference]: Without dead ends: 384 [2024-11-08 16:19:17,531 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 16:19:17,532 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 143 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:17,532 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 780 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 16:19:17,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2024-11-08 16:19:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 291. [2024-11-08 16:19:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 287 states have (on average 1.1637630662020906) internal successors, (334), 290 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 334 transitions. [2024-11-08 16:19:17,540 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 334 transitions. Word has length 38 [2024-11-08 16:19:17,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:17,541 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 334 transitions. [2024-11-08 16:19:17,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 334 transitions. [2024-11-08 16:19:17,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 16:19:17,542 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:17,542 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:17,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-08 16:19:17,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-08 16:19:17,743 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:17,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:17,743 INFO L85 PathProgramCache]: Analyzing trace with hash -834617383, now seen corresponding path program 2 times [2024-11-08 16:19:17,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:17,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12802166] [2024-11-08 16:19:17,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:17,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:18,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:18,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12802166] [2024-11-08 16:19:18,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12802166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:18,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490768235] [2024-11-08 16:19:18,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:19:18,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:18,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:18,676 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:18,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 16:19:18,871 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:19:18,872 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:18,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-08 16:19:18,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:19,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:19:19,516 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:19:19,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:19:19,520 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 17 treesize of output 10 [2024-11-08 16:19:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:19,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:19,792 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 15 treesize of output 13 [2024-11-08 16:19:19,798 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 24 treesize of output 20 [2024-11-08 16:19:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:20,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490768235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:20,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:20,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2024-11-08 16:19:20,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191981802] [2024-11-08 16:19:20,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:20,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-08 16:19:20,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:20,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-08 16:19:20,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 16:19:20,196 INFO L87 Difference]: Start difference. First operand 291 states and 334 transitions. Second operand has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:21,014 INFO L93 Difference]: Finished difference Result 325 states and 363 transitions. [2024-11-08 16:19:21,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-08 16:19:21,015 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-08 16:19:21,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:21,016 INFO L225 Difference]: With dead ends: 325 [2024-11-08 16:19:21,016 INFO L226 Difference]: Without dead ends: 248 [2024-11-08 16:19:21,017 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2024-11-08 16:19:21,018 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:21,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 458 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 16:19:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-08 16:19:21,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2024-11-08 16:19:21,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 244 states have (on average 1.1598360655737705) internal successors, (283), 247 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:21,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 283 transitions. [2024-11-08 16:19:21,025 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 283 transitions. Word has length 38 [2024-11-08 16:19:21,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:21,025 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 283 transitions. [2024-11-08 16:19:21,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 283 transitions. [2024-11-08 16:19:21,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 16:19:21,027 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:21,027 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:21,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-08 16:19:21,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-08 16:19:21,231 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:21,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:21,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1907812327, now seen corresponding path program 5 times [2024-11-08 16:19:21,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:21,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210039398] [2024-11-08 16:19:21,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:21,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:22,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:22,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210039398] [2024-11-08 16:19:22,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210039398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:22,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721682320] [2024-11-08 16:19:22,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:19:22,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:22,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:22,161 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:22,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-08 16:19:22,345 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-08 16:19:22,346 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:22,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-08 16:19:22,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:22,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:19:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:22,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:22,994 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 16 [2024-11-08 16:19:22,996 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 20 treesize of output 16 [2024-11-08 16:19:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:23,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721682320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:23,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:23,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 31 [2024-11-08 16:19:23,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162548259] [2024-11-08 16:19:23,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:23,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-08 16:19:23,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:23,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-08 16:19:23,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2024-11-08 16:19:23,139 INFO L87 Difference]: Start difference. First operand 248 states and 283 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:25,590 INFO L93 Difference]: Finished difference Result 471 states and 520 transitions. [2024-11-08 16:19:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-08 16:19:25,591 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-08 16:19:25,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:25,592 INFO L225 Difference]: With dead ends: 471 [2024-11-08 16:19:25,593 INFO L226 Difference]: Without dead ends: 404 [2024-11-08 16:19:25,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=226, Invalid=2744, Unknown=0, NotChecked=0, Total=2970 [2024-11-08 16:19:25,595 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 155 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:25,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1671 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-08 16:19:25,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-11-08 16:19:25,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 305. [2024-11-08 16:19:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 301 states have (on average 1.1461794019933556) internal successors, (345), 304 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 345 transitions. [2024-11-08 16:19:25,604 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 345 transitions. Word has length 40 [2024-11-08 16:19:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:25,604 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 345 transitions. [2024-11-08 16:19:25,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:25,605 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 345 transitions. [2024-11-08 16:19:25,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 16:19:25,605 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:25,606 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:25,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-08 16:19:25,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-08 16:19:25,807 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:25,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:25,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1014228681, now seen corresponding path program 1 times [2024-11-08 16:19:25,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:25,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154838772] [2024-11-08 16:19:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:25,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:19:26,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:26,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154838772] [2024-11-08 16:19:26,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154838772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:26,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721693052] [2024-11-08 16:19:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:26,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:26,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:26,567 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:26,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-08 16:19:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:26,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-08 16:19:26,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:26,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:19:26,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:19:26,808 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 10 treesize of output 8 [2024-11-08 16:19:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:19:27,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:19:29,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721693052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:29,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:29,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 34 [2024-11-08 16:19:29,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398920416] [2024-11-08 16:19:29,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:29,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-08 16:19:29,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:29,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-08 16:19:29,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2024-11-08 16:19:29,060 INFO L87 Difference]: Start difference. First operand 305 states and 345 transitions. Second operand has 35 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 35 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:30,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:30,522 INFO L93 Difference]: Finished difference Result 430 states and 476 transitions. [2024-11-08 16:19:30,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-08 16:19:30,522 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 35 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-08 16:19:30,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:30,524 INFO L225 Difference]: With dead ends: 430 [2024-11-08 16:19:30,524 INFO L226 Difference]: Without dead ends: 422 [2024-11-08 16:19:30,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=342, Invalid=2208, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 16:19:30,526 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 185 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:30,526 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 406 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 16:19:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2024-11-08 16:19:30,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 339. [2024-11-08 16:19:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 335 states have (on average 1.146268656716418) internal successors, (384), 338 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 384 transitions. [2024-11-08 16:19:30,536 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 384 transitions. Word has length 41 [2024-11-08 16:19:30,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:30,536 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 384 transitions. [2024-11-08 16:19:30,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 35 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:30,537 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 384 transitions. [2024-11-08 16:19:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 16:19:30,538 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:30,538 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:30,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-08 16:19:30,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:30,742 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:30,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:30,743 INFO L85 PathProgramCache]: Analyzing trace with hash 989639457, now seen corresponding path program 3 times [2024-11-08 16:19:30,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:30,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121353899] [2024-11-08 16:19:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:30,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:19:31,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:31,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121353899] [2024-11-08 16:19:31,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121353899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:31,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288446102] [2024-11-08 16:19:31,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:19:31,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:31,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:31,324 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:31,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-08 16:19:31,542 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 16:19:31,542 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:31,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-08 16:19:31,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:31,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 16:19:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:19:31,818 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:31,913 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 15 treesize of output 13 [2024-11-08 16:19:31,919 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 16 treesize of output 12 [2024-11-08 16:19:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:19:32,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288446102] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:32,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:32,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 26 [2024-11-08 16:19:32,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055108579] [2024-11-08 16:19:32,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:32,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 16:19:32,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:32,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 16:19:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2024-11-08 16:19:32,045 INFO L87 Difference]: Start difference. First operand 339 states and 384 transitions. Second operand has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:32,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:32,402 INFO L93 Difference]: Finished difference Result 531 states and 595 transitions. [2024-11-08 16:19:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 16:19:32,403 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-08 16:19:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:32,405 INFO L225 Difference]: With dead ends: 531 [2024-11-08 16:19:32,405 INFO L226 Difference]: Without dead ends: 449 [2024-11-08 16:19:32,406 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-11-08 16:19:32,406 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:32,408 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 333 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 16:19:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2024-11-08 16:19:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 395. [2024-11-08 16:19:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 391 states have (on average 1.1406649616368287) internal successors, (446), 394 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:32,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 446 transitions. [2024-11-08 16:19:32,419 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 446 transitions. Word has length 42 [2024-11-08 16:19:32,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:32,420 INFO L471 AbstractCegarLoop]: Abstraction has 395 states and 446 transitions. [2024-11-08 16:19:32,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 446 transitions. [2024-11-08 16:19:32,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-08 16:19:32,423 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:32,424 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:32,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-08 16:19:32,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:32,629 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:32,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:32,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1302127841, now seen corresponding path program 4 times [2024-11-08 16:19:32,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:32,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530772864] [2024-11-08 16:19:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:32,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:33,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:33,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530772864] [2024-11-08 16:19:33,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530772864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:33,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903072848] [2024-11-08 16:19:33,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:19:33,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:33,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:33,202 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:33,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-08 16:19:33,435 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:19:33,435 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:33,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-08 16:19:33,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:33,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:34,152 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 23 treesize of output 19 [2024-11-08 16:19:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:34,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903072848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:34,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:34,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2024-11-08 16:19:34,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147582947] [2024-11-08 16:19:34,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:34,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-08 16:19:34,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-08 16:19:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2024-11-08 16:19:34,468 INFO L87 Difference]: Start difference. First operand 395 states and 446 transitions. Second operand has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 36 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:35,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:35,457 INFO L93 Difference]: Finished difference Result 531 states and 589 transitions. [2024-11-08 16:19:35,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 16:19:35,458 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 36 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-08 16:19:35,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:35,460 INFO L225 Difference]: With dead ends: 531 [2024-11-08 16:19:35,460 INFO L226 Difference]: Without dead ends: 519 [2024-11-08 16:19:35,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 16:19:35,461 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 87 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:35,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 981 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 16:19:35,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2024-11-08 16:19:35,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 386. [2024-11-08 16:19:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 382 states have (on average 1.1465968586387434) internal successors, (438), 385 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 438 transitions. [2024-11-08 16:19:35,472 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 438 transitions. Word has length 44 [2024-11-08 16:19:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:35,473 INFO L471 AbstractCegarLoop]: Abstraction has 386 states and 438 transitions. [2024-11-08 16:19:35,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 36 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 438 transitions. [2024-11-08 16:19:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 16:19:35,474 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:35,475 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:35,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-08 16:19:35,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-08 16:19:35,680 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:35,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:35,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1757518022, now seen corresponding path program 6 times [2024-11-08 16:19:35,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:35,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411276650] [2024-11-08 16:19:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:35,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:36,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:36,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411276650] [2024-11-08 16:19:36,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411276650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:36,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568054731] [2024-11-08 16:19:36,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:19:36,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:36,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:36,740 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:36,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-08 16:19:36,964 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-08 16:19:36,964 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:36,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-08 16:19:36,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:37,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:19:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:37,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:37,683 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 16 [2024-11-08 16:19:37,687 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 20 treesize of output 16 [2024-11-08 16:19:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:37,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568054731] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:37,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:37,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 35 [2024-11-08 16:19:37,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894956106] [2024-11-08 16:19:37,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:37,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-08 16:19:37,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:37,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-08 16:19:37,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2024-11-08 16:19:37,868 INFO L87 Difference]: Start difference. First operand 386 states and 438 transitions. Second operand has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 35 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:40,653 INFO L93 Difference]: Finished difference Result 662 states and 730 transitions. [2024-11-08 16:19:40,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-08 16:19:40,654 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 35 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-08 16:19:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:40,656 INFO L225 Difference]: With dead ends: 662 [2024-11-08 16:19:40,656 INFO L226 Difference]: Without dead ends: 589 [2024-11-08 16:19:40,657 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=262, Invalid=3520, Unknown=0, NotChecked=0, Total=3782 [2024-11-08 16:19:40,658 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 165 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 2111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:40,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1890 Invalid, 2111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-08 16:19:40,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2024-11-08 16:19:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 462. [2024-11-08 16:19:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 458 states have (on average 1.1419213973799127) internal successors, (523), 461 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 523 transitions. [2024-11-08 16:19:40,671 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 523 transitions. Word has length 46 [2024-11-08 16:19:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:40,671 INFO L471 AbstractCegarLoop]: Abstraction has 462 states and 523 transitions. [2024-11-08 16:19:40,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 35 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 523 transitions. [2024-11-08 16:19:40,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 16:19:40,673 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:40,673 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:40,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-08 16:19:40,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-08 16:19:40,874 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:40,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:40,875 INFO L85 PathProgramCache]: Analyzing trace with hash 188411817, now seen corresponding path program 4 times [2024-11-08 16:19:40,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:40,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243975588] [2024-11-08 16:19:40,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:40,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:19:41,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:41,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243975588] [2024-11-08 16:19:41,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243975588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:41,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317716437] [2024-11-08 16:19:41,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:19:41,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:41,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:41,406 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:41,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-08 16:19:41,617 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:19:41,617 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:41,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-08 16:19:41,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:19:41,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:42,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-08 16:19:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:19:42,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317716437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:42,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:42,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2024-11-08 16:19:42,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491179969] [2024-11-08 16:19:42,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:42,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 16:19:42,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:42,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 16:19:42,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-11-08 16:19:42,143 INFO L87 Difference]: Start difference. First operand 462 states and 523 transitions. Second operand has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:42,620 INFO L93 Difference]: Finished difference Result 576 states and 638 transitions. [2024-11-08 16:19:42,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 16:19:42,621 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-08 16:19:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:42,623 INFO L225 Difference]: With dead ends: 576 [2024-11-08 16:19:42,623 INFO L226 Difference]: Without dead ends: 576 [2024-11-08 16:19:42,623 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-11-08 16:19:42,624 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:42,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 450 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 16:19:42,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2024-11-08 16:19:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 487. [2024-11-08 16:19:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 483 states have (on average 1.1325051759834368) internal successors, (547), 486 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 547 transitions. [2024-11-08 16:19:42,636 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 547 transitions. Word has length 46 [2024-11-08 16:19:42,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:42,636 INFO L471 AbstractCegarLoop]: Abstraction has 487 states and 547 transitions. [2024-11-08 16:19:42,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:42,637 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 547 transitions. [2024-11-08 16:19:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-08 16:19:42,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:42,639 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:42,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-08 16:19:42,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-08 16:19:42,844 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:42,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:42,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1327658244, now seen corresponding path program 2 times [2024-11-08 16:19:42,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:42,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543040622] [2024-11-08 16:19:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:42,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:19:43,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:43,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543040622] [2024-11-08 16:19:43,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543040622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:43,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454729223] [2024-11-08 16:19:43,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:19:43,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:43,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:43,619 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:43,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-08 16:19:43,820 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:19:43,821 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:43,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-08 16:19:43,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:43,895 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 10 treesize of output 8 [2024-11-08 16:19:43,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:19:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:19:45,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:46,397 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:19:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:19:46,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454729223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:46,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:46,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 17] total 44 [2024-11-08 16:19:46,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173322725] [2024-11-08 16:19:46,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:46,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-08 16:19:46,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:46,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-08 16:19:46,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2024-11-08 16:19:46,523 INFO L87 Difference]: Start difference. First operand 487 states and 547 transitions. Second operand has 45 states, 44 states have (on average 3.159090909090909) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:48,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:48,962 INFO L93 Difference]: Finished difference Result 717 states and 780 transitions. [2024-11-08 16:19:48,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-08 16:19:48,963 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.159090909090909) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-08 16:19:48,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:48,964 INFO L225 Difference]: With dead ends: 717 [2024-11-08 16:19:48,964 INFO L226 Difference]: Without dead ends: 689 [2024-11-08 16:19:48,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=559, Invalid=3473, Unknown=0, NotChecked=0, Total=4032 [2024-11-08 16:19:48,965 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 244 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:48,966 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 839 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1894 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-08 16:19:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2024-11-08 16:19:48,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 485. [2024-11-08 16:19:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 481 states have (on average 1.1288981288981288) internal successors, (543), 484 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 543 transitions. [2024-11-08 16:19:48,978 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 543 transitions. Word has length 47 [2024-11-08 16:19:48,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:48,978 INFO L471 AbstractCegarLoop]: Abstraction has 485 states and 543 transitions. [2024-11-08 16:19:48,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.159090909090909) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:48,979 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 543 transitions. [2024-11-08 16:19:48,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 16:19:48,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:48,980 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:49,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-08 16:19:49,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-08 16:19:49,182 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:49,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:49,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1343255104, now seen corresponding path program 5 times [2024-11-08 16:19:49,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:49,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155599723] [2024-11-08 16:19:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:49,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:49,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:49,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155599723] [2024-11-08 16:19:49,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155599723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:49,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074684662] [2024-11-08 16:19:49,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:19:49,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:49,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:49,887 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:49,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-08 16:19:50,109 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-08 16:19:50,109 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:50,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-08 16:19:50,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:50,491 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:50,761 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 23 treesize of output 19 [2024-11-08 16:19:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:51,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074684662] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:51,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:51,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2024-11-08 16:19:51,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037232579] [2024-11-08 16:19:51,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:51,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-08 16:19:51,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-08 16:19:51,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2024-11-08 16:19:51,070 INFO L87 Difference]: Start difference. First operand 485 states and 543 transitions. Second operand has 41 states, 40 states have (on average 3.225) internal successors, (129), 41 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:52,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:52,046 INFO L93 Difference]: Finished difference Result 654 states and 719 transitions. [2024-11-08 16:19:52,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 16:19:52,046 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.225) internal successors, (129), 41 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-08 16:19:52,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:52,048 INFO L225 Difference]: With dead ends: 654 [2024-11-08 16:19:52,048 INFO L226 Difference]: Without dead ends: 642 [2024-11-08 16:19:52,049 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2024-11-08 16:19:52,049 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 145 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:52,049 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1105 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1530 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 16:19:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2024-11-08 16:19:52,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 478. [2024-11-08 16:19:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 474 states have (on average 1.1329113924050633) internal successors, (537), 477 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:52,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 537 transitions. [2024-11-08 16:19:52,060 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 537 transitions. Word has length 50 [2024-11-08 16:19:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:52,060 INFO L471 AbstractCegarLoop]: Abstraction has 478 states and 537 transitions. [2024-11-08 16:19:52,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.225) internal successors, (129), 41 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:52,060 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 537 transitions. [2024-11-08 16:19:52,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-08 16:19:52,062 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:52,062 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:52,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-08 16:19:52,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-08 16:19:52,263 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:52,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:52,263 INFO L85 PathProgramCache]: Analyzing trace with hash 968315875, now seen corresponding path program 3 times [2024-11-08 16:19:52,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:52,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903991108] [2024-11-08 16:19:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:52,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:19:53,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:53,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903991108] [2024-11-08 16:19:53,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903991108] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:53,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606054820] [2024-11-08 16:19:53,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:19:53,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:53,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:53,302 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:53,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-08 16:19:53,502 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 16:19:53,502 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:53,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-08 16:19:53,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:53,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:19:53,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:19:53,581 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 10 treesize of output 8 [2024-11-08 16:19:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:19:54,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:55,543 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:19:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:19:55,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606054820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:55,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:55,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 18] total 49 [2024-11-08 16:19:55,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012897719] [2024-11-08 16:19:55,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:55,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-08 16:19:55,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:55,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-08 16:19:55,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2111, Unknown=0, NotChecked=0, Total=2450 [2024-11-08 16:19:55,687 INFO L87 Difference]: Start difference. First operand 478 states and 537 transitions. Second operand has 50 states, 49 states have (on average 2.836734693877551) internal successors, (139), 50 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:19:57,618 INFO L93 Difference]: Finished difference Result 666 states and 729 transitions. [2024-11-08 16:19:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-08 16:19:57,618 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.836734693877551) internal successors, (139), 50 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-08 16:19:57,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:19:57,619 INFO L225 Difference]: With dead ends: 666 [2024-11-08 16:19:57,619 INFO L226 Difference]: Without dead ends: 664 [2024-11-08 16:19:57,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=899, Invalid=5263, Unknown=0, NotChecked=0, Total=6162 [2024-11-08 16:19:57,622 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 241 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:19:57,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 405 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 16:19:57,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2024-11-08 16:19:57,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 479. [2024-11-08 16:19:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 475 states have (on average 1.1368421052631579) internal successors, (540), 478 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:57,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 540 transitions. [2024-11-08 16:19:57,627 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 540 transitions. Word has length 51 [2024-11-08 16:19:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:19:57,627 INFO L471 AbstractCegarLoop]: Abstraction has 479 states and 540 transitions. [2024-11-08 16:19:57,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.836734693877551) internal successors, (139), 50 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:19:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 540 transitions. [2024-11-08 16:19:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-08 16:19:57,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:19:57,629 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:19:57,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-08 16:19:57,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-08 16:19:57,833 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:19:57,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:19:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash -22160357, now seen corresponding path program 7 times [2024-11-08 16:19:57,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:19:57,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477817114] [2024-11-08 16:19:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:19:57,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:19:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:58,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:58,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477817114] [2024-11-08 16:19:58,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477817114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:58,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874363637] [2024-11-08 16:19:58,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:19:58,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:58,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:58,713 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:58,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-08 16:19:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:58,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-08 16:19:58,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:59,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:19:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:59,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:19:59,580 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 16 [2024-11-08 16:19:59,583 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 20 treesize of output 16 [2024-11-08 16:19:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:19:59,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874363637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:19:59,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:19:59,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 39 [2024-11-08 16:19:59,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204573075] [2024-11-08 16:19:59,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:19:59,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-08 16:19:59,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:19:59,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-08 16:19:59,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 16:19:59,721 INFO L87 Difference]: Start difference. First operand 479 states and 540 transitions. Second operand has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:02,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:20:02,804 INFO L93 Difference]: Finished difference Result 824 states and 904 transitions. [2024-11-08 16:20:02,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-08 16:20:02,805 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-08 16:20:02,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:20:02,806 INFO L225 Difference]: With dead ends: 824 [2024-11-08 16:20:02,806 INFO L226 Difference]: Without dead ends: 745 [2024-11-08 16:20:02,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=311, Invalid=4659, Unknown=0, NotChecked=0, Total=4970 [2024-11-08 16:20:02,808 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 188 mSDsluCounter, 2006 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 2089 SdHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:20:02,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 2089 Invalid, 2507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-08 16:20:02,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2024-11-08 16:20:02,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 559. [2024-11-08 16:20:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 555 states have (on average 1.1333333333333333) internal successors, (629), 558 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 629 transitions. [2024-11-08 16:20:02,818 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 629 transitions. Word has length 52 [2024-11-08 16:20:02,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:20:02,818 INFO L471 AbstractCegarLoop]: Abstraction has 559 states and 629 transitions. [2024-11-08 16:20:02,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:02,819 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 629 transitions. [2024-11-08 16:20:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-08 16:20:02,820 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:20:02,820 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:20:02,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-08 16:20:03,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-08 16:20:03,021 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:20:03,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:20:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1243493371, now seen corresponding path program 5 times [2024-11-08 16:20:03,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:20:03,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989306259] [2024-11-08 16:20:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:20:03,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:20:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:20:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:04,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:20:04,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989306259] [2024-11-08 16:20:04,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989306259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:20:04,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845688398] [2024-11-08 16:20:04,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:20:04,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:04,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:20:04,019 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:20:04,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-08 16:20:04,224 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-08 16:20:04,224 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:20:04,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-08 16:20:04,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:20:04,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:20:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:04,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:20:04,612 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 15 treesize of output 13 [2024-11-08 16:20:04,615 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 16 treesize of output 12 [2024-11-08 16:20:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:04,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845688398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:20:04,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:20:04,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 33 [2024-11-08 16:20:04,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604337789] [2024-11-08 16:20:04,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:20:04,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-08 16:20:04,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:20:04,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-08 16:20:04,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 16:20:04,877 INFO L87 Difference]: Start difference. First operand 559 states and 629 transitions. Second operand has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:20:05,458 INFO L93 Difference]: Finished difference Result 619 states and 686 transitions. [2024-11-08 16:20:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-08 16:20:05,459 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-08 16:20:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:20:05,461 INFO L225 Difference]: With dead ends: 619 [2024-11-08 16:20:05,461 INFO L226 Difference]: Without dead ends: 545 [2024-11-08 16:20:05,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2024-11-08 16:20:05,461 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 59 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:20:05,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 407 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 16:20:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2024-11-08 16:20:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 539. [2024-11-08 16:20:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 535 states have (on average 1.1308411214953271) internal successors, (605), 538 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 605 transitions. [2024-11-08 16:20:05,469 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 605 transitions. Word has length 52 [2024-11-08 16:20:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:20:05,469 INFO L471 AbstractCegarLoop]: Abstraction has 539 states and 605 transitions. [2024-11-08 16:20:05,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:05,469 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 605 transitions. [2024-11-08 16:20:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-08 16:20:05,470 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:20:05,471 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:20:05,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-08 16:20:05,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:05,671 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:20:05,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:20:05,672 INFO L85 PathProgramCache]: Analyzing trace with hash -408468293, now seen corresponding path program 4 times [2024-11-08 16:20:05,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:20:05,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082676435] [2024-11-08 16:20:05,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:20:05,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:20:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:20:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:20:06,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:20:06,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082676435] [2024-11-08 16:20:06,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082676435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:20:06,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905292524] [2024-11-08 16:20:06,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:20:06,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:06,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:20:06,517 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:20:06,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-08 16:20:06,736 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:20:06,736 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:20:06,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-08 16:20:06,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:20:06,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:20:06,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:20:06,800 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 10 treesize of output 8 [2024-11-08 16:20:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:20:08,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:20:09,249 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:20:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:20:09,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905292524] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:20:09,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:20:09,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 46 [2024-11-08 16:20:09,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254113418] [2024-11-08 16:20:09,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:20:09,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-08 16:20:09,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:20:09,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-08 16:20:09,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1885, Unknown=0, NotChecked=0, Total=2162 [2024-11-08 16:20:09,394 INFO L87 Difference]: Start difference. First operand 539 states and 605 transitions. Second operand has 47 states, 46 states have (on average 3.4130434782608696) internal successors, (157), 47 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:20:11,517 INFO L93 Difference]: Finished difference Result 821 states and 895 transitions. [2024-11-08 16:20:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-08 16:20:11,518 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.4130434782608696) internal successors, (157), 47 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-08 16:20:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:20:11,520 INFO L225 Difference]: With dead ends: 821 [2024-11-08 16:20:11,520 INFO L226 Difference]: Without dead ends: 791 [2024-11-08 16:20:11,520 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=492, Invalid=3168, Unknown=0, NotChecked=0, Total=3660 [2024-11-08 16:20:11,521 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 173 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:20:11,521 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 903 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-08 16:20:11,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2024-11-08 16:20:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 547. [2024-11-08 16:20:11,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 543 states have (on average 1.1289134438305708) internal successors, (613), 546 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:11,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 613 transitions. [2024-11-08 16:20:11,530 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 613 transitions. Word has length 53 [2024-11-08 16:20:11,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:20:11,530 INFO L471 AbstractCegarLoop]: Abstraction has 547 states and 613 transitions. [2024-11-08 16:20:11,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.4130434782608696) internal successors, (157), 47 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:11,531 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 613 transitions. [2024-11-08 16:20:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-08 16:20:11,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:20:11,532 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:20:11,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-08 16:20:11,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:11,733 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:20:11,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:20:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash -336755167, now seen corresponding path program 6 times [2024-11-08 16:20:11,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:20:11,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260271152] [2024-11-08 16:20:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:20:11,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:20:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:20:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:12,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:20:12,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260271152] [2024-11-08 16:20:12,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260271152] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:20:12,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727317622] [2024-11-08 16:20:12,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:20:12,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:12,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:20:12,542 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:20:12,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-08 16:20:12,846 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-08 16:20:12,846 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:20:12,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-08 16:20:12,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:20:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 72 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:13,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:20:13,876 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 8 treesize of output 6 [2024-11-08 16:20:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 72 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:14,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727317622] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:20:14,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:20:14,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 46 [2024-11-08 16:20:14,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768259374] [2024-11-08 16:20:14,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:20:14,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-08 16:20:14,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:20:14,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-08 16:20:14,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2024-11-08 16:20:14,071 INFO L87 Difference]: Start difference. First operand 547 states and 613 transitions. Second operand has 47 states, 46 states have (on average 2.717391304347826) internal successors, (125), 47 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:14,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:20:14,883 INFO L93 Difference]: Finished difference Result 761 states and 837 transitions. [2024-11-08 16:20:14,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-08 16:20:14,883 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.717391304347826) internal successors, (125), 47 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-11-08 16:20:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:20:14,884 INFO L225 Difference]: With dead ends: 761 [2024-11-08 16:20:14,885 INFO L226 Difference]: Without dead ends: 749 [2024-11-08 16:20:14,885 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2024-11-08 16:20:14,885 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 194 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:20:14,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1170 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1646 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 16:20:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2024-11-08 16:20:14,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 536. [2024-11-08 16:20:14,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 532 states have (on average 1.1334586466165413) internal successors, (603), 535 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 603 transitions. [2024-11-08 16:20:14,894 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 603 transitions. Word has length 56 [2024-11-08 16:20:14,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:20:14,895 INFO L471 AbstractCegarLoop]: Abstraction has 536 states and 603 transitions. [2024-11-08 16:20:14,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.717391304347826) internal successors, (125), 47 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 603 transitions. [2024-11-08 16:20:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-08 16:20:14,896 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:20:14,896 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:20:14,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-08 16:20:15,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:15,097 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:20:15,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:20:15,097 INFO L85 PathProgramCache]: Analyzing trace with hash -550844093, now seen corresponding path program 6 times [2024-11-08 16:20:15,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:20:15,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659811476] [2024-11-08 16:20:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:20:15,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:20:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:20:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:15,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:20:15,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659811476] [2024-11-08 16:20:15,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659811476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:20:15,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186876109] [2024-11-08 16:20:15,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:20:15,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:15,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:20:15,902 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:20:15,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-08 16:20:16,149 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-08 16:20:16,149 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:20:16,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-08 16:20:16,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:20:16,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:20:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:20:16,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:20:16,372 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 15 treesize of output 13 [2024-11-08 16:20:16,374 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 16 treesize of output 12 [2024-11-08 16:20:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:20:16,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186876109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:20:16,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:20:16,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 28 [2024-11-08 16:20:16,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718705917] [2024-11-08 16:20:16,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:20:16,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 16:20:16,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:20:16,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 16:20:16,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2024-11-08 16:20:16,443 INFO L87 Difference]: Start difference. First operand 536 states and 603 transitions. Second operand has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:20:17,094 INFO L93 Difference]: Finished difference Result 923 states and 1026 transitions. [2024-11-08 16:20:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-08 16:20:17,094 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-11-08 16:20:17,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:20:17,096 INFO L225 Difference]: With dead ends: 923 [2024-11-08 16:20:17,096 INFO L226 Difference]: Without dead ends: 773 [2024-11-08 16:20:17,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 16:20:17,097 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:20:17,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 708 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 16:20:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2024-11-08 16:20:17,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 639. [2024-11-08 16:20:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 635 states have (on average 1.1291338582677166) internal successors, (717), 638 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:17,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 717 transitions. [2024-11-08 16:20:17,110 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 717 transitions. Word has length 56 [2024-11-08 16:20:17,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:20:17,110 INFO L471 AbstractCegarLoop]: Abstraction has 639 states and 717 transitions. [2024-11-08 16:20:17,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:17,111 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 717 transitions. [2024-11-08 16:20:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-08 16:20:17,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:20:17,113 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:20:17,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-08 16:20:17,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:17,314 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:20:17,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:20:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1919780540, now seen corresponding path program 8 times [2024-11-08 16:20:17,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:20:17,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928307568] [2024-11-08 16:20:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:20:17,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:20:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:20:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:18,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:20:18,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928307568] [2024-11-08 16:20:18,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928307568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:20:18,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263984516] [2024-11-08 16:20:18,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:20:18,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:18,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:20:18,569 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:20:18,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-08 16:20:18,814 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:20:18,814 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:20:18,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-08 16:20:18,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:20:19,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:20:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 8 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:19,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:20:19,677 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 16 [2024-11-08 16:20:19,679 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 20 treesize of output 16 [2024-11-08 16:20:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 8 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:19,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263984516] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:20:19,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:20:19,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 43 [2024-11-08 16:20:19,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654808387] [2024-11-08 16:20:19,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:20:19,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-08 16:20:19,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:20:19,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-08 16:20:19,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1698, Unknown=0, NotChecked=0, Total=1806 [2024-11-08 16:20:19,874 INFO L87 Difference]: Start difference. First operand 639 states and 717 transitions. Second operand has 43 states, 43 states have (on average 2.7209302325581395) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:20:23,494 INFO L93 Difference]: Finished difference Result 1066 states and 1168 transitions. [2024-11-08 16:20:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-08 16:20:23,495 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.7209302325581395) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-08 16:20:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:20:23,497 INFO L225 Difference]: With dead ends: 1066 [2024-11-08 16:20:23,497 INFO L226 Difference]: Without dead ends: 977 [2024-11-08 16:20:23,497 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=353, Invalid=5653, Unknown=0, NotChecked=0, Total=6006 [2024-11-08 16:20:23,498 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 192 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 3183 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 2605 SdHoareTripleChecker+Invalid, 3214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:20:23,498 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 2605 Invalid, 3214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3183 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-08 16:20:23,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2024-11-08 16:20:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 733. [2024-11-08 16:20:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 729 states have (on average 1.1262002743484225) internal successors, (821), 732 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 821 transitions. [2024-11-08 16:20:23,512 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 821 transitions. Word has length 58 [2024-11-08 16:20:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:20:23,512 INFO L471 AbstractCegarLoop]: Abstraction has 733 states and 821 transitions. [2024-11-08 16:20:23,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.7209302325581395) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 821 transitions. [2024-11-08 16:20:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-08 16:20:23,514 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:20:23,514 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:20:23,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-08 16:20:23,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:23,715 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:20:23,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:20:23,715 INFO L85 PathProgramCache]: Analyzing trace with hash -337312762, now seen corresponding path program 2 times [2024-11-08 16:20:23,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:20:23,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367080156] [2024-11-08 16:20:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:20:23,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:20:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:20:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:20:24,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:20:24,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367080156] [2024-11-08 16:20:24,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367080156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:20:24,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965527603] [2024-11-08 16:20:24,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:20:24,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:24,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:20:24,600 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:20:24,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-08 16:20:24,820 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:20:24,820 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:20:24,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-08 16:20:24,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:20:24,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:20:24,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:20:24,843 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 10 treesize of output 8 [2024-11-08 16:20:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 28 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:20:26,091 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:20:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 28 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:20:27,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965527603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:20:27,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:20:27,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2024-11-08 16:20:27,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986035065] [2024-11-08 16:20:27,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:20:27,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-08 16:20:27,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:20:27,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-08 16:20:27,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 16:20:27,764 INFO L87 Difference]: Start difference. First operand 733 states and 821 transitions. Second operand has 51 states, 50 states have (on average 3.36) internal successors, (168), 51 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:30,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:20:30,729 INFO L93 Difference]: Finished difference Result 1016 states and 1109 transitions. [2024-11-08 16:20:30,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-08 16:20:30,730 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.36) internal successors, (168), 51 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-11-08 16:20:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:20:30,732 INFO L225 Difference]: With dead ends: 1016 [2024-11-08 16:20:30,733 INFO L226 Difference]: Without dead ends: 986 [2024-11-08 16:20:30,734 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=628, Invalid=5072, Unknown=0, NotChecked=0, Total=5700 [2024-11-08 16:20:30,734 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 250 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:20:30,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 966 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-08 16:20:30,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2024-11-08 16:20:30,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 769. [2024-11-08 16:20:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 765 states have (on average 1.1215686274509804) internal successors, (858), 768 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 858 transitions. [2024-11-08 16:20:30,749 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 858 transitions. Word has length 59 [2024-11-08 16:20:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:20:30,750 INFO L471 AbstractCegarLoop]: Abstraction has 769 states and 858 transitions. [2024-11-08 16:20:30,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.36) internal successors, (168), 51 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 858 transitions. [2024-11-08 16:20:30,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-08 16:20:30,752 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:20:30,752 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:20:30,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-08 16:20:30,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:30,953 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:20:30,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:20:30,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2129729483, now seen corresponding path program 7 times [2024-11-08 16:20:30,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:20:30,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061516953] [2024-11-08 16:20:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:20:30,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:20:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:20:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:20:31,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:20:31,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061516953] [2024-11-08 16:20:31,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061516953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:20:31,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475752897] [2024-11-08 16:20:31,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:20:31,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:31,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:20:31,517 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:20:31,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-08 16:20:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:20:31,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 16:20:31,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:20:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:20:32,052 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:20:32,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-08 16:20:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:20:32,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475752897] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:20:32,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:20:32,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2024-11-08 16:20:32,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317640260] [2024-11-08 16:20:32,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:20:32,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 16:20:32,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:20:32,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 16:20:32,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-11-08 16:20:32,408 INFO L87 Difference]: Start difference. First operand 769 states and 858 transitions. Second operand has 28 states, 27 states have (on average 3.925925925925926) internal successors, (106), 28 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:20:32,934 INFO L93 Difference]: Finished difference Result 907 states and 997 transitions. [2024-11-08 16:20:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 16:20:32,934 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.925925925925926) internal successors, (106), 28 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2024-11-08 16:20:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:20:32,937 INFO L225 Difference]: With dead ends: 907 [2024-11-08 16:20:32,937 INFO L226 Difference]: Without dead ends: 907 [2024-11-08 16:20:32,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2024-11-08 16:20:32,938 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 45 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:20:32,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 506 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 16:20:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2024-11-08 16:20:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 806. [2024-11-08 16:20:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 802 states have (on average 1.1172069825436408) internal successors, (896), 805 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 896 transitions. [2024-11-08 16:20:32,951 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 896 transitions. Word has length 60 [2024-11-08 16:20:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:20:32,951 INFO L471 AbstractCegarLoop]: Abstraction has 806 states and 896 transitions. [2024-11-08 16:20:32,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.925925925925926) internal successors, (106), 28 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 896 transitions. [2024-11-08 16:20:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-08 16:20:32,953 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:20:32,954 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:20:32,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-08 16:20:33,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:33,155 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:20:33,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:20:33,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1428886594, now seen corresponding path program 7 times [2024-11-08 16:20:33,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:20:33,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596350532] [2024-11-08 16:20:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:20:33,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:20:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:20:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:33,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:20:33,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596350532] [2024-11-08 16:20:33,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596350532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:20:33,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691959799] [2024-11-08 16:20:33,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:20:33,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:33,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:20:33,950 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:20:33,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-08 16:20:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:20:34,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-08 16:20:34,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:20:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 91 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:34,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:20:35,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-08 16:20:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 91 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:35,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691959799] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:20:35,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:20:35,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2024-11-08 16:20:35,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608286785] [2024-11-08 16:20:35,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:20:35,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-08 16:20:35,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:20:35,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-08 16:20:35,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2024-11-08 16:20:35,443 INFO L87 Difference]: Start difference. First operand 806 states and 896 transitions. Second operand has 44 states, 43 states have (on average 2.883720930232558) internal successors, (124), 44 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:36,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:20:36,763 INFO L93 Difference]: Finished difference Result 1105 states and 1208 transitions. [2024-11-08 16:20:36,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-08 16:20:36,763 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.883720930232558) internal successors, (124), 44 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-11-08 16:20:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:20:36,765 INFO L225 Difference]: With dead ends: 1105 [2024-11-08 16:20:36,765 INFO L226 Difference]: Without dead ends: 1087 [2024-11-08 16:20:36,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 91 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=1725, Unknown=0, NotChecked=0, Total=1980 [2024-11-08 16:20:36,766 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 173 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:20:36,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1389 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-08 16:20:36,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2024-11-08 16:20:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 799. [2024-11-08 16:20:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 795 states have (on average 1.119496855345912) internal successors, (890), 798 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 890 transitions. [2024-11-08 16:20:36,779 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 890 transitions. Word has length 62 [2024-11-08 16:20:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:20:36,780 INFO L471 AbstractCegarLoop]: Abstraction has 799 states and 890 transitions. [2024-11-08 16:20:36,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.883720930232558) internal successors, (124), 44 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:36,780 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 890 transitions. [2024-11-08 16:20:36,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-08 16:20:36,782 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:20:36,782 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:20:36,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-08 16:20:36,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:36,982 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:20:36,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:20:36,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1431341283, now seen corresponding path program 9 times [2024-11-08 16:20:36,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:20:36,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339305680] [2024-11-08 16:20:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:20:36,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:20:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:20:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 66 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:38,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:20:38,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339305680] [2024-11-08 16:20:38,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339305680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:20:38,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724867791] [2024-11-08 16:20:38,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:20:38,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:38,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:20:38,334 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:20:38,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-08 16:20:38,694 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-08 16:20:38,694 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:20:38,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-08 16:20:38,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:20:39,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:20:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:39,712 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:20:39,764 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 16 [2024-11-08 16:20:39,766 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 20 treesize of output 16 [2024-11-08 16:20:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:39,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724867791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:20:39,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:20:39,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 47 [2024-11-08 16:20:39,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101995279] [2024-11-08 16:20:39,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:20:39,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-08 16:20:39,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:20:39,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-08 16:20:39,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2040, Unknown=0, NotChecked=0, Total=2162 [2024-11-08 16:20:39,959 INFO L87 Difference]: Start difference. First operand 799 states and 890 transitions. Second operand has 47 states, 47 states have (on average 2.723404255319149) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:20:44,531 INFO L93 Difference]: Finished difference Result 1296 states and 1412 transitions. [2024-11-08 16:20:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-08 16:20:44,531 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.723404255319149) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-11-08 16:20:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:20:44,533 INFO L225 Difference]: With dead ends: 1296 [2024-11-08 16:20:44,533 INFO L226 Difference]: Without dead ends: 1201 [2024-11-08 16:20:44,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=403, Invalid=6907, Unknown=0, NotChecked=0, Total=7310 [2024-11-08 16:20:44,535 INFO L432 NwaCegarLoop]: 94 mSDtfsCounter, 231 mSDsluCounter, 2871 mSDsCounter, 0 mSdLazyCounter, 3870 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 2965 SdHoareTripleChecker+Invalid, 3913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:20:44,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 2965 Invalid, 3913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3870 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-08 16:20:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2024-11-08 16:20:44,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 903. [2024-11-08 16:20:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 899 states have (on average 1.1201334816462736) internal successors, (1007), 902 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1007 transitions. [2024-11-08 16:20:44,550 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1007 transitions. Word has length 64 [2024-11-08 16:20:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:20:44,551 INFO L471 AbstractCegarLoop]: Abstraction has 903 states and 1007 transitions. [2024-11-08 16:20:44,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.723404255319149) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1007 transitions. [2024-11-08 16:20:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-08 16:20:44,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:20:44,553 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:20:44,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-08 16:20:44,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-08 16:20:44,754 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:20:44,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:20:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1613869319, now seen corresponding path program 5 times [2024-11-08 16:20:44,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:20:44,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334171743] [2024-11-08 16:20:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:20:44,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:20:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:20:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:20:45,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:20:45,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334171743] [2024-11-08 16:20:45,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334171743] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:20:45,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179744604] [2024-11-08 16:20:45,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:20:45,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:45,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:20:45,922 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:20:45,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-08 16:20:46,234 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-08 16:20:46,234 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:20:46,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-08 16:20:46,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:20:46,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:20:46,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:20:46,329 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 10 treesize of output 8 [2024-11-08 16:20:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 42 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:20:48,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:20:49,867 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:20:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 66 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:20:50,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179744604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:20:50,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:20:50,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 21] total 61 [2024-11-08 16:20:50,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194447403] [2024-11-08 16:20:50,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:20:50,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-08 16:20:50,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:20:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-08 16:20:50,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=3294, Unknown=0, NotChecked=0, Total=3782 [2024-11-08 16:20:50,026 INFO L87 Difference]: Start difference. First operand 903 states and 1007 transitions. Second operand has 62 states, 61 states have (on average 3.1639344262295084) internal successors, (193), 62 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:53,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:20:53,110 INFO L93 Difference]: Finished difference Result 1320 states and 1428 transitions. [2024-11-08 16:20:53,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-08 16:20:53,111 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 3.1639344262295084) internal successors, (193), 62 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2024-11-08 16:20:53,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:20:53,114 INFO L225 Difference]: With dead ends: 1320 [2024-11-08 16:20:53,114 INFO L226 Difference]: Without dead ends: 1228 [2024-11-08 16:20:53,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1014, Invalid=6296, Unknown=0, NotChecked=0, Total=7310 [2024-11-08 16:20:53,115 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 239 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-08 16:20:53,115 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 1157 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2259 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-08 16:20:53,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2024-11-08 16:20:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 935. [2024-11-08 16:20:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 931 states have (on average 1.1149301825993556) internal successors, (1038), 934 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1038 transitions. [2024-11-08 16:20:53,123 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1038 transitions. Word has length 65 [2024-11-08 16:20:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:20:53,123 INFO L471 AbstractCegarLoop]: Abstraction has 935 states and 1038 transitions. [2024-11-08 16:20:53,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 3.1639344262295084) internal successors, (193), 62 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1038 transitions. [2024-11-08 16:20:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-08 16:20:53,125 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:20:53,125 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:20:53,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-08 16:20:53,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:53,326 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:20:53,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:20:53,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1658176867, now seen corresponding path program 8 times [2024-11-08 16:20:53,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:20:53,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782935175] [2024-11-08 16:20:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:20:53,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:20:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:20:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:20:54,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:20:54,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782935175] [2024-11-08 16:20:54,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782935175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:20:54,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422393798] [2024-11-08 16:20:54,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:20:54,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:54,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:20:54,614 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:20:54,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-08 16:20:54,902 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:20:54,902 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:20:54,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-08 16:20:54,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:20:55,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:20:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:20:55,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:20:55,298 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 15 treesize of output 13 [2024-11-08 16:20:55,300 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 16 treesize of output 12 [2024-11-08 16:20:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:20:55,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422393798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:20:55,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:20:55,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 16] total 32 [2024-11-08 16:20:55,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426638201] [2024-11-08 16:20:55,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:20:55,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 16:20:55,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:20:55,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 16:20:55,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2024-11-08 16:20:55,417 INFO L87 Difference]: Start difference. First operand 935 states and 1038 transitions. Second operand has 32 states, 32 states have (on average 3.125) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:20:56,763 INFO L93 Difference]: Finished difference Result 1497 states and 1652 transitions. [2024-11-08 16:20:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-08 16:20:56,764 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.125) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-08 16:20:56,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:20:56,766 INFO L225 Difference]: With dead ends: 1497 [2024-11-08 16:20:56,767 INFO L226 Difference]: Without dead ends: 1320 [2024-11-08 16:20:56,767 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=1809, Unknown=0, NotChecked=0, Total=1980 [2024-11-08 16:20:56,767 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 45 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:20:56,767 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 750 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 16:20:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2024-11-08 16:20:56,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1126. [2024-11-08 16:20:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1122 states have (on average 1.1140819964349375) internal successors, (1250), 1125 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1250 transitions. [2024-11-08 16:20:56,782 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1250 transitions. Word has length 66 [2024-11-08 16:20:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:20:56,782 INFO L471 AbstractCegarLoop]: Abstraction has 1126 states and 1250 transitions. [2024-11-08 16:20:56,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.125) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:20:56,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1250 transitions. [2024-11-08 16:20:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-08 16:20:56,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:20:56,785 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:20:56,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-08 16:20:56,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:56,986 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:20:56,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:20:56,987 INFO L85 PathProgramCache]: Analyzing trace with hash 422975176, now seen corresponding path program 6 times [2024-11-08 16:20:56,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:20:56,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657766511] [2024-11-08 16:20:56,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:20:56,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:20:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:20:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:20:58,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:20:58,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657766511] [2024-11-08 16:20:58,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657766511] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:20:58,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352864737] [2024-11-08 16:20:58,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:20:58,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:20:58,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:20:58,636 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:20:58,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-08 16:20:58,948 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-08 16:20:58,948 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:20:58,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-11-08 16:20:58,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:20:59,050 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 10 treesize of output 8 [2024-11-08 16:20:59,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:21:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:01,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:21:04,633 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:21:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:04,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352864737] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:21:04,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:21:04,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26, 27] total 71 [2024-11-08 16:21:04,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070949580] [2024-11-08 16:21:04,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:21:04,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-08 16:21:04,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-08 16:21:04,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=4588, Unknown=0, NotChecked=0, Total=5112 [2024-11-08 16:21:04,915 INFO L87 Difference]: Start difference. First operand 1126 states and 1250 transitions. Second operand has 72 states, 71 states have (on average 2.6901408450704225) internal successors, (191), 72 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:08,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:21:08,071 INFO L93 Difference]: Finished difference Result 1301 states and 1424 transitions. [2024-11-08 16:21:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-08 16:21:08,071 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.6901408450704225) internal successors, (191), 72 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-11-08 16:21:08,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:21:08,074 INFO L225 Difference]: With dead ends: 1301 [2024-11-08 16:21:08,075 INFO L226 Difference]: Without dead ends: 1249 [2024-11-08 16:21:08,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3223 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1121, Invalid=8779, Unknown=0, NotChecked=0, Total=9900 [2024-11-08 16:21:08,076 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 264 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:21:08,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 361 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1906 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-08 16:21:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2024-11-08 16:21:08,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1134. [2024-11-08 16:21:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1130 states have (on average 1.1123893805309735) internal successors, (1257), 1133 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1257 transitions. [2024-11-08 16:21:08,086 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1257 transitions. Word has length 67 [2024-11-08 16:21:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:21:08,086 INFO L471 AbstractCegarLoop]: Abstraction has 1134 states and 1257 transitions. [2024-11-08 16:21:08,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.6901408450704225) internal successors, (191), 72 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1257 transitions. [2024-11-08 16:21:08,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-08 16:21:08,088 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:21:08,088 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:21:08,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-08 16:21:08,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:21:08,288 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:21:08,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:08,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1255295011, now seen corresponding path program 8 times [2024-11-08 16:21:08,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:08,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915418890] [2024-11-08 16:21:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:08,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 91 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:08,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:08,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915418890] [2024-11-08 16:21:08,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915418890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:21:08,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527030753] [2024-11-08 16:21:08,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:21:08,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:21:08,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:21:08,923 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:21:08,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-08 16:21:09,167 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:21:09,167 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:21:09,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-08 16:21:09,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:21:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:09,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:21:10,082 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 23 treesize of output 19 [2024-11-08 16:21:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:10,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527030753] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:21:10,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:21:10,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 55 [2024-11-08 16:21:10,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738463093] [2024-11-08 16:21:10,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:21:10,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-08 16:21:10,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:10,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-08 16:21:10,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=2664, Unknown=0, NotChecked=0, Total=3080 [2024-11-08 16:21:10,660 INFO L87 Difference]: Start difference. First operand 1134 states and 1257 transitions. Second operand has 56 states, 55 states have (on average 3.2181818181818183) internal successors, (177), 56 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:21:12,279 INFO L93 Difference]: Finished difference Result 1516 states and 1657 transitions. [2024-11-08 16:21:12,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-08 16:21:12,279 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.2181818181818183) internal successors, (177), 56 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2024-11-08 16:21:12,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:21:12,283 INFO L225 Difference]: With dead ends: 1516 [2024-11-08 16:21:12,283 INFO L226 Difference]: Without dead ends: 1492 [2024-11-08 16:21:12,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=447, Invalid=2745, Unknown=0, NotChecked=0, Total=3192 [2024-11-08 16:21:12,284 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 131 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 2800 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 2819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:21:12,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1735 Invalid, 2819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2800 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-08 16:21:12,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2024-11-08 16:21:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1125. [2024-11-08 16:21:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1121 states have (on average 1.1141837644959858) internal successors, (1249), 1124 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1249 transitions. [2024-11-08 16:21:12,294 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1249 transitions. Word has length 68 [2024-11-08 16:21:12,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:21:12,295 INFO L471 AbstractCegarLoop]: Abstraction has 1125 states and 1249 transitions. [2024-11-08 16:21:12,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.2181818181818183) internal successors, (177), 56 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:12,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1249 transitions. [2024-11-08 16:21:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-08 16:21:12,296 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:21:12,296 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:21:12,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-08 16:21:12,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-11-08 16:21:12,497 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:21:12,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:12,497 INFO L85 PathProgramCache]: Analyzing trace with hash 325894496, now seen corresponding path program 7 times [2024-11-08 16:21:12,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:12,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638640429] [2024-11-08 16:21:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:12,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:21:14,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:14,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638640429] [2024-11-08 16:21:14,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638640429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:21:14,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249445834] [2024-11-08 16:21:14,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:21:14,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:21:14,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:21:14,240 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:21:14,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-08 16:21:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:14,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-08 16:21:14,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:21:14,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:21:14,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:21:14,680 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 10 treesize of output 8 [2024-11-08 16:21:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:21:17,186 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:21:19,741 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:21:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 45 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:21:19,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249445834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:21:19,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:21:19,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 23] total 64 [2024-11-08 16:21:19,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415424168] [2024-11-08 16:21:19,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:21:19,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-08 16:21:19,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:19,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-08 16:21:19,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=3682, Unknown=0, NotChecked=0, Total=4160 [2024-11-08 16:21:19,922 INFO L87 Difference]: Start difference. First operand 1125 states and 1249 transitions. Second operand has 65 states, 64 states have (on average 3.015625) internal successors, (193), 65 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:23,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:21:23,651 INFO L93 Difference]: Finished difference Result 1539 states and 1660 transitions. [2024-11-08 16:21:23,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-08 16:21:23,651 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.015625) internal successors, (193), 65 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-11-08 16:21:23,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:21:23,655 INFO L225 Difference]: With dead ends: 1539 [2024-11-08 16:21:23,656 INFO L226 Difference]: Without dead ends: 1465 [2024-11-08 16:21:23,656 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=973, Invalid=7037, Unknown=0, NotChecked=0, Total=8010 [2024-11-08 16:21:23,656 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 190 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 2637 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:21:23,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1220 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2637 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-08 16:21:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2024-11-08 16:21:23,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1021. [2024-11-08 16:21:23,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1017 states have (on average 1.1189773844641102) internal successors, (1138), 1020 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:23,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1138 transitions. [2024-11-08 16:21:23,669 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1138 transitions. Word has length 69 [2024-11-08 16:21:23,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:21:23,670 INFO L471 AbstractCegarLoop]: Abstraction has 1021 states and 1138 transitions. [2024-11-08 16:21:23,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.015625) internal successors, (193), 65 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:23,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1138 transitions. [2024-11-08 16:21:23,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-08 16:21:23,671 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:21:23,671 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:21:23,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-08 16:21:23,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:21:23,872 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:21:23,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:23,872 INFO L85 PathProgramCache]: Analyzing trace with hash 184663358, now seen corresponding path program 10 times [2024-11-08 16:21:23,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:23,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659001962] [2024-11-08 16:21:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:23,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 91 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:25,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:25,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659001962] [2024-11-08 16:21:25,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659001962] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:21:25,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799560059] [2024-11-08 16:21:25,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:21:25,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:21:25,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:21:25,471 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:21:25,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-08 16:21:25,921 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:21:25,921 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:21:25,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-08 16:21:25,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:21:26,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:21:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 10 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:27,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:21:27,349 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 16 [2024-11-08 16:21:27,352 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 20 treesize of output 16 [2024-11-08 16:21:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 10 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:27,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799560059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:21:27,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:21:27,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 51 [2024-11-08 16:21:27,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018011572] [2024-11-08 16:21:27,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:21:27,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-08 16:21:27,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:27,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-08 16:21:27,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2414, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 16:21:27,574 INFO L87 Difference]: Start difference. First operand 1021 states and 1138 transitions. Second operand has 51 states, 51 states have (on average 2.764705882352941) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:33,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:21:33,186 INFO L93 Difference]: Finished difference Result 1618 states and 1766 transitions. [2024-11-08 16:21:33,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-08 16:21:33,186 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.764705882352941) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-08 16:21:33,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:21:33,190 INFO L225 Difference]: With dead ends: 1618 [2024-11-08 16:21:33,190 INFO L226 Difference]: Without dead ends: 1513 [2024-11-08 16:21:33,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=461, Invalid=8469, Unknown=0, NotChecked=0, Total=8930 [2024-11-08 16:21:33,192 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 239 mSDsluCounter, 3270 mSDsCounter, 0 mSdLazyCounter, 4385 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 3370 SdHoareTripleChecker+Invalid, 4424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:21:33,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 3370 Invalid, 4424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 4385 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-08 16:21:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2024-11-08 16:21:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1139. [2024-11-08 16:21:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1135 states have (on average 1.118942731277533) internal successors, (1270), 1138 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:33,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1270 transitions. [2024-11-08 16:21:33,206 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1270 transitions. Word has length 70 [2024-11-08 16:21:33,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:21:33,206 INFO L471 AbstractCegarLoop]: Abstraction has 1139 states and 1270 transitions. [2024-11-08 16:21:33,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.764705882352941) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:33,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1270 transitions. [2024-11-08 16:21:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-08 16:21:33,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:21:33,207 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:21:33,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-08 16:21:33,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-11-08 16:21:33,408 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:21:33,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:33,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1579979828, now seen corresponding path program 3 times [2024-11-08 16:21:33,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:33,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334073056] [2024-11-08 16:21:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:33,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 14 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:21:34,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334073056] [2024-11-08 16:21:34,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334073056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:21:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094445061] [2024-11-08 16:21:34,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:21:34,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:21:34,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:21:34,809 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:21:34,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-08 16:21:35,274 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 16:21:35,274 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:21:35,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-08 16:21:35,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:21:35,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:21:35,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:21:35,356 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 10 treesize of output 8 [2024-11-08 16:21:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 16:21:37,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:21:39,915 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:21:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 16:21:39,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094445061] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:21:39,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:21:39,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 57 [2024-11-08 16:21:39,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039831403] [2024-11-08 16:21:39,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:21:39,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-08 16:21:39,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:39,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-08 16:21:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=2954, Unknown=0, NotChecked=0, Total=3306 [2024-11-08 16:21:39,930 INFO L87 Difference]: Start difference. First operand 1139 states and 1270 transitions. Second operand has 58 states, 57 states have (on average 3.210526315789474) internal successors, (183), 58 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:47,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:21:47,543 INFO L93 Difference]: Finished difference Result 1632 states and 1778 transitions. [2024-11-08 16:21:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-08 16:21:47,544 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.210526315789474) internal successors, (183), 58 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-11-08 16:21:47,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:21:47,548 INFO L225 Difference]: With dead ends: 1632 [2024-11-08 16:21:47,548 INFO L226 Difference]: Without dead ends: 1602 [2024-11-08 16:21:47,549 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3218 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1695, Invalid=12825, Unknown=0, NotChecked=0, Total=14520 [2024-11-08 16:21:47,550 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 326 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 3273 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 3355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:21:47,550 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 798 Invalid, 3355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3273 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-08 16:21:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2024-11-08 16:21:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1233. [2024-11-08 16:21:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1229 states have (on average 1.111472742066721) internal successors, (1366), 1232 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1366 transitions. [2024-11-08 16:21:47,570 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1366 transitions. Word has length 71 [2024-11-08 16:21:47,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:21:47,571 INFO L471 AbstractCegarLoop]: Abstraction has 1233 states and 1366 transitions. [2024-11-08 16:21:47,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.210526315789474) internal successors, (183), 58 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1366 transitions. [2024-11-08 16:21:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-08 16:21:47,573 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:21:47,573 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:21:47,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-08 16:21:47,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-11-08 16:21:47,774 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:21:47,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1145068860, now seen corresponding path program 4 times [2024-11-08 16:21:47,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:47,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614828769] [2024-11-08 16:21:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:47,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 45 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:21:48,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:48,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614828769] [2024-11-08 16:21:48,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614828769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:21:48,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718452261] [2024-11-08 16:21:48,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:21:48,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:21:48,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:21:48,929 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:21:48,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-08 16:21:49,356 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:21:49,356 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:21:49,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-08 16:21:49,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:21:49,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:21:49,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:21:49,410 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 10 treesize of output 8 [2024-11-08 16:21:50,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 16:21:51,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 16:21:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:21:52,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:21:53,437 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 15 treesize of output 13 [2024-11-08 16:21:53,440 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 16 treesize of output 12 [2024-11-08 16:21:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:21:55,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718452261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:21:55,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:21:55,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 25] total 71 [2024-11-08 16:21:55,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683607173] [2024-11-08 16:21:55,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:21:55,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-08 16:21:55,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-08 16:21:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=4637, Unknown=0, NotChecked=0, Total=5112 [2024-11-08 16:21:55,136 INFO L87 Difference]: Start difference. First operand 1233 states and 1366 transitions. Second operand has 72 states, 71 states have (on average 2.887323943661972) internal successors, (205), 72 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:07,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:22:07,609 INFO L93 Difference]: Finished difference Result 1694 states and 1836 transitions. [2024-11-08 16:22:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2024-11-08 16:22:07,610 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.887323943661972) internal successors, (205), 72 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-11-08 16:22:07,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:22:07,613 INFO L225 Difference]: With dead ends: 1694 [2024-11-08 16:22:07,613 INFO L226 Difference]: Without dead ends: 1660 [2024-11-08 16:22:07,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7186 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=2434, Invalid=23006, Unknown=0, NotChecked=0, Total=25440 [2024-11-08 16:22:07,615 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 446 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 4810 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 4970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 4810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:22:07,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 1881 Invalid, 4970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 4810 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-08 16:22:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2024-11-08 16:22:07,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1221. [2024-11-08 16:22:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1217 states have (on average 1.1101068200493016) internal successors, (1351), 1220 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1351 transitions. [2024-11-08 16:22:07,636 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1351 transitions. Word has length 71 [2024-11-08 16:22:07,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:22:07,637 INFO L471 AbstractCegarLoop]: Abstraction has 1221 states and 1351 transitions. [2024-11-08 16:22:07,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.887323943661972) internal successors, (205), 72 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1351 transitions. [2024-11-08 16:22:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-08 16:22:07,639 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:22:07,639 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:22:07,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-08 16:22:07,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-08 16:22:07,840 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:22:07,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash 631862791, now seen corresponding path program 8 times [2024-11-08 16:22:07,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:07,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839444338] [2024-11-08 16:22:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:07,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:22:09,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:09,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839444338] [2024-11-08 16:22:09,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839444338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:22:09,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096783477] [2024-11-08 16:22:09,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:22:09,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:09,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:22:09,359 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:22:09,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-08 16:22:09,700 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:22:09,700 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:22:09,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-11-08 16:22:09,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:22:09,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:22:09,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:22:09,805 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 10 treesize of output 8 [2024-11-08 16:22:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 15 proven. 63 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:22:11,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:22:13,764 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:22:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:22:13,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096783477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:22:13,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:22:13,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 21] total 62 [2024-11-08 16:22:13,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108463637] [2024-11-08 16:22:13,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:22:13,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-08 16:22:13,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:13,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-08 16:22:13,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=3477, Unknown=0, NotChecked=0, Total=3906 [2024-11-08 16:22:13,930 INFO L87 Difference]: Start difference. First operand 1221 states and 1351 transitions. Second operand has 63 states, 62 states have (on average 3.1129032258064515) internal successors, (193), 63 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:16,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:22:16,888 INFO L93 Difference]: Finished difference Result 1505 states and 1638 transitions. [2024-11-08 16:22:16,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-08 16:22:16,888 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.1129032258064515) internal successors, (193), 63 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-11-08 16:22:16,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:22:16,890 INFO L225 Difference]: With dead ends: 1505 [2024-11-08 16:22:16,890 INFO L226 Difference]: Without dead ends: 1467 [2024-11-08 16:22:16,891 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=890, Invalid=6250, Unknown=0, NotChecked=0, Total=7140 [2024-11-08 16:22:16,891 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 185 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:22:16,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 660 Invalid, 1854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-08 16:22:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2024-11-08 16:22:16,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1129. [2024-11-08 16:22:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1125 states have (on average 1.1146666666666667) internal successors, (1254), 1128 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1254 transitions. [2024-11-08 16:22:16,903 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1254 transitions. Word has length 73 [2024-11-08 16:22:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:22:16,904 INFO L471 AbstractCegarLoop]: Abstraction has 1129 states and 1254 transitions. [2024-11-08 16:22:16,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.1129032258064515) internal successors, (193), 63 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1254 transitions. [2024-11-08 16:22:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-08 16:22:16,906 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:22:16,906 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:22:16,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-08 16:22:17,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-08 16:22:17,107 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:22:17,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:17,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1117179452, now seen corresponding path program 9 times [2024-11-08 16:22:17,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:17,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186475817] [2024-11-08 16:22:17,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:17,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 120 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:22:18,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:18,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186475817] [2024-11-08 16:22:18,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186475817] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:22:18,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617824960] [2024-11-08 16:22:18,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:22:18,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:22:18,078 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:22:18,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-08 16:22:18,526 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-08 16:22:18,526 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:22:18,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-08 16:22:18,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:22:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 162 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:22:19,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:22:20,065 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 8 treesize of output 6 [2024-11-08 16:22:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 162 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:22:20,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617824960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:22:20,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:22:20,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 61 [2024-11-08 16:22:20,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535727972] [2024-11-08 16:22:20,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:22:20,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-08 16:22:20,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:20,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-08 16:22:20,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=3218, Unknown=0, NotChecked=0, Total=3782 [2024-11-08 16:22:20,421 INFO L87 Difference]: Start difference. First operand 1129 states and 1254 transitions. Second operand has 62 states, 61 states have (on average 2.737704918032787) internal successors, (167), 62 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:22:21,669 INFO L93 Difference]: Finished difference Result 1548 states and 1693 transitions. [2024-11-08 16:22:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-08 16:22:21,670 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.737704918032787) internal successors, (167), 62 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-08 16:22:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:22:21,672 INFO L225 Difference]: With dead ends: 1548 [2024-11-08 16:22:21,672 INFO L226 Difference]: Without dead ends: 1524 [2024-11-08 16:22:21,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 99 SyntacticMatches, 11 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=587, Invalid=3319, Unknown=0, NotChecked=0, Total=3906 [2024-11-08 16:22:21,672 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 294 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 2027 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:22:21,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 1263 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2027 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 16:22:21,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2024-11-08 16:22:21,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1143. [2024-11-08 16:22:21,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1139 states have (on average 1.1150131694468832) internal successors, (1270), 1142 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1270 transitions. [2024-11-08 16:22:21,689 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1270 transitions. Word has length 74 [2024-11-08 16:22:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:22:21,689 INFO L471 AbstractCegarLoop]: Abstraction has 1143 states and 1270 transitions. [2024-11-08 16:22:21,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.737704918032787) internal successors, (167), 62 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1270 transitions. [2024-11-08 16:22:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-08 16:22:21,691 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:22:21,692 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:22:21,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-11-08 16:22:21,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-08 16:22:21,892 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:22:21,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:21,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1916981869, now seen corresponding path program 9 times [2024-11-08 16:22:21,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:21,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268244229] [2024-11-08 16:22:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:21,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 16:22:22,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:22,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268244229] [2024-11-08 16:22:22,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268244229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:22:22,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26111785] [2024-11-08 16:22:22,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:22:22,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:22,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:22:22,517 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:22:22,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-08 16:22:22,917 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-08 16:22:22,918 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:22:22,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-08 16:22:22,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:22:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 58 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 16:22:23,376 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:22:23,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-08 16:22:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 58 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 16:22:23,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26111785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:22:23,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:22:23,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2024-11-08 16:22:23,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739663277] [2024-11-08 16:22:23,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:22:23,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 16:22:23,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 16:22:23,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 16:22:23,937 INFO L87 Difference]: Start difference. First operand 1143 states and 1270 transitions. Second operand has 37 states, 36 states have (on average 4.166666666666667) internal successors, (150), 37 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:24,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:22:24,675 INFO L93 Difference]: Finished difference Result 1317 states and 1442 transitions. [2024-11-08 16:22:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 16:22:24,675 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.166666666666667) internal successors, (150), 37 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-08 16:22:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:22:24,677 INFO L225 Difference]: With dead ends: 1317 [2024-11-08 16:22:24,678 INFO L226 Difference]: Without dead ends: 1317 [2024-11-08 16:22:24,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=232, Invalid=1490, Unknown=0, NotChecked=0, Total=1722 [2024-11-08 16:22:24,678 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 64 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:22:24,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 647 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 16:22:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2024-11-08 16:22:24,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1198. [2024-11-08 16:22:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1194 states have (on average 1.109715242881072) internal successors, (1325), 1197 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1325 transitions. [2024-11-08 16:22:24,689 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1325 transitions. Word has length 74 [2024-11-08 16:22:24,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:22:24,689 INFO L471 AbstractCegarLoop]: Abstraction has 1198 states and 1325 transitions. [2024-11-08 16:22:24,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.166666666666667) internal successors, (150), 37 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:24,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1325 transitions. [2024-11-08 16:22:24,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-08 16:22:24,691 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:22:24,691 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:22:24,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-08 16:22:24,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-08 16:22:24,892 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:22:24,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:24,892 INFO L85 PathProgramCache]: Analyzing trace with hash 55470367, now seen corresponding path program 11 times [2024-11-08 16:22:24,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:24,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252552190] [2024-11-08 16:22:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:24,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 120 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:22:26,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:26,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252552190] [2024-11-08 16:22:26,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252552190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:22:26,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836200948] [2024-11-08 16:22:26,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:22:26,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:26,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:22:26,412 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:22:26,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-08 16:22:26,825 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-08 16:22:26,825 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:22:26,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-08 16:22:26,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:22:27,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:22:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:22:28,134 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:22:28,188 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 16 [2024-11-08 16:22:28,191 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 20 treesize of output 16 [2024-11-08 16:22:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:22:28,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836200948] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:22:28,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:22:28,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 55 [2024-11-08 16:22:28,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691011352] [2024-11-08 16:22:28,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:22:28,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-08 16:22:28,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:28,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-08 16:22:28,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2817, Unknown=0, NotChecked=0, Total=2970 [2024-11-08 16:22:28,416 INFO L87 Difference]: Start difference. First operand 1198 states and 1325 transitions. Second operand has 55 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 55 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:34,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:22:34,436 INFO L93 Difference]: Finished difference Result 1880 states and 2039 transitions. [2024-11-08 16:22:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-11-08 16:22:34,437 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 55 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2024-11-08 16:22:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:22:34,439 INFO L225 Difference]: With dead ends: 1880 [2024-11-08 16:22:34,439 INFO L226 Difference]: Without dead ends: 1769 [2024-11-08 16:22:34,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=512, Invalid=9790, Unknown=0, NotChecked=0, Total=10302 [2024-11-08 16:22:34,440 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 242 mSDsluCounter, 4025 mSDsCounter, 0 mSdLazyCounter, 5633 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 4130 SdHoareTripleChecker+Invalid, 5676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 5633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:22:34,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 4130 Invalid, 5676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 5633 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-08 16:22:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2024-11-08 16:22:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1320. [2024-11-08 16:22:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1316 states have (on average 1.1101823708206686) internal successors, (1461), 1319 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:34,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1461 transitions. [2024-11-08 16:22:34,452 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1461 transitions. Word has length 76 [2024-11-08 16:22:34,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:22:34,453 INFO L471 AbstractCegarLoop]: Abstraction has 1320 states and 1461 transitions. [2024-11-08 16:22:34,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 55 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:34,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1461 transitions. [2024-11-08 16:22:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-08 16:22:34,455 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:22:34,455 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:22:34,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-08 16:22:34,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:34,656 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:22:34,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:34,657 INFO L85 PathProgramCache]: Analyzing trace with hash 221798967, now seen corresponding path program 9 times [2024-11-08 16:22:34,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:34,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869158412] [2024-11-08 16:22:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:34,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 66 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:22:35,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:35,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869158412] [2024-11-08 16:22:35,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869158412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:22:35,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472387954] [2024-11-08 16:22:35,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:22:35,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:35,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:22:35,978 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:22:35,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-08 16:22:36,448 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-08 16:22:36,448 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:22:36,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-08 16:22:36,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:22:36,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:22:36,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:22:36,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-08 16:22:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:22:38,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:22:40,947 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:22:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:22:41,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472387954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:22:41,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:22:41,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 27] total 74 [2024-11-08 16:22:41,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430586560] [2024-11-08 16:22:41,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:22:41,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-08 16:22:41,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:41,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-08 16:22:41,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=4953, Unknown=0, NotChecked=0, Total=5550 [2024-11-08 16:22:41,110 INFO L87 Difference]: Start difference. First operand 1320 states and 1461 transitions. Second operand has 75 states, 74 states have (on average 3.0945945945945947) internal successors, (229), 75 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:47,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:22:47,797 INFO L93 Difference]: Finished difference Result 2178 states and 2345 transitions. [2024-11-08 16:22:47,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-08 16:22:47,798 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.0945945945945947) internal successors, (229), 75 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2024-11-08 16:22:47,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:22:47,802 INFO L225 Difference]: With dead ends: 2178 [2024-11-08 16:22:47,802 INFO L226 Difference]: Without dead ends: 2068 [2024-11-08 16:22:47,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3473 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1239, Invalid=10533, Unknown=0, NotChecked=0, Total=11772 [2024-11-08 16:22:47,804 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 380 mSDsluCounter, 2595 mSDsCounter, 0 mSdLazyCounter, 5760 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 5909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 5760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:22:47,804 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 2685 Invalid, 5909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 5760 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-08 16:22:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2024-11-08 16:22:47,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1332. [2024-11-08 16:22:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1328 states have (on average 1.1091867469879517) internal successors, (1473), 1331 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1473 transitions. [2024-11-08 16:22:47,837 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1473 transitions. Word has length 77 [2024-11-08 16:22:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:22:47,838 INFO L471 AbstractCegarLoop]: Abstraction has 1332 states and 1473 transitions. [2024-11-08 16:22:47,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.0945945945945947) internal successors, (229), 75 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1473 transitions. [2024-11-08 16:22:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-08 16:22:47,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:22:47,840 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:22:47,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-08 16:22:48,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:48,041 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:22:48,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:48,041 INFO L85 PathProgramCache]: Analyzing trace with hash 265412901, now seen corresponding path program 10 times [2024-11-08 16:22:48,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:48,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970498056] [2024-11-08 16:22:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:48,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 153 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:22:49,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:49,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970498056] [2024-11-08 16:22:49,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970498056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:22:49,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350145441] [2024-11-08 16:22:49,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:22:49,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:49,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:22:49,426 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:22:49,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-08 16:22:49,991 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:22:49,991 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:22:49,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-08 16:22:50,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:22:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 190 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:22:50,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:22:51,383 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 23 treesize of output 19 [2024-11-08 16:22:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 190 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:22:52,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350145441] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:22:52,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:22:52,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 65 [2024-11-08 16:22:52,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048337304] [2024-11-08 16:22:52,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:22:52,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-08 16:22:52,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:52,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-08 16:22:52,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=3711, Unknown=0, NotChecked=0, Total=4290 [2024-11-08 16:22:52,241 INFO L87 Difference]: Start difference. First operand 1332 states and 1473 transitions. Second operand has 66 states, 65 states have (on average 3.2153846153846155) internal successors, (209), 66 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:22:54,601 INFO L93 Difference]: Finished difference Result 1825 states and 1987 transitions. [2024-11-08 16:22:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-08 16:22:54,602 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 3.2153846153846155) internal successors, (209), 66 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2024-11-08 16:22:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:22:54,604 INFO L225 Difference]: With dead ends: 1825 [2024-11-08 16:22:54,604 INFO L226 Difference]: Without dead ends: 1801 [2024-11-08 16:22:54,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=616, Invalid=3806, Unknown=0, NotChecked=0, Total=4422 [2024-11-08 16:22:54,605 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 295 mSDsluCounter, 2238 mSDsCounter, 0 mSdLazyCounter, 3709 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 2326 SdHoareTripleChecker+Invalid, 3755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:22:54,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 2326 Invalid, 3755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3709 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-08 16:22:54,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2024-11-08 16:22:54,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1354. [2024-11-08 16:22:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1350 states have (on average 1.1088888888888888) internal successors, (1497), 1353 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1497 transitions. [2024-11-08 16:22:54,618 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1497 transitions. Word has length 80 [2024-11-08 16:22:54,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:22:54,619 INFO L471 AbstractCegarLoop]: Abstraction has 1354 states and 1497 transitions. [2024-11-08 16:22:54,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 3.2153846153846155) internal successors, (209), 66 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:54,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1497 transitions. [2024-11-08 16:22:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-08 16:22:54,621 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:22:54,621 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:22:54,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-08 16:22:54,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:54,822 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:22:54,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:54,822 INFO L85 PathProgramCache]: Analyzing trace with hash -797314113, now seen corresponding path program 10 times [2024-11-08 16:22:54,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:54,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754393340] [2024-11-08 16:22:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:54,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 30 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:22:56,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:56,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754393340] [2024-11-08 16:22:56,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754393340] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:22:56,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703528129] [2024-11-08 16:22:56,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:22:56,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:56,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:22:56,300 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:22:56,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-08 16:22:56,680 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:22:56,680 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:22:56,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-08 16:22:56,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:22:56,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:22:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 15 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 16:22:57,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:22:57,189 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 15 treesize of output 13 [2024-11-08 16:22:57,192 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 16 treesize of output 12 [2024-11-08 16:22:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 15 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 16:22:57,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703528129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:22:57,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:22:57,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 18] total 36 [2024-11-08 16:22:57,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145869084] [2024-11-08 16:22:57,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:22:57,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-08 16:22:57,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:57,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-08 16:22:57,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2024-11-08 16:22:57,359 INFO L87 Difference]: Start difference. First operand 1354 states and 1497 transitions. Second operand has 36 states, 36 states have (on average 3.2777777777777777) internal successors, (118), 36 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:59,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:22:59,257 INFO L93 Difference]: Finished difference Result 2153 states and 2360 transitions. [2024-11-08 16:22:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-08 16:22:59,257 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.2777777777777777) internal successors, (118), 36 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2024-11-08 16:22:59,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:22:59,261 INFO L225 Difference]: With dead ends: 2153 [2024-11-08 16:22:59,261 INFO L226 Difference]: Without dead ends: 1808 [2024-11-08 16:22:59,262 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=200, Invalid=2452, Unknown=0, NotChecked=0, Total=2652 [2024-11-08 16:22:59,262 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 57 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:22:59,262 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1154 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-08 16:22:59,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2024-11-08 16:22:59,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1563. [2024-11-08 16:22:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1559 states have (on average 1.1064785118665812) internal successors, (1725), 1562 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 1725 transitions. [2024-11-08 16:22:59,286 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 1725 transitions. Word has length 80 [2024-11-08 16:22:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:22:59,286 INFO L471 AbstractCegarLoop]: Abstraction has 1563 states and 1725 transitions. [2024-11-08 16:22:59,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.2777777777777777) internal successors, (118), 36 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 1725 transitions. [2024-11-08 16:22:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-08 16:22:59,288 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:22:59,289 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:22:59,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-08 16:22:59,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:59,489 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:22:59,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:59,490 INFO L85 PathProgramCache]: Analyzing trace with hash 681339046, now seen corresponding path program 10 times [2024-11-08 16:22:59,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:59,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348283990] [2024-11-08 16:22:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:59,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:23:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 39 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 16:23:01,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:23:01,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348283990] [2024-11-08 16:23:01,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348283990] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:23:01,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368758332] [2024-11-08 16:23:01,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:23:01,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:23:01,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:23:01,259 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:23:01,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-08 16:23:01,939 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:23:01,939 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:23:01,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-08 16:23:01,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:23:02,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:23:02,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:23:02,064 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 10 treesize of output 8 [2024-11-08 16:23:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 16:23:05,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:23:08,339 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:23:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 16:23:08,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368758332] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:23:08,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:23:08,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2024-11-08 16:23:08,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906880351] [2024-11-08 16:23:08,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:23:08,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-08 16:23:08,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:23:08,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-08 16:23:08,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=4834, Unknown=0, NotChecked=0, Total=5402 [2024-11-08 16:23:08,589 INFO L87 Difference]: Start difference. First operand 1563 states and 1725 transitions. Second operand has 74 states, 73 states have (on average 2.808219178082192) internal successors, (205), 74 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:13,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:23:13,344 INFO L93 Difference]: Finished difference Result 1977 states and 2146 transitions. [2024-11-08 16:23:13,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-08 16:23:13,345 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 2.808219178082192) internal successors, (205), 74 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2024-11-08 16:23:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:23:13,348 INFO L225 Difference]: With dead ends: 1977 [2024-11-08 16:23:13,348 INFO L226 Difference]: Without dead ends: 1919 [2024-11-08 16:23:13,349 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3570 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1493, Invalid=10063, Unknown=0, NotChecked=0, Total=11556 [2024-11-08 16:23:13,349 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 246 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 2034 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 2076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-08 16:23:13,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 736 Invalid, 2076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2034 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-08 16:23:13,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2024-11-08 16:23:13,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1494. [2024-11-08 16:23:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1490 states have (on average 1.1087248322147651) internal successors, (1652), 1493 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1652 transitions. [2024-11-08 16:23:13,363 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1652 transitions. Word has length 81 [2024-11-08 16:23:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:23:13,363 INFO L471 AbstractCegarLoop]: Abstraction has 1494 states and 1652 transitions. [2024-11-08 16:23:13,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 2.808219178082192) internal successors, (205), 74 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:13,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1652 transitions. [2024-11-08 16:23:13,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-08 16:23:13,365 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:23:13,365 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:23:13,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-11-08 16:23:13,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:23:13,566 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:23:13,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:23:13,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1669047710, now seen corresponding path program 11 times [2024-11-08 16:23:13,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:23:13,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999274236] [2024-11-08 16:23:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:23:13,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:23:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:23:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 50 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:23:15,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:23:15,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999274236] [2024-11-08 16:23:15,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999274236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:23:15,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671612573] [2024-11-08 16:23:15,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:23:15,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:23:15,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:23:15,526 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:23:15,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-08 16:23:16,168 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-08 16:23:16,168 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:23:16,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-08 16:23:16,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:23:16,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:23:16,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:23:16,273 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 10 treesize of output 8 [2024-11-08 16:23:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 66 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:23:19,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:23:22,100 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:23:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 91 proven. 70 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:23:22,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671612573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:23:22,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:23:22,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 27] total 76 [2024-11-08 16:23:22,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77926228] [2024-11-08 16:23:22,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:23:22,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-08 16:23:22,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:23:22,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-08 16:23:22,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=5170, Unknown=0, NotChecked=0, Total=5852 [2024-11-08 16:23:22,290 INFO L87 Difference]: Start difference. First operand 1494 states and 1652 transitions. Second operand has 77 states, 76 states have (on average 3.013157894736842) internal successors, (229), 77 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:27,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:23:27,643 INFO L93 Difference]: Finished difference Result 2070 states and 2238 transitions. [2024-11-08 16:23:27,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-08 16:23:27,644 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 3.013157894736842) internal successors, (229), 77 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2024-11-08 16:23:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:23:27,647 INFO L225 Difference]: With dead ends: 2070 [2024-11-08 16:23:27,648 INFO L226 Difference]: Without dead ends: 1918 [2024-11-08 16:23:27,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3518 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1316, Invalid=9814, Unknown=0, NotChecked=0, Total=11130 [2024-11-08 16:23:27,650 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 233 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 3435 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 3499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 3435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:23:27,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1525 Invalid, 3499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 3435 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-08 16:23:27,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2024-11-08 16:23:27,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1454. [2024-11-08 16:23:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1450 states have (on average 1.1117241379310345) internal successors, (1612), 1453 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 1612 transitions. [2024-11-08 16:23:27,673 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 1612 transitions. Word has length 81 [2024-11-08 16:23:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:23:27,673 INFO L471 AbstractCegarLoop]: Abstraction has 1454 states and 1612 transitions. [2024-11-08 16:23:27,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 3.013157894736842) internal successors, (229), 77 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 1612 transitions. [2024-11-08 16:23:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-08 16:23:27,676 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:23:27,676 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:23:27,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-11-08 16:23:27,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:23:27,877 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:23:27,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:23:27,878 INFO L85 PathProgramCache]: Analyzing trace with hash 819694272, now seen corresponding path program 12 times [2024-11-08 16:23:27,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:23:27,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772358601] [2024-11-08 16:23:27,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:23:27,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:23:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:23:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 153 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:23:29,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:23:29,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772358601] [2024-11-08 16:23:29,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772358601] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:23:29,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945155240] [2024-11-08 16:23:29,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:23:29,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:23:29,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:23:29,883 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:23:29,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-08 16:23:30,550 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-08 16:23:30,550 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:23:30,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-11-08 16:23:30,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:23:31,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:23:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 12 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:23:32,182 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:23:32,250 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 16 [2024-11-08 16:23:32,254 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 20 treesize of output 16 [2024-11-08 16:23:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 12 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:23:32,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945155240] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:23:32,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:23:32,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 30] total 59 [2024-11-08 16:23:32,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849507655] [2024-11-08 16:23:32,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:23:32,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-08 16:23:32,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:23:32,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-08 16:23:32,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3253, Unknown=0, NotChecked=0, Total=3422 [2024-11-08 16:23:32,580 INFO L87 Difference]: Start difference. First operand 1454 states and 1612 transitions. Second operand has 59 states, 59 states have (on average 2.7796610169491527) internal successors, (164), 59 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:23:40,115 INFO L93 Difference]: Finished difference Result 2260 states and 2458 transitions. [2024-11-08 16:23:40,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-11-08 16:23:40,115 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.7796610169491527) internal successors, (164), 59 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2024-11-08 16:23:40,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:23:40,118 INFO L225 Difference]: With dead ends: 2260 [2024-11-08 16:23:40,118 INFO L226 Difference]: Without dead ends: 2139 [2024-11-08 16:23:40,119 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=576, Invalid=11634, Unknown=0, NotChecked=0, Total=12210 [2024-11-08 16:23:40,120 INFO L432 NwaCegarLoop]: 111 mSDtfsCounter, 266 mSDsluCounter, 4145 mSDsCounter, 0 mSdLazyCounter, 5731 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 4256 SdHoareTripleChecker+Invalid, 5782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 5731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:23:40,120 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 4256 Invalid, 5782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 5731 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-08 16:23:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2024-11-08 16:23:40,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1610. [2024-11-08 16:23:40,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1606 states have (on average 1.112079701120797) internal successors, (1786), 1609 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:40,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 1786 transitions. [2024-11-08 16:23:40,142 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 1786 transitions. Word has length 82 [2024-11-08 16:23:40,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:23:40,143 INFO L471 AbstractCegarLoop]: Abstraction has 1610 states and 1786 transitions. [2024-11-08 16:23:40,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.7796610169491527) internal successors, (164), 59 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:40,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 1786 transitions. [2024-11-08 16:23:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-08 16:23:40,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:23:40,146 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:23:40,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-08 16:23:40,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:23:40,346 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:23:40,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:23:40,347 INFO L85 PathProgramCache]: Analyzing trace with hash -170072266, now seen corresponding path program 12 times [2024-11-08 16:23:40,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:23:40,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598944334] [2024-11-08 16:23:40,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:23:40,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:23:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:23:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 91 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:23:41,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:23:41,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598944334] [2024-11-08 16:23:41,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598944334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:23:41,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199619077] [2024-11-08 16:23:41,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:23:41,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:23:41,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:23:41,888 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:23:41,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-08 16:23:42,585 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-08 16:23:42,585 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:23:42,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-11-08 16:23:42,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:23:42,732 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 10 treesize of output 8 [2024-11-08 16:23:42,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:23:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:23:45,543 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:23:48,155 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:23:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:23:48,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199619077] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:23:48,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:23:48,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 29] total 80 [2024-11-08 16:23:48,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424262116] [2024-11-08 16:23:48,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:23:48,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-08 16:23:48,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:23:48,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-08 16:23:48,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=721, Invalid=5759, Unknown=0, NotChecked=0, Total=6480 [2024-11-08 16:23:48,320 INFO L87 Difference]: Start difference. First operand 1610 states and 1786 transitions. Second operand has 81 states, 80 states have (on average 3.0875) internal successors, (247), 81 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:23:55,038 INFO L93 Difference]: Finished difference Result 2535 states and 2739 transitions. [2024-11-08 16:23:55,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-08 16:23:55,038 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 3.0875) internal successors, (247), 81 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2024-11-08 16:23:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:23:55,044 INFO L225 Difference]: With dead ends: 2535 [2024-11-08 16:23:55,044 INFO L226 Difference]: Without dead ends: 2419 [2024-11-08 16:23:55,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4429 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1614, Invalid=11726, Unknown=0, NotChecked=0, Total=13340 [2024-11-08 16:23:55,046 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 381 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 5384 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 5486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 5384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:23:55,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 1859 Invalid, 5486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 5384 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-08 16:23:55,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2024-11-08 16:23:55,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 1536. [2024-11-08 16:23:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1532 states have (on average 1.112271540469974) internal successors, (1704), 1535 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:55,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 1704 transitions. [2024-11-08 16:23:55,072 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 1704 transitions. Word has length 83 [2024-11-08 16:23:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:23:55,072 INFO L471 AbstractCegarLoop]: Abstraction has 1536 states and 1704 transitions. [2024-11-08 16:23:55,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 3.0875) internal successors, (247), 81 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 1704 transitions. [2024-11-08 16:23:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-08 16:23:55,075 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:23:55,075 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:23:55,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-11-08 16:23:55,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-11-08 16:23:55,279 INFO L396 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:23:55,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:23:55,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1894558533, now seen corresponding path program 13 times [2024-11-08 16:23:55,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:23:55,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285802759] [2024-11-08 16:23:55,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:23:55,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:23:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:23:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:23:57,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:23:57,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285802759] [2024-11-08 16:23:57,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285802759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:23:57,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084604574] [2024-11-08 16:23:57,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:23:57,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:23:57,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:23:57,474 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:23:57,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-08 16:23:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:23:57,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-08 16:23:57,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:23:58,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:23:58,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:23:58,074 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 10 treesize of output 8 [2024-11-08 16:24:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:24:00,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:24:04,346 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:24:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:24:04,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084604574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:24:04,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:24:04,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 29] total 81 [2024-11-08 16:24:04,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793787936] [2024-11-08 16:24:04,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:24:04,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-08 16:24:04,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:24:04,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-08 16:24:04,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=6099, Unknown=0, NotChecked=0, Total=6642 [2024-11-08 16:24:04,580 INFO L87 Difference]: Start difference. First operand 1536 states and 1704 transitions. Second operand has 82 states, 81 states have (on average 2.8271604938271606) internal successors, (229), 82 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:13,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:24:13,715 INFO L93 Difference]: Finished difference Result 2117 states and 2292 transitions. [2024-11-08 16:24:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-08 16:24:13,715 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 2.8271604938271606) internal successors, (229), 82 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2024-11-08 16:24:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:24:13,717 INFO L225 Difference]: With dead ends: 2117 [2024-11-08 16:24:13,717 INFO L226 Difference]: Without dead ends: 2019 [2024-11-08 16:24:13,719 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6354 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2066, Invalid=18240, Unknown=0, NotChecked=0, Total=20306 [2024-11-08 16:24:13,719 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 534 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 3864 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 3991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:24:13,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 1387 Invalid, 3991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3864 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-08 16:24:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2024-11-08 16:24:13,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1666. [2024-11-08 16:24:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1662 states have (on average 1.1077015643802648) internal successors, (1841), 1665 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 1841 transitions. [2024-11-08 16:24:13,735 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 1841 transitions. Word has length 85 [2024-11-08 16:24:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:24:13,736 INFO L471 AbstractCegarLoop]: Abstraction has 1666 states and 1841 transitions. [2024-11-08 16:24:13,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 2.8271604938271606) internal successors, (229), 82 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 1841 transitions. [2024-11-08 16:24:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-08 16:24:13,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:24:13,737 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:24:13,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-11-08 16:24:13,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:24:13,938 INFO L396 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:24:13,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:24:13,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1203083706, now seen corresponding path program 11 times [2024-11-08 16:24:13,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:24:13,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30983630] [2024-11-08 16:24:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:24:13,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:24:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:24:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:24:15,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:24:15,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30983630] [2024-11-08 16:24:15,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30983630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:24:15,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609145275] [2024-11-08 16:24:15,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:24:15,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:24:15,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:24:15,249 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:24:15,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-08 16:24:15,813 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-08 16:24:15,813 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:24:15,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-11-08 16:24:15,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:24:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 231 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:24:16,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:24:17,414 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 23 treesize of output 19 [2024-11-08 16:24:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 231 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:24:18,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609145275] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:24:18,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:24:18,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 70 [2024-11-08 16:24:18,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512410138] [2024-11-08 16:24:18,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:24:18,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-08 16:24:18,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:24:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-08 16:24:18,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=4299, Unknown=0, NotChecked=0, Total=4970 [2024-11-08 16:24:18,309 INFO L87 Difference]: Start difference. First operand 1666 states and 1841 transitions. Second operand has 71 states, 70 states have (on average 3.2142857142857144) internal successors, (225), 71 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:24:20,388 INFO L93 Difference]: Finished difference Result 2260 states and 2461 transitions. [2024-11-08 16:24:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-08 16:24:20,388 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.2142857142857144) internal successors, (225), 71 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2024-11-08 16:24:20,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:24:20,390 INFO L225 Difference]: With dead ends: 2260 [2024-11-08 16:24:20,390 INFO L226 Difference]: Without dead ends: 2230 [2024-11-08 16:24:20,390 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=711, Invalid=4401, Unknown=0, NotChecked=0, Total=5112 [2024-11-08 16:24:20,391 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 234 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 3996 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2087 SdHoareTripleChecker+Invalid, 4028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:24:20,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 2087 Invalid, 4028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3996 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-08 16:24:20,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2024-11-08 16:24:20,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1686. [2024-11-08 16:24:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1682 states have (on average 1.1076099881093935) internal successors, (1863), 1685 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 1863 transitions. [2024-11-08 16:24:20,413 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 1863 transitions. Word has length 86 [2024-11-08 16:24:20,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:24:20,414 INFO L471 AbstractCegarLoop]: Abstraction has 1686 states and 1863 transitions. [2024-11-08 16:24:20,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.2142857142857144) internal successors, (225), 71 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:20,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 1863 transitions. [2024-11-08 16:24:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-08 16:24:20,416 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:24:20,416 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:24:20,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-11-08 16:24:20,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:24:20,617 INFO L396 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:24:20,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:24:20,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1061892641, now seen corresponding path program 13 times [2024-11-08 16:24:20,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:24:20,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768153292] [2024-11-08 16:24:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:24:20,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:24:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:24:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 190 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:24:22,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:24:22,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768153292] [2024-11-08 16:24:22,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768153292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:24:22,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758246372] [2024-11-08 16:24:22,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:24:22,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:24:22,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:24:22,832 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:24:22,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-08 16:24:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:24:23,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-11-08 16:24:23,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:24:24,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:24:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:24:25,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:24:25,240 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 16 [2024-11-08 16:24:25,242 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 20 treesize of output 16 [2024-11-08 16:24:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:24:25,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758246372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:24:25,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:24:25,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 32] total 63 [2024-11-08 16:24:25,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325537745] [2024-11-08 16:24:25,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:24:25,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-08 16:24:25,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:24:25,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-08 16:24:25,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3719, Unknown=0, NotChecked=0, Total=3906 [2024-11-08 16:24:25,513 INFO L87 Difference]: Start difference. First operand 1686 states and 1863 transitions. Second operand has 63 states, 63 states have (on average 2.8095238095238093) internal successors, (177), 63 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:24:34,465 INFO L93 Difference]: Finished difference Result 2560 states and 2780 transitions. [2024-11-08 16:24:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-11-08 16:24:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.8095238095238093) internal successors, (177), 63 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2024-11-08 16:24:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:24:34,468 INFO L225 Difference]: With dead ends: 2560 [2024-11-08 16:24:34,468 INFO L226 Difference]: Without dead ends: 2433 [2024-11-08 16:24:34,469 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=638, Invalid=13404, Unknown=0, NotChecked=0, Total=14042 [2024-11-08 16:24:34,469 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 280 mSDsluCounter, 4996 mSDsCounter, 0 mSdLazyCounter, 7243 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 5113 SdHoareTripleChecker+Invalid, 7294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 7243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:24:34,469 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 5113 Invalid, 7294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 7243 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-08 16:24:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2024-11-08 16:24:34,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1830. [2024-11-08 16:24:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1826 states have (on average 1.108433734939759) internal successors, (2024), 1829 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2024 transitions. [2024-11-08 16:24:34,503 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2024 transitions. Word has length 88 [2024-11-08 16:24:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:24:34,503 INFO L471 AbstractCegarLoop]: Abstraction has 1830 states and 2024 transitions. [2024-11-08 16:24:34,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.8095238095238093) internal successors, (177), 63 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2024 transitions. [2024-11-08 16:24:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-08 16:24:34,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:24:34,505 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:24:34,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-11-08 16:24:34,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:24:34,706 INFO L396 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:24:34,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:24:34,706 INFO L85 PathProgramCache]: Analyzing trace with hash -444252273, now seen corresponding path program 11 times [2024-11-08 16:24:34,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:24:34,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593164319] [2024-11-08 16:24:34,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:24:34,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:24:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:24:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-08 16:24:35,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:24:35,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593164319] [2024-11-08 16:24:35,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593164319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:24:35,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392287752] [2024-11-08 16:24:35,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:24:35,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:24:35,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:24:35,352 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:24:35,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-08 16:24:36,229 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-08 16:24:36,229 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:24:36,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-08 16:24:36,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:24:36,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:24:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-08 16:24:36,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:24:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-08 16:24:37,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392287752] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:24:37,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:24:37,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2024-11-08 16:24:37,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574339498] [2024-11-08 16:24:37,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:24:37,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-08 16:24:37,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:24:37,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-08 16:24:37,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1473, Unknown=0, NotChecked=0, Total=1722 [2024-11-08 16:24:37,695 INFO L87 Difference]: Start difference. First operand 1830 states and 2024 transitions. Second operand has 42 states, 41 states have (on average 4.2926829268292686) internal successors, (176), 42 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:38,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:24:38,591 INFO L93 Difference]: Finished difference Result 2040 states and 2229 transitions. [2024-11-08 16:24:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-08 16:24:38,592 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.2926829268292686) internal successors, (176), 42 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2024-11-08 16:24:38,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:24:38,594 INFO L225 Difference]: With dead ends: 2040 [2024-11-08 16:24:38,594 INFO L226 Difference]: Without dead ends: 2040 [2024-11-08 16:24:38,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=307, Invalid=1949, Unknown=0, NotChecked=0, Total=2256 [2024-11-08 16:24:38,594 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 106 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 16:24:38,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 774 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 16:24:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2024-11-08 16:24:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1897. [2024-11-08 16:24:38,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1893 states have (on average 1.104067617538299) internal successors, (2090), 1896 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2090 transitions. [2024-11-08 16:24:38,619 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2090 transitions. Word has length 88 [2024-11-08 16:24:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:24:38,620 INFO L471 AbstractCegarLoop]: Abstraction has 1897 states and 2090 transitions. [2024-11-08 16:24:38,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.2926829268292686) internal successors, (176), 42 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:38,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2090 transitions. [2024-11-08 16:24:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-08 16:24:38,623 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:24:38,623 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:24:38,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-11-08 16:24:38,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:24:38,824 INFO L396 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:24:38,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:24:38,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1534460489, now seen corresponding path program 5 times [2024-11-08 16:24:38,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:24:38,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568527916] [2024-11-08 16:24:38,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:24:38,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:24:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:24:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 14 proven. 146 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:24:40,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:24:40,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568527916] [2024-11-08 16:24:40,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568527916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:24:40,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650870915] [2024-11-08 16:24:40,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:24:40,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:24:40,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:24:40,580 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:24:40,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-08 16:24:41,215 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-08 16:24:41,215 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:24:41,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-08 16:24:41,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:24:41,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:24:41,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:24:41,286 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 10 treesize of output 8 [2024-11-08 16:24:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 62 proven. 98 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:24:43,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:24:46,374 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:24:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 66 proven. 94 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:24:46,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650870915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:24:46,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:24:46,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 69 [2024-11-08 16:24:46,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291619134] [2024-11-08 16:24:46,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:24:46,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-08 16:24:46,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:24:46,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-08 16:24:46,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=4440, Unknown=0, NotChecked=0, Total=4830 [2024-11-08 16:24:46,502 INFO L87 Difference]: Start difference. First operand 1897 states and 2090 transitions. Second operand has 70 states, 69 states have (on average 3.4927536231884058) internal successors, (241), 70 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:25:36,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:25:36,356 INFO L93 Difference]: Finished difference Result 3136 states and 3369 transitions. [2024-11-08 16:25:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 343 states. [2024-11-08 16:25:36,357 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.4927536231884058) internal successors, (241), 70 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2024-11-08 16:25:36,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:25:36,359 INFO L225 Difference]: With dead ends: 3136 [2024-11-08 16:25:36,359 INFO L226 Difference]: Without dead ends: 3088 [2024-11-08 16:25:36,366 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55689 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=16703, Invalid=131907, Unknown=0, NotChecked=0, Total=148610 [2024-11-08 16:25:36,366 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 1020 mSDsluCounter, 2735 mSDsCounter, 0 mSdLazyCounter, 9086 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 9302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 9086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:25:36,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1020 Valid, 2828 Invalid, 9302 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [216 Valid, 9086 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2024-11-08 16:25:36,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2024-11-08 16:25:36,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 1810. [2024-11-08 16:25:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1806 states have (on average 1.1079734219269104) internal successors, (2001), 1809 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:25:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2001 transitions. [2024-11-08 16:25:36,395 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2001 transitions. Word has length 89 [2024-11-08 16:25:36,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:25:36,395 INFO L471 AbstractCegarLoop]: Abstraction has 1810 states and 2001 transitions. [2024-11-08 16:25:36,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.4927536231884058) internal successors, (241), 70 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:25:36,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2001 transitions. [2024-11-08 16:25:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-08 16:25:36,398 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:25:36,398 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:25:36,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2024-11-08 16:25:36,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:25:36,599 INFO L396 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:25:36,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:25:36,600 INFO L85 PathProgramCache]: Analyzing trace with hash 712310389, now seen corresponding path program 14 times [2024-11-08 16:25:36,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:25:36,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756706805] [2024-11-08 16:25:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:25:36,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:25:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:25:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 120 proven. 184 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:25:38,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:25:38,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756706805] [2024-11-08 16:25:38,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756706805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:25:38,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236516113] [2024-11-08 16:25:38,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:25:38,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:25:38,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:25:38,549 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:25:38,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-08 16:25:39,069 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:25:39,069 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:25:39,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-11-08 16:25:39,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:25:39,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:25:39,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:25:39,202 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 10 treesize of output 8 [2024-11-08 16:25:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:25:42,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:25:45,925 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:25:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:25:46,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236516113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:25:46,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:25:46,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 31] total 86 [2024-11-08 16:25:46,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756051925] [2024-11-08 16:25:46,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:25:46,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-08 16:25:46,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:25:46,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-08 16:25:46,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=6735, Unknown=0, NotChecked=0, Total=7482 [2024-11-08 16:25:46,129 INFO L87 Difference]: Start difference. First operand 1810 states and 2001 transitions. Second operand has 87 states, 86 states have (on average 3.0813953488372094) internal successors, (265), 87 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:25:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:25:55,979 INFO L93 Difference]: Finished difference Result 3065 states and 3294 transitions. [2024-11-08 16:25:55,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-08 16:25:55,980 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 3.0813953488372094) internal successors, (265), 87 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2024-11-08 16:25:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:25:55,982 INFO L225 Difference]: With dead ends: 3065 [2024-11-08 16:25:55,982 INFO L226 Difference]: Without dead ends: 2947 [2024-11-08 16:25:55,983 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4503 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1573, Invalid=14429, Unknown=0, NotChecked=0, Total=16002 [2024-11-08 16:25:55,983 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 514 mSDsluCounter, 3654 mSDsCounter, 0 mSdLazyCounter, 8317 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 3752 SdHoareTripleChecker+Invalid, 8485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 8317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:25:55,983 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 3752 Invalid, 8485 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [168 Valid, 8317 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2024-11-08 16:25:55,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2024-11-08 16:25:55,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 1808. [2024-11-08 16:25:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1804 states have (on average 1.1075388026607538) internal successors, (1998), 1807 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:25:56,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 1998 transitions. [2024-11-08 16:25:56,001 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 1998 transitions. Word has length 89 [2024-11-08 16:25:56,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:25:56,001 INFO L471 AbstractCegarLoop]: Abstraction has 1808 states and 1998 transitions. [2024-11-08 16:25:56,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 3.0813953488372094) internal successors, (265), 87 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:25:56,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 1998 transitions. [2024-11-08 16:25:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-08 16:25:56,002 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:25:56,003 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:25:56,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-11-08 16:25:56,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:25:56,203 INFO L396 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:25:56,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:25:56,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1075172534, now seen corresponding path program 15 times [2024-11-08 16:25:56,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:25:56,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725027674] [2024-11-08 16:25:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:25:56,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:25:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:25:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 71 proven. 56 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-08 16:25:57,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:25:57,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725027674] [2024-11-08 16:25:57,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725027674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:25:57,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095916543] [2024-11-08 16:25:57,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:25:57,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:25:57,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:25:57,809 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:25:57,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-11-08 16:25:58,493 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-08 16:25:58,494 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:25:58,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-08 16:25:58,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:25:58,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:25:58,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:25:58,596 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 10 treesize of output 8 [2024-11-08 16:26:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:26:02,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:26:06,170 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:26:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-08 16:26:06,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095916543] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:26:06,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:26:06,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 35, 31] total 90 [2024-11-08 16:26:06,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870413252] [2024-11-08 16:26:06,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:26:06,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-08 16:26:06,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:26:06,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-08 16:26:06,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1093, Invalid=7097, Unknown=0, NotChecked=0, Total=8190 [2024-11-08 16:26:06,380 INFO L87 Difference]: Start difference. First operand 1808 states and 1998 transitions. Second operand has 91 states, 90 states have (on average 2.688888888888889) internal successors, (242), 91 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:12,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:26:12,688 INFO L93 Difference]: Finished difference Result 2303 states and 2505 transitions. [2024-11-08 16:26:12,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-08 16:26:12,688 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 2.688888888888889) internal successors, (242), 91 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2024-11-08 16:26:12,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:26:12,691 INFO L225 Difference]: With dead ends: 2303 [2024-11-08 16:26:12,691 INFO L226 Difference]: Without dead ends: 2303 [2024-11-08 16:26:12,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7687 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=2994, Invalid=16746, Unknown=0, NotChecked=0, Total=19740 [2024-11-08 16:26:12,694 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 288 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 2924 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 3001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:26:12,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 609 Invalid, 3001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2924 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-08 16:26:12,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2024-11-08 16:26:12,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 1775. [2024-11-08 16:26:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1771 states have (on average 1.1095426312817618) internal successors, (1965), 1774 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:12,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 1965 transitions. [2024-11-08 16:26:12,721 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 1965 transitions. Word has length 91 [2024-11-08 16:26:12,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:26:12,722 INFO L471 AbstractCegarLoop]: Abstraction has 1775 states and 1965 transitions. [2024-11-08 16:26:12,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 2.688888888888889) internal successors, (242), 91 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:12,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 1965 transitions. [2024-11-08 16:26:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-08 16:26:12,726 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:26:12,726 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:26:12,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-11-08 16:26:12,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2024-11-08 16:26:12,928 INFO L396 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:26:12,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:26:12,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1586704089, now seen corresponding path program 12 times [2024-11-08 16:26:12,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:26:12,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811600433] [2024-11-08 16:26:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:26:12,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:26:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:26:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 231 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:26:14,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:26:14,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811600433] [2024-11-08 16:26:14,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811600433] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:26:14,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355318994] [2024-11-08 16:26:14,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:26:14,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:26:14,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:26:14,313 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:26:14,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-08 16:26:15,127 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-08 16:26:15,127 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:26:15,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-08 16:26:15,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:26:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 288 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:26:16,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:26:17,622 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 8 treesize of output 6 [2024-11-08 16:26:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 288 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:26:18,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355318994] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:26:18,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:26:18,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 76 [2024-11-08 16:26:18,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873114776] [2024-11-08 16:26:18,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:26:18,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-08 16:26:18,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:26:18,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-08 16:26:18,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=879, Invalid=4973, Unknown=0, NotChecked=0, Total=5852 [2024-11-08 16:26:18,205 INFO L87 Difference]: Start difference. First operand 1775 states and 1965 transitions. Second operand has 77 states, 76 states have (on average 2.75) internal successors, (209), 77 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:20,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:26:20,005 INFO L93 Difference]: Finished difference Result 2445 states and 2660 transitions. [2024-11-08 16:26:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-08 16:26:20,006 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 2.75) internal successors, (209), 77 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2024-11-08 16:26:20,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:26:20,008 INFO L225 Difference]: With dead ends: 2445 [2024-11-08 16:26:20,008 INFO L226 Difference]: Without dead ends: 2415 [2024-11-08 16:26:20,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 123 SyntacticMatches, 14 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2943 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=908, Invalid=5098, Unknown=0, NotChecked=0, Total=6006 [2024-11-08 16:26:20,009 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 404 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-08 16:26:20,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 1373 Invalid, 2771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-08 16:26:20,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2024-11-08 16:26:20,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1797. [2024-11-08 16:26:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1793 states have (on average 1.1087562744004462) internal successors, (1988), 1796 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 1988 transitions. [2024-11-08 16:26:20,027 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 1988 transitions. Word has length 92 [2024-11-08 16:26:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:26:20,028 INFO L471 AbstractCegarLoop]: Abstraction has 1797 states and 1988 transitions. [2024-11-08 16:26:20,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 2.75) internal successors, (209), 77 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:20,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 1988 transitions. [2024-11-08 16:26:20,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-08 16:26:20,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:26:20,030 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:26:20,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-11-08 16:26:20,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2024-11-08 16:26:20,230 INFO L396 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:26:20,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:26:20,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1986302142, now seen corresponding path program 14 times [2024-11-08 16:26:20,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:26:20,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799265384] [2024-11-08 16:26:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:26:20,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:26:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:26:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 231 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:26:22,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:26:22,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799265384] [2024-11-08 16:26:22,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799265384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:26:22,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416544438] [2024-11-08 16:26:22,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:26:22,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:26:22,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:26:22,927 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:26:22,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-08 16:26:23,453 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:26:23,453 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:26:23,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-11-08 16:26:23,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:26:24,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:26:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 14 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:26:25,541 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:26:25,649 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 16 [2024-11-08 16:26:25,652 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 20 treesize of output 16 [2024-11-08 16:26:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 14 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:26:25,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416544438] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:26:25,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:26:25,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 34, 34] total 67 [2024-11-08 16:26:25,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839331126] [2024-11-08 16:26:25,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:26:25,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-08 16:26:25,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:26:25,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-08 16:26:25,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4216, Unknown=0, NotChecked=0, Total=4422 [2024-11-08 16:26:25,940 INFO L87 Difference]: Start difference. First operand 1797 states and 1988 transitions. Second operand has 67 states, 67 states have (on average 2.8208955223880596) internal successors, (189), 67 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:26:35,504 INFO L93 Difference]: Finished difference Result 2769 states and 3003 transitions. [2024-11-08 16:26:35,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-11-08 16:26:35,505 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.8208955223880596) internal successors, (189), 67 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-11-08 16:26:35,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:26:35,507 INFO L225 Difference]: With dead ends: 2769 [2024-11-08 16:26:35,507 INFO L226 Difference]: Without dead ends: 2636 [2024-11-08 16:26:35,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2950 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=703, Invalid=15299, Unknown=0, NotChecked=0, Total=16002 [2024-11-08 16:26:35,508 INFO L432 NwaCegarLoop]: 122 mSDtfsCounter, 287 mSDsluCounter, 5400 mSDsCounter, 0 mSdLazyCounter, 7718 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 5522 SdHoareTripleChecker+Invalid, 7773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 7718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:26:35,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 5522 Invalid, 7773 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [55 Valid, 7718 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-08 16:26:35,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2024-11-08 16:26:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1945. [2024-11-08 16:26:35,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1941 states have (on average 1.1092220504894383) internal successors, (2153), 1944 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:35,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 2153 transitions. [2024-11-08 16:26:35,525 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 2153 transitions. Word has length 94 [2024-11-08 16:26:35,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:26:35,525 INFO L471 AbstractCegarLoop]: Abstraction has 1945 states and 2153 transitions. [2024-11-08 16:26:35,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.8208955223880596) internal successors, (189), 67 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 2153 transitions. [2024-11-08 16:26:35,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-08 16:26:35,527 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:26:35,528 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:26:35,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-11-08 16:26:35,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2024-11-08 16:26:35,728 INFO L396 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:26:35,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:26:35,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1477082977, now seen corresponding path program 12 times [2024-11-08 16:26:35,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:26:35,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884937149] [2024-11-08 16:26:35,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:26:35,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:26:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:26:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 50 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:26:37,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:26:37,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884937149] [2024-11-08 16:26:37,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884937149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:26:37,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723771121] [2024-11-08 16:26:37,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:26:37,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:26:37,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:26:37,479 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:26:37,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-11-08 16:26:38,364 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-08 16:26:38,364 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:26:38,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-11-08 16:26:38,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:26:39,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 16:26:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 18 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:26:40,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:26:40,589 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 15 treesize of output 13 [2024-11-08 16:26:40,591 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 16 treesize of output 12 [2024-11-08 16:26:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-08 16:26:41,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723771121] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:26:41,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:26:41,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 33, 20] total 64 [2024-11-08 16:26:41,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429372972] [2024-11-08 16:26:41,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:26:41,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-08 16:26:41,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:26:41,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-08 16:26:41,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=3779, Unknown=0, NotChecked=0, Total=4032 [2024-11-08 16:26:41,171 INFO L87 Difference]: Start difference. First operand 1945 states and 2153 transitions. Second operand has 64 states, 64 states have (on average 3.265625) internal successors, (209), 64 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:44,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:26:44,528 INFO L93 Difference]: Finished difference Result 2954 states and 3257 transitions. [2024-11-08 16:26:44,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-08 16:26:44,528 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.265625) internal successors, (209), 64 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-11-08 16:26:44,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:26:44,531 INFO L225 Difference]: With dead ends: 2954 [2024-11-08 16:26:44,531 INFO L226 Difference]: Without dead ends: 2460 [2024-11-08 16:26:44,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=472, Invalid=6668, Unknown=0, NotChecked=0, Total=7140 [2024-11-08 16:26:44,533 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 63 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 3515 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 3535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:26:44,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1515 Invalid, 3535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3515 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-08 16:26:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2024-11-08 16:26:44,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2186. [2024-11-08 16:26:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2182 states have (on average 1.1072410632447296) internal successors, (2416), 2185 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 2416 transitions. [2024-11-08 16:26:44,552 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 2416 transitions. Word has length 94 [2024-11-08 16:26:44,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:26:44,552 INFO L471 AbstractCegarLoop]: Abstraction has 2186 states and 2416 transitions. [2024-11-08 16:26:44,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.265625) internal successors, (209), 64 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 2416 transitions. [2024-11-08 16:26:44,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-08 16:26:44,554 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:26:44,554 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:26:44,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-11-08 16:26:44,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2024-11-08 16:26:44,755 INFO L396 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:26:44,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:26:44,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1309894668, now seen corresponding path program 16 times [2024-11-08 16:26:44,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:26:44,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327360077] [2024-11-08 16:26:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:26:44,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:26:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:26:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 153 proven. 214 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:26:46,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:26:46,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327360077] [2024-11-08 16:26:46,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327360077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:26:46,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176549099] [2024-11-08 16:26:46,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:26:46,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:26:46,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:26:46,724 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:26:46,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-08 16:26:47,456 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:26:47,456 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:26:47,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 149 conjuncts are in the unsatisfiable core [2024-11-08 16:26:47,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:26:47,564 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 10 treesize of output 8 [2024-11-08 16:26:47,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:26:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 181 proven. 186 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:26:52,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:26:55,478 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:26:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 231 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:26:55,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176549099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:26:55,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:26:55,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 31] total 90 [2024-11-08 16:26:55,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958564612] [2024-11-08 16:26:55,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:26:55,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-08 16:26:55,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:26:55,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-08 16:26:55,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=7287, Unknown=0, NotChecked=0, Total=8190 [2024-11-08 16:26:55,730 INFO L87 Difference]: Start difference. First operand 2186 states and 2416 transitions. Second operand has 91 states, 90 states have (on average 3.1444444444444444) internal successors, (283), 91 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:27:04,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:27:04,549 INFO L93 Difference]: Finished difference Result 3790 states and 4081 transitions. [2024-11-08 16:27:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-08 16:27:04,550 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 3.1444444444444444) internal successors, (283), 91 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2024-11-08 16:27:04,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:27:04,553 INFO L225 Difference]: With dead ends: 3790 [2024-11-08 16:27:04,554 INFO L226 Difference]: Without dead ends: 3656 [2024-11-08 16:27:04,555 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5203 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=2147, Invalid=14883, Unknown=0, NotChecked=0, Total=17030 [2024-11-08 16:27:04,556 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 535 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 6087 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 1993 SdHoareTripleChecker+Invalid, 6231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 6087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:27:04,556 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 1993 Invalid, 6231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 6087 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-08 16:27:04,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2024-11-08 16:27:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 2366. [2024-11-08 16:27:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2362 states have (on average 1.1058425063505504) internal successors, (2612), 2365 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:27:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 2612 transitions. [2024-11-08 16:27:04,595 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 2612 transitions. Word has length 95 [2024-11-08 16:27:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:27:04,595 INFO L471 AbstractCegarLoop]: Abstraction has 2366 states and 2612 transitions. [2024-11-08 16:27:04,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 3.1444444444444444) internal successors, (283), 91 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:27:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 2612 transitions. [2024-11-08 16:27:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-08 16:27:04,599 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:27:04,599 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:27:04,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2024-11-08 16:27:04,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2024-11-08 16:27:04,800 INFO L396 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:27:04,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash -221681277, now seen corresponding path program 17 times [2024-11-08 16:27:04,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:04,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191833238] [2024-11-08 16:27:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:04,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:27:07,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:07,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191833238] [2024-11-08 16:27:07,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191833238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:07,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052930751] [2024-11-08 16:27:07,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:27:07,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:07,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:27:07,867 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:27:07,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-11-08 16:27:08,728 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-08 16:27:08,728 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:27:08,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-11-08 16:27:08,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:27:08,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:27:08,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:27:08,877 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 10 treesize of output 8 [2024-11-08 16:27:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 91 proven. 131 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:27:13,473 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:27:18,877 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:27:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 120 proven. 102 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:27:19,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052930751] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:27:19,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:27:19,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 31] total 89 [2024-11-08 16:27:19,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349639148] [2024-11-08 16:27:19,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:27:19,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2024-11-08 16:27:19,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:19,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2024-11-08 16:27:19,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=7414, Unknown=0, NotChecked=0, Total=8010 [2024-11-08 16:27:19,224 INFO L87 Difference]: Start difference. First operand 2366 states and 2612 transitions. Second operand has 90 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 90 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:27:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:27:38,375 INFO L93 Difference]: Finished difference Result 3451 states and 3720 transitions. [2024-11-08 16:27:38,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2024-11-08 16:27:38,375 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 90 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2024-11-08 16:27:38,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:27:38,378 INFO L225 Difference]: With dead ends: 3451 [2024-11-08 16:27:38,378 INFO L226 Difference]: Without dead ends: 3167 [2024-11-08 16:27:38,380 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7487 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=3103, Invalid=29477, Unknown=0, NotChecked=0, Total=32580 [2024-11-08 16:27:38,380 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 505 mSDsluCounter, 2933 mSDsCounter, 0 mSdLazyCounter, 7359 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 3005 SdHoareTripleChecker+Invalid, 7556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 7359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:27:38,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 3005 Invalid, 7556 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [197 Valid, 7359 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2024-11-08 16:27:38,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2024-11-08 16:27:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 2440. [2024-11-08 16:27:38,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2436 states have (on average 1.1030377668308702) internal successors, (2687), 2439 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:27:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 2687 transitions. [2024-11-08 16:27:38,403 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 2687 transitions. Word has length 97 [2024-11-08 16:27:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:27:38,403 INFO L471 AbstractCegarLoop]: Abstraction has 2440 states and 2687 transitions. [2024-11-08 16:27:38,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 90 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:27:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 2687 transitions. [2024-11-08 16:27:38,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-08 16:27:38,406 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:27:38,406 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:27:38,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2024-11-08 16:27:38,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2024-11-08 16:27:38,607 INFO L396 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:27:38,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:38,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1261384136, now seen corresponding path program 13 times [2024-11-08 16:27:38,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:38,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865459192] [2024-11-08 16:27:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:38,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 276 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:27:40,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:40,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865459192] [2024-11-08 16:27:40,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865459192] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:40,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399338086] [2024-11-08 16:27:40,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:27:40,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:40,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:27:40,105 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:27:40,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-11-08 16:27:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:40,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-08 16:27:40,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:27:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 325 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:27:41,554 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:27:42,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-08 16:27:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 325 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:27:43,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399338086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:27:43,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:27:43,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 67 [2024-11-08 16:27:43,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032962417] [2024-11-08 16:27:43,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:27:43,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-08 16:27:43,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:43,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-08 16:27:43,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=4002, Unknown=0, NotChecked=0, Total=4556 [2024-11-08 16:27:43,126 INFO L87 Difference]: Start difference. First operand 2440 states and 2687 transitions. Second operand has 68 states, 67 states have (on average 2.925373134328358) internal successors, (196), 68 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:27:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:27:46,135 INFO L93 Difference]: Finished difference Result 3242 states and 3520 transitions. [2024-11-08 16:27:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-08 16:27:46,135 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.925373134328358) internal successors, (196), 68 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2024-11-08 16:27:46,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:27:46,138 INFO L225 Difference]: With dead ends: 3242 [2024-11-08 16:27:46,138 INFO L226 Difference]: Without dead ends: 3206 [2024-11-08 16:27:46,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 145 SyntacticMatches, 15 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2362 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=585, Invalid=4107, Unknown=0, NotChecked=0, Total=4692 [2024-11-08 16:27:46,139 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 405 mSDsluCounter, 2275 mSDsCounter, 0 mSdLazyCounter, 4476 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 2375 SdHoareTripleChecker+Invalid, 4534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 4476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:27:46,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 2375 Invalid, 4534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 4476 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-08 16:27:46,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2024-11-08 16:27:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 2531. [2024-11-08 16:27:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2527 states have (on average 1.0997229916897506) internal successors, (2779), 2530 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:27:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 2779 transitions. [2024-11-08 16:27:46,162 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 2779 transitions. Word has length 98 [2024-11-08 16:27:46,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:27:46,163 INFO L471 AbstractCegarLoop]: Abstraction has 2531 states and 2779 transitions. [2024-11-08 16:27:46,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.925373134328358) internal successors, (196), 68 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:27:46,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 2779 transitions. [2024-11-08 16:27:46,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-08 16:27:46,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:27:46,165 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:27:46,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-11-08 16:27:46,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:46,366 INFO L396 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:27:46,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:46,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1422909283, now seen corresponding path program 18 times [2024-11-08 16:27:46,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:46,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388609168] [2024-11-08 16:27:46,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:46,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 16:27:48,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:48,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388609168] [2024-11-08 16:27:48,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388609168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:48,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118993047] [2024-11-08 16:27:48,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:27:48,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:48,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:27:48,696 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:27:48,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-11-08 16:27:49,903 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-08 16:27:49,903 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:27:49,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-08 16:27:49,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:27:50,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:27:50,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:27:50,088 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 10 treesize of output 8 [2024-11-08 16:27:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 16:27:54,572 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:27:59,228 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:27:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 91 proven. 94 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 16:27:59,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118993047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:27:59,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:27:59,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 31] total 87 [2024-11-08 16:27:59,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304290431] [2024-11-08 16:27:59,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:27:59,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-08 16:27:59,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:59,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-08 16:27:59,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=6930, Unknown=0, NotChecked=0, Total=7656 [2024-11-08 16:27:59,501 INFO L87 Difference]: Start difference. First operand 2531 states and 2779 transitions. Second operand has 88 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 88 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:28:15,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:28:15,399 INFO L93 Difference]: Finished difference Result 3139 states and 3389 transitions. [2024-11-08 16:28:15,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2024-11-08 16:28:15,399 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 88 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2024-11-08 16:28:15,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:28:15,401 INFO L225 Difference]: With dead ends: 3139 [2024-11-08 16:28:15,401 INFO L226 Difference]: Without dead ends: 2915 [2024-11-08 16:28:15,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9450 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=4016, Invalid=27846, Unknown=0, NotChecked=0, Total=31862 [2024-11-08 16:28:15,403 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 621 mSDsluCounter, 1688 mSDsCounter, 0 mSdLazyCounter, 4859 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 5084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 4859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:28:15,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 1742 Invalid, 5084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 4859 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-08 16:28:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2024-11-08 16:28:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 2308. [2024-11-08 16:28:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2304 states have (on average 1.1063368055555556) internal successors, (2549), 2307 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:28:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 2549 transitions. [2024-11-08 16:28:15,424 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 2549 transitions. Word has length 99 [2024-11-08 16:28:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:28:15,424 INFO L471 AbstractCegarLoop]: Abstraction has 2308 states and 2549 transitions. [2024-11-08 16:28:15,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 88 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:28:15,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 2549 transitions. [2024-11-08 16:28:15,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-08 16:28:15,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:28:15,426 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:28:15,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2024-11-08 16:28:15,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:15,627 INFO L396 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:28:15,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:28:15,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2066108963, now seen corresponding path program 15 times [2024-11-08 16:28:15,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:28:15,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021440222] [2024-11-08 16:28:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:15,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:28:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 276 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:28:18,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:28:18,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021440222] [2024-11-08 16:28:18,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021440222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:28:18,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487209835] [2024-11-08 16:28:18,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:28:18,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:18,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:28:18,119 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:28:18,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-11-08 16:28:19,131 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-08 16:28:19,132 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:28:19,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-11-08 16:28:19,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:28:20,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:28:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 15 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:28:21,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:28:21,572 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 16 [2024-11-08 16:28:21,574 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 20 treesize of output 16 [2024-11-08 16:28:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 15 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:28:21,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487209835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:28:21,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:28:21,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36, 36] total 71 [2024-11-08 16:28:21,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737858244] [2024-11-08 16:28:21,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:28:21,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-08 16:28:21,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:28:21,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-08 16:28:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=4744, Unknown=0, NotChecked=0, Total=4970 [2024-11-08 16:28:21,880 INFO L87 Difference]: Start difference. First operand 2308 states and 2549 transitions. Second operand has 71 states, 71 states have (on average 2.816901408450704) internal successors, (200), 71 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:28:32,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:28:32,577 INFO L93 Difference]: Finished difference Result 3440 states and 3736 transitions. [2024-11-08 16:28:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-11-08 16:28:32,578 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.816901408450704) internal successors, (200), 71 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2024-11-08 16:28:32,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:28:32,581 INFO L225 Difference]: With dead ends: 3440 [2024-11-08 16:28:32,582 INFO L226 Difference]: Without dead ends: 3301 [2024-11-08 16:28:32,583 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3371 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=771, Invalid=17319, Unknown=0, NotChecked=0, Total=18090 [2024-11-08 16:28:32,587 INFO L432 NwaCegarLoop]: 128 mSDtfsCounter, 291 mSDsluCounter, 6037 mSDsCounter, 0 mSdLazyCounter, 8657 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 6165 SdHoareTripleChecker+Invalid, 8720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 8657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:28:32,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 6165 Invalid, 8720 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [63 Valid, 8657 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-08 16:28:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3301 states. [2024-11-08 16:28:32,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3301 to 2472. [2024-11-08 16:28:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2468 states have (on average 1.1073743922204213) internal successors, (2733), 2471 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:28:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 2733 transitions. [2024-11-08 16:28:32,627 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 2733 transitions. Word has length 100 [2024-11-08 16:28:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:28:32,627 INFO L471 AbstractCegarLoop]: Abstraction has 2472 states and 2733 transitions. [2024-11-08 16:28:32,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.816901408450704) internal successors, (200), 71 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:28:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 2733 transitions. [2024-11-08 16:28:32,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-08 16:28:32,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:28:32,630 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:28:32,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-11-08 16:28:32,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:32,831 INFO L396 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:28:32,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:28:32,831 INFO L85 PathProgramCache]: Analyzing trace with hash 609470207, now seen corresponding path program 6 times [2024-11-08 16:28:32,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:28:32,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398547870] [2024-11-08 16:28:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:32,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:28:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 190 proven. 245 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:28:35,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:28:35,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398547870] [2024-11-08 16:28:35,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398547870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:28:35,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172242362] [2024-11-08 16:28:35,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:28:35,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:35,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:28:35,302 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:28:35,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-11-08 16:28:36,733 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-08 16:28:36,733 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:28:36,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 162 conjuncts are in the unsatisfiable core [2024-11-08 16:28:36,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:28:36,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:28:36,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:28:36,765 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 10 treesize of output 8 [2024-11-08 16:28:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:28:40,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:28:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:28:44,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172242362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:28:44,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:28:44,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 33] total 95 [2024-11-08 16:28:44,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938420180] [2024-11-08 16:28:44,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:28:44,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-08 16:28:44,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:28:44,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-08 16:28:44,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=8437, Unknown=0, NotChecked=0, Total=9120 [2024-11-08 16:28:44,741 INFO L87 Difference]: Start difference. First operand 2472 states and 2733 transitions. Second operand has 96 states, 95 states have (on average 3.094736842105263) internal successors, (294), 96 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:01,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:29:01,565 INFO L93 Difference]: Finished difference Result 3431 states and 3720 transitions. [2024-11-08 16:29:01,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2024-11-08 16:29:01,566 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 3.094736842105263) internal successors, (294), 96 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2024-11-08 16:29:01,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:29:01,568 INFO L225 Difference]: With dead ends: 3431 [2024-11-08 16:29:01,568 INFO L226 Difference]: Without dead ends: 3387 [2024-11-08 16:29:01,570 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10922 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=3766, Invalid=40544, Unknown=0, NotChecked=0, Total=44310 [2024-11-08 16:29:01,571 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 659 mSDsluCounter, 2325 mSDsCounter, 0 mSdLazyCounter, 5900 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 2402 SdHoareTripleChecker+Invalid, 6007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 5900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:29:01,571 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 2402 Invalid, 6007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 5900 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-08 16:29:01,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3387 states. [2024-11-08 16:29:01,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3387 to 2508. [2024-11-08 16:29:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2504 states have (on average 1.1050319488817892) internal successors, (2767), 2507 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:01,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 2767 transitions. [2024-11-08 16:29:01,595 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 2767 transitions. Word has length 101 [2024-11-08 16:29:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:29:01,595 INFO L471 AbstractCegarLoop]: Abstraction has 2508 states and 2767 transitions. [2024-11-08 16:29:01,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 3.094736842105263) internal successors, (294), 96 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:01,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 2767 transitions. [2024-11-08 16:29:01,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-08 16:29:01,598 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:29:01,598 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:29:01,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-11-08 16:29:01,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2024-11-08 16:29:01,799 INFO L396 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:29:01,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:29:01,799 INFO L85 PathProgramCache]: Analyzing trace with hash 334855985, now seen corresponding path program 13 times [2024-11-08 16:29:01,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:29:01,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600202561] [2024-11-08 16:29:01,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:29:01,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:29:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:29:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-08 16:29:02,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:29:02,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600202561] [2024-11-08 16:29:02,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600202561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:29:02,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054538885] [2024-11-08 16:29:02,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:29:02,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:29:02,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:29:02,784 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:29:02,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-11-08 16:29:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:29:03,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-08 16:29:03,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:29:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 45 proven. 129 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-08 16:29:03,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:29:04,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-08 16:29:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 45 proven. 129 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-08 16:29:04,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054538885] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:29:04,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:29:04,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 39 [2024-11-08 16:29:04,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589665510] [2024-11-08 16:29:04,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:29:04,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-08 16:29:04,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:29:04,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-08 16:29:04,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1383, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 16:29:04,597 INFO L87 Difference]: Start difference. First operand 2508 states and 2767 transitions. Second operand has 40 states, 39 states have (on average 4.256410256410256) internal successors, (166), 40 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:05,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:29:05,865 INFO L93 Difference]: Finished difference Result 2728 states and 2984 transitions. [2024-11-08 16:29:05,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-08 16:29:05,866 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.256410256410256) internal successors, (166), 40 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2024-11-08 16:29:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:29:05,868 INFO L225 Difference]: With dead ends: 2728 [2024-11-08 16:29:05,868 INFO L226 Difference]: Without dead ends: 2728 [2024-11-08 16:29:05,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 176 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=241, Invalid=1921, Unknown=0, NotChecked=0, Total=2162 [2024-11-08 16:29:05,868 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 86 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:29:05,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1014 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1569 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-08 16:29:05,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2024-11-08 16:29:05,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2569. [2024-11-08 16:29:05,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2569 states, 2565 states have (on average 1.102923976608187) internal successors, (2829), 2568 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:05,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 2829 transitions. [2024-11-08 16:29:05,901 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 2829 transitions. Word has length 102 [2024-11-08 16:29:05,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:29:05,902 INFO L471 AbstractCegarLoop]: Abstraction has 2569 states and 2829 transitions. [2024-11-08 16:29:05,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.256410256410256) internal successors, (166), 40 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:05,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 2829 transitions. [2024-11-08 16:29:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-08 16:29:05,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:29:05,906 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:29:05,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-11-08 16:29:06,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:29:06,106 INFO L396 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:29:06,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:29:06,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1539057842, now seen corresponding path program 7 times [2024-11-08 16:29:06,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:29:06,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336508747] [2024-11-08 16:29:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:29:06,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:29:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:29:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 14 proven. 256 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:29:08,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:29:08,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336508747] [2024-11-08 16:29:08,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336508747] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:29:08,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98921182] [2024-11-08 16:29:08,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:29:08,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:29:08,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:29:08,493 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:29:08,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-11-08 16:29:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:29:09,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-08 16:29:09,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:29:09,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:29:09,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:29:09,160 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 10 treesize of output 8 [2024-11-08 16:29:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:29:12,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:29:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:29:15,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98921182] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:29:15,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:29:15,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 30] total 86 [2024-11-08 16:29:15,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304916161] [2024-11-08 16:29:15,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:29:15,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-08 16:29:15,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:29:15,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-08 16:29:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=6802, Unknown=0, NotChecked=0, Total=7482 [2024-11-08 16:29:15,764 INFO L87 Difference]: Start difference. First operand 2569 states and 2829 transitions. Second operand has 87 states, 86 states have (on average 3.1511627906976742) internal successors, (271), 87 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:29:30,155 INFO L93 Difference]: Finished difference Result 3784 states and 4104 transitions. [2024-11-08 16:29:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2024-11-08 16:29:30,155 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 3.1511627906976742) internal successors, (271), 87 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-11-08 16:29:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:29:30,158 INFO L225 Difference]: With dead ends: 3784 [2024-11-08 16:29:30,158 INFO L226 Difference]: Without dead ends: 3710 [2024-11-08 16:29:30,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10694 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=3273, Invalid=34169, Unknown=0, NotChecked=0, Total=37442 [2024-11-08 16:29:30,160 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 872 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 6091 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 6317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 6091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:29:30,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [872 Valid, 2376 Invalid, 6317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 6091 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-08 16:29:30,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2024-11-08 16:29:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 2536. [2024-11-08 16:29:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2532 states have (on average 1.103080568720379) internal successors, (2793), 2535 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 2793 transitions. [2024-11-08 16:29:30,179 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 2793 transitions. Word has length 103 [2024-11-08 16:29:30,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:29:30,180 INFO L471 AbstractCegarLoop]: Abstraction has 2536 states and 2793 transitions. [2024-11-08 16:29:30,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 3.1511627906976742) internal successors, (271), 87 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 2793 transitions. [2024-11-08 16:29:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-08 16:29:30,182 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:29:30,182 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:29:30,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2024-11-08 16:29:30,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:29:30,382 INFO L396 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:29:30,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:29:30,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1411147735, now seen corresponding path program 14 times [2024-11-08 16:29:30,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:29:30,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751499779] [2024-11-08 16:29:30,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:29:30,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:29:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:29:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 325 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:29:32,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:29:32,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751499779] [2024-11-08 16:29:32,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751499779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:29:32,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485286755] [2024-11-08 16:29:32,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:29:32,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:29:32,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:29:32,083 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:29:32,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-11-08 16:29:32,743 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:29:32,744 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:29:32,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 154 conjuncts are in the unsatisfiable core [2024-11-08 16:29:32,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:29:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 378 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:29:33,845 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:29:34,888 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 23 treesize of output 19 [2024-11-08 16:29:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 378 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:29:36,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485286755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:29:36,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:29:36,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 85 [2024-11-08 16:29:36,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081773184] [2024-11-08 16:29:36,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:29:36,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-08 16:29:36,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:29:36,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-08 16:29:36,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=989, Invalid=6321, Unknown=0, NotChecked=0, Total=7310 [2024-11-08 16:29:36,092 INFO L87 Difference]: Start difference. First operand 2536 states and 2793 transitions. Second operand has 86 states, 85 states have (on average 3.211764705882353) internal successors, (273), 86 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:39,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:29:39,249 INFO L93 Difference]: Finished difference Result 3445 states and 3737 transitions. [2024-11-08 16:29:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-08 16:29:39,249 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 3.211764705882353) internal successors, (273), 86 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2024-11-08 16:29:39,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:29:39,252 INFO L225 Difference]: With dead ends: 3445 [2024-11-08 16:29:39,252 INFO L226 Difference]: Without dead ends: 3409 [2024-11-08 16:29:39,253 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1038, Invalid=6444, Unknown=0, NotChecked=0, Total=7482 [2024-11-08 16:29:39,253 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 624 mSDsluCounter, 2621 mSDsCounter, 0 mSdLazyCounter, 4881 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 2725 SdHoareTripleChecker+Invalid, 4991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 4881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:29:39,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 2725 Invalid, 4991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 4881 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-08 16:29:39,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2024-11-08 16:29:39,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 2608. [2024-11-08 16:29:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2608 states, 2604 states have (on average 1.1006144393241168) internal successors, (2866), 2607 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2608 states to 2608 states and 2866 transitions. [2024-11-08 16:29:39,290 INFO L78 Accepts]: Start accepts. Automaton has 2608 states and 2866 transitions. Word has length 104 [2024-11-08 16:29:39,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:29:39,290 INFO L471 AbstractCegarLoop]: Abstraction has 2608 states and 2866 transitions. [2024-11-08 16:29:39,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 3.211764705882353) internal successors, (273), 86 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2608 states and 2866 transitions. [2024-11-08 16:29:39,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-08 16:29:39,294 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:29:39,294 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:29:39,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2024-11-08 16:29:39,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:29:39,495 INFO L396 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:29:39,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:29:39,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1331565884, now seen corresponding path program 16 times [2024-11-08 16:29:39,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:29:39,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967160974] [2024-11-08 16:29:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:29:39,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:29:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:29:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 325 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:29:42,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:29:42,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967160974] [2024-11-08 16:29:42,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967160974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:29:42,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324780846] [2024-11-08 16:29:42,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:29:42,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:29:42,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:29:42,167 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:29:42,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-11-08 16:29:43,272 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:29:43,272 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:29:43,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 170 conjuncts are in the unsatisfiable core [2024-11-08 16:29:43,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:29:44,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:29:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 16 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:29:45,908 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:29:45,985 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 16 [2024-11-08 16:29:45,987 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 20 treesize of output 16 [2024-11-08 16:29:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 16 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:29:46,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324780846] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:29:46,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:29:46,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38, 38] total 75 [2024-11-08 16:29:46,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034303672] [2024-11-08 16:29:46,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:29:46,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-08 16:29:46,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:29:46,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-08 16:29:46,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=5303, Unknown=0, NotChecked=0, Total=5550 [2024-11-08 16:29:46,303 INFO L87 Difference]: Start difference. First operand 2608 states and 2866 transitions. Second operand has 75 states, 75 states have (on average 2.84) internal successors, (213), 75 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:58,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:29:58,384 INFO L93 Difference]: Finished difference Result 3838 states and 4149 transitions. [2024-11-08 16:29:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2024-11-08 16:29:58,385 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.84) internal successors, (213), 75 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2024-11-08 16:29:58,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:29:58,388 INFO L225 Difference]: With dead ends: 3838 [2024-11-08 16:29:58,388 INFO L226 Difference]: Without dead ends: 3693 [2024-11-08 16:29:58,389 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=842, Invalid=19464, Unknown=0, NotChecked=0, Total=20306 [2024-11-08 16:29:58,389 INFO L432 NwaCegarLoop]: 133 mSDtfsCounter, 314 mSDsluCounter, 6602 mSDsCounter, 0 mSdLazyCounter, 9664 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 6735 SdHoareTripleChecker+Invalid, 9727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 9664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:29:58,390 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 6735 Invalid, 9727 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [63 Valid, 9664 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-11-08 16:29:58,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3693 states. [2024-11-08 16:29:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3693 to 2776. [2024-11-08 16:29:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2772 states have (on average 1.1017316017316017) internal successors, (3054), 2775 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:58,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 3054 transitions. [2024-11-08 16:29:58,416 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 3054 transitions. Word has length 106 [2024-11-08 16:29:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:29:58,417 INFO L471 AbstractCegarLoop]: Abstraction has 2776 states and 3054 transitions. [2024-11-08 16:29:58,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.84) internal successors, (213), 75 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:29:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 3054 transitions. [2024-11-08 16:29:58,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-08 16:29:58,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:29:58,420 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:29:58,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2024-11-08 16:29:58,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:29:58,621 INFO L396 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:29:58,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:29:58,621 INFO L85 PathProgramCache]: Analyzing trace with hash 702419378, now seen corresponding path program 19 times [2024-11-08 16:29:58,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:29:58,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240131007] [2024-11-08 16:29:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:29:58,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:29:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:30:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 231 proven. 280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:30:00,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:30:00,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240131007] [2024-11-08 16:30:00,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240131007] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:30:00,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045924285] [2024-11-08 16:30:00,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:30:00,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:30:00,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:30:00,925 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:30:00,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-11-08 16:30:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:30:01,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-08 16:30:01,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:30:01,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:30:01,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:30:01,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-08 16:30:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 276 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:30:04,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:30:07,926 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:30:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 325 proven. 186 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:30:08,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045924285] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:30:08,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:30:08,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 96 [2024-11-08 16:30:08,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776588981] [2024-11-08 16:30:08,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:30:08,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-08 16:30:08,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:30:08,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-08 16:30:08,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=8429, Unknown=0, NotChecked=0, Total=9312 [2024-11-08 16:30:08,124 INFO L87 Difference]: Start difference. First operand 2776 states and 3054 transitions. Second operand has 97 states, 96 states have (on average 3.3229166666666665) internal successors, (319), 97 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:30:13,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:30:13,385 INFO L93 Difference]: Finished difference Result 4167 states and 4503 transitions. [2024-11-08 16:30:13,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-08 16:30:13,385 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 3.3229166666666665) internal successors, (319), 97 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2024-11-08 16:30:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:30:13,389 INFO L225 Difference]: With dead ends: 4167 [2024-11-08 16:30:13,389 INFO L226 Difference]: Without dead ends: 4099 [2024-11-08 16:30:13,390 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3367 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1402, Invalid=11030, Unknown=0, NotChecked=0, Total=12432 [2024-11-08 16:30:13,390 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 338 mSDsluCounter, 3097 mSDsCounter, 0 mSdLazyCounter, 5819 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 3190 SdHoareTripleChecker+Invalid, 5859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 5819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:30:13,390 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 3190 Invalid, 5859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 5819 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-08 16:30:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2024-11-08 16:30:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 2855. [2024-11-08 16:30:13,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2855 states, 2851 states have (on average 1.1013679410733077) internal successors, (3140), 2854 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:30:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 3140 transitions. [2024-11-08 16:30:13,420 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 3140 transitions. Word has length 107 [2024-11-08 16:30:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:30:13,420 INFO L471 AbstractCegarLoop]: Abstraction has 2855 states and 3140 transitions. [2024-11-08 16:30:13,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 3.3229166666666665) internal successors, (319), 97 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:30:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 3140 transitions. [2024-11-08 16:30:13,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-08 16:30:13,423 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:30:13,424 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:30:13,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2024-11-08 16:30:13,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:30:13,624 INFO L396 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:30:13,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:30:13,625 INFO L85 PathProgramCache]: Analyzing trace with hash 348192131, now seen corresponding path program 14 times [2024-11-08 16:30:13,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:30:13,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316299849] [2024-11-08 16:30:13,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:30:13,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:30:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:30:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 70 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:30:15,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:30:15,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316299849] [2024-11-08 16:30:15,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316299849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:30:15,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189335037] [2024-11-08 16:30:15,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:30:15,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:30:15,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:30:15,668 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:30:15,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-11-08 16:30:16,350 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:30:16,350 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:30:16,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-08 16:30:16,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:30:16,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:30:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 21 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-08 16:30:16,958 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:30:17,043 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 15 treesize of output 13 [2024-11-08 16:30:17,045 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 16 treesize of output 12 [2024-11-08 16:30:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 21 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-08 16:30:17,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189335037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:30:17,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:30:17,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 22, 22] total 44 [2024-11-08 16:30:17,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384521270] [2024-11-08 16:30:17,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:30:17,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-08 16:30:17,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:30:17,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-08 16:30:17,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1770, Unknown=0, NotChecked=0, Total=1892 [2024-11-08 16:30:17,208 INFO L87 Difference]: Start difference. First operand 2855 states and 3140 transitions. Second operand has 44 states, 44 states have (on average 3.5) internal successors, (154), 44 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:30:20,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:30:20,395 INFO L93 Difference]: Finished difference Result 4142 states and 4550 transitions. [2024-11-08 16:30:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-08 16:30:20,396 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.5) internal successors, (154), 44 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2024-11-08 16:30:20,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:30:20,399 INFO L225 Difference]: With dead ends: 4142 [2024-11-08 16:30:20,399 INFO L226 Difference]: Without dead ends: 3500 [2024-11-08 16:30:20,399 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=291, Invalid=4401, Unknown=0, NotChecked=0, Total=4692 [2024-11-08 16:30:20,400 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 78 mSDsluCounter, 1933 mSDsCounter, 0 mSdLazyCounter, 3170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:30:20,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1995 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3170 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-08 16:30:20,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2024-11-08 16:30:20,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 3157. [2024-11-08 16:30:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3153 states have (on average 1.1008563273073264) internal successors, (3471), 3156 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:30:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 3471 transitions. [2024-11-08 16:30:20,427 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 3471 transitions. Word has length 108 [2024-11-08 16:30:20,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:30:20,427 INFO L471 AbstractCegarLoop]: Abstraction has 3157 states and 3471 transitions. [2024-11-08 16:30:20,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.5) internal successors, (154), 44 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:30:20,428 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 3471 transitions. [2024-11-08 16:30:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-08 16:30:20,430 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:30:20,430 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:30:20,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2024-11-08 16:30:20,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2024-11-08 16:30:20,631 INFO L396 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:30:20,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:30:20,631 INFO L85 PathProgramCache]: Analyzing trace with hash 546255041, now seen corresponding path program 20 times [2024-11-08 16:30:20,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:30:20,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828232125] [2024-11-08 16:30:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:30:20,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:30:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:30:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 136 proven. 194 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:30:23,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:30:23,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828232125] [2024-11-08 16:30:23,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828232125] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:30:23,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860479149] [2024-11-08 16:30:23,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:30:23,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:30:23,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:30:23,745 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:30:23,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-11-08 16:30:24,412 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:30:24,413 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:30:24,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-11-08 16:30:24,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:30:24,550 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-08 16:30:24,550 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 1 case distinctions, treesize of input 13 treesize of output 11 [2024-11-08 16:30:24,561 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 10 treesize of output 8 [2024-11-08 16:30:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:30:29,330 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:30:35,352 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:30:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:30:35,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860479149] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:30:35,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:30:35,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 37] total 106 [2024-11-08 16:30:35,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837391205] [2024-11-08 16:30:35,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:30:35,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2024-11-08 16:30:35,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:30:35,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2024-11-08 16:30:35,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=10215, Unknown=0, NotChecked=0, Total=11342 [2024-11-08 16:30:35,642 INFO L87 Difference]: Start difference. First operand 3157 states and 3471 transitions. Second operand has 107 states, 106 states have (on average 2.839622641509434) internal successors, (301), 107 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:30:52,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:30:52,731 INFO L93 Difference]: Finished difference Result 4448 states and 4788 transitions. [2024-11-08 16:30:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-11-08 16:30:52,731 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 2.839622641509434) internal successors, (301), 107 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2024-11-08 16:30:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:30:52,735 INFO L225 Difference]: With dead ends: 4448 [2024-11-08 16:30:52,735 INFO L226 Difference]: Without dead ends: 4134 [2024-11-08 16:30:52,737 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11198 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=3860, Invalid=31296, Unknown=0, NotChecked=0, Total=35156 [2024-11-08 16:30:52,737 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 668 mSDsluCounter, 2313 mSDsCounter, 0 mSdLazyCounter, 7678 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 2377 SdHoareTripleChecker+Invalid, 7990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 7678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:30:52,738 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 2377 Invalid, 7990 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [312 Valid, 7678 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2024-11-08 16:30:52,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2024-11-08 16:30:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 3299. [2024-11-08 16:30:52,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3299 states, 3295 states have (on average 1.094081942336874) internal successors, (3605), 3298 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:30:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3299 states to 3299 states and 3605 transitions. [2024-11-08 16:30:52,773 INFO L78 Accepts]: Start accepts. Automaton has 3299 states and 3605 transitions. Word has length 109 [2024-11-08 16:30:52,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:30:52,774 INFO L471 AbstractCegarLoop]: Abstraction has 3299 states and 3605 transitions. [2024-11-08 16:30:52,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 2.839622641509434) internal successors, (301), 107 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:30:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3299 states and 3605 transitions. [2024-11-08 16:30:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-08 16:30:52,777 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:30:52,778 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:30:52,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2024-11-08 16:30:52,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-11-08 16:30:52,978 INFO L396 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:30:52,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:30:52,979 INFO L85 PathProgramCache]: Analyzing trace with hash -784853942, now seen corresponding path program 15 times [2024-11-08 16:30:52,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:30:52,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518756834] [2024-11-08 16:30:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:30:52,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:30:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:30:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 378 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:30:54,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:30:54,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518756834] [2024-11-08 16:30:54,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518756834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:30:54,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149805866] [2024-11-08 16:30:54,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:30:54,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:30:54,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:30:54,753 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:30:54,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-11-08 16:30:55,790 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-08 16:30:55,790 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:30:55,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-08 16:30:55,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:30:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 450 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:30:57,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:30:59,023 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 8 treesize of output 6 [2024-11-08 16:30:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 450 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:30:59,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149805866] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:30:59,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:30:59,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 91 [2024-11-08 16:30:59,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170219249] [2024-11-08 16:30:59,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:30:59,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-08 16:30:59,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:30:59,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-08 16:30:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1266, Invalid=7106, Unknown=0, NotChecked=0, Total=8372 [2024-11-08 16:30:59,702 INFO L87 Difference]: Start difference. First operand 3299 states and 3605 transitions. Second operand has 92 states, 91 states have (on average 2.758241758241758) internal successors, (251), 92 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:31:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:31:01,938 INFO L93 Difference]: Finished difference Result 4331 states and 4673 transitions. [2024-11-08 16:31:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-08 16:31:01,939 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 2.758241758241758) internal successors, (251), 92 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2024-11-08 16:31:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:31:01,941 INFO L225 Difference]: With dead ends: 4331 [2024-11-08 16:31:01,941 INFO L226 Difference]: Without dead ends: 4295 [2024-11-08 16:31:01,942 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 147 SyntacticMatches, 17 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1301, Invalid=7255, Unknown=0, NotChecked=0, Total=8556 [2024-11-08 16:31:01,942 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 511 mSDsluCounter, 2113 mSDsCounter, 0 mSdLazyCounter, 3842 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 2221 SdHoareTripleChecker+Invalid, 3926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:31:01,942 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 2221 Invalid, 3926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3842 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-08 16:31:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4295 states. [2024-11-08 16:31:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4295 to 3331. [2024-11-08 16:31:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3331 states, 3327 states have (on average 1.094078749624286) internal successors, (3640), 3330 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:31:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 3640 transitions. [2024-11-08 16:31:01,970 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 3640 transitions. Word has length 110 [2024-11-08 16:31:01,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:31:01,971 INFO L471 AbstractCegarLoop]: Abstraction has 3331 states and 3640 transitions. [2024-11-08 16:31:01,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 2.758241758241758) internal successors, (251), 92 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:31:01,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 3640 transitions. [2024-11-08 16:31:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-08 16:31:01,973 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:31:01,973 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:31:01,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2024-11-08 16:31:02,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2024-11-08 16:31:02,174 INFO L396 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:31:02,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:31:02,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2144292967, now seen corresponding path program 21 times [2024-11-08 16:31:02,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:31:02,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461859628] [2024-11-08 16:31:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:31:02,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:31:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:31:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 195 proven. 251 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:31:05,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:31:05,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461859628] [2024-11-08 16:31:05,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461859628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:31:05,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389161947] [2024-11-08 16:31:05,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:31:05,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:31:05,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:31:05,296 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:31:05,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-11-08 16:31:06,366 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-08 16:31:06,366 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:31:06,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 190 conjuncts are in the unsatisfiable core [2024-11-08 16:31:06,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:31:06,576 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-08 16:31:06,577 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 1 case distinctions, treesize of input 13 treesize of output 11 [2024-11-08 16:31:06,594 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 10 treesize of output 8 [2024-11-08 16:31:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 446 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:31:11,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:31:17,401 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:31:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 446 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:31:17,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389161947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:31:17,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:31:17,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38, 39] total 111 [2024-11-08 16:31:17,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282379372] [2024-11-08 16:31:17,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:31:17,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-11-08 16:31:17,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:31:17,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-11-08 16:31:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1214, Invalid=11218, Unknown=0, NotChecked=0, Total=12432 [2024-11-08 16:31:17,683 INFO L87 Difference]: Start difference. First operand 3331 states and 3640 transitions. Second operand has 112 states, 111 states have (on average 2.873873873873874) internal successors, (319), 112 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:31:36,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:31:36,065 INFO L93 Difference]: Finished difference Result 4681 states and 5011 transitions. [2024-11-08 16:31:36,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-11-08 16:31:36,065 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 111 states have (on average 2.873873873873874) internal successors, (319), 112 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2024-11-08 16:31:36,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:31:36,068 INFO L225 Difference]: With dead ends: 4681 [2024-11-08 16:31:36,068 INFO L226 Difference]: Without dead ends: 4365 [2024-11-08 16:31:36,069 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11315 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=3840, Invalid=32832, Unknown=0, NotChecked=0, Total=36672 [2024-11-08 16:31:36,070 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 567 mSDsluCounter, 2682 mSDsCounter, 0 mSdLazyCounter, 8767 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 2755 SdHoareTripleChecker+Invalid, 9069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 8767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:31:36,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 2755 Invalid, 9069 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [302 Valid, 8767 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2024-11-08 16:31:36,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4365 states. [2024-11-08 16:31:36,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4365 to 3229. [2024-11-08 16:31:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 3225 states have (on average 1.0942635658914728) internal successors, (3529), 3228 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:31:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 3529 transitions. [2024-11-08 16:31:36,098 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 3529 transitions. Word has length 111 [2024-11-08 16:31:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:31:36,098 INFO L471 AbstractCegarLoop]: Abstraction has 3229 states and 3529 transitions. [2024-11-08 16:31:36,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 111 states have (on average 2.873873873873874) internal successors, (319), 112 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:31:36,099 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 3529 transitions. [2024-11-08 16:31:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-08 16:31:36,100 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:31:36,101 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:31:36,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2024-11-08 16:31:36,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-11-08 16:31:36,301 INFO L396 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-08 16:31:36,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:31:36,302 INFO L85 PathProgramCache]: Analyzing trace with hash -652195547, now seen corresponding path program 17 times [2024-11-08 16:31:36,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:31:36,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51622874] [2024-11-08 16:31:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:31:36,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:31:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:31:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 378 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:31:39,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:31:39,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51622874] [2024-11-08 16:31:39,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51622874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:31:39,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286237476] [2024-11-08 16:31:39,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:31:39,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:31:39,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:31:39,288 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:31:39,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ceb26f-f722-4802-88bd-143d2b8e3e59/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-11-08 16:31:40,214 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-11-08 16:31:40,214 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:31:40,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-11-08 16:31:40,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:31:41,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:31:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 17 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:31:43,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:31:43,216 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 16 [2024-11-08 16:31:43,218 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 20 treesize of output 16 [2024-11-08 16:31:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 17 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:31:43,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286237476] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:31:43,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:31:43,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 40, 40] total 79 [2024-11-08 16:31:43,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984492194] [2024-11-08 16:31:43,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:31:43,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-08 16:31:43,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:31:43,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-08 16:31:43,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=5892, Unknown=0, NotChecked=0, Total=6162 [2024-11-08 16:31:43,568 INFO L87 Difference]: Start difference. First operand 3229 states and 3529 transitions. Second operand has 79 states, 79 states have (on average 2.848101265822785) internal successors, (225), 79 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)