./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0218.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0218.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI --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 d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:37:49,115 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:37:49,228 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:37:49,235 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:37:49,236 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:37:49,264 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:37:49,265 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:37:49,265 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:37:49,266 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:37:49,267 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:37:49,267 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:37:49,268 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:37:49,269 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:37:49,269 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:37:49,270 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:37:49,271 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:37:49,271 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:37:49,272 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:37:49,272 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:37:49,273 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:37:49,273 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:37:49,274 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:37:49,275 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:37:49,275 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:37:49,276 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:37:49,276 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:37:49,277 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:37:49,277 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:37:49,278 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:37:49,278 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:37:49,279 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:37:49,279 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:37:49,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:37:49,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:37:49,281 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:37:49,281 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:37:49,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:37:49,283 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:37:49,283 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:37:49,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:37:49,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:37:49,285 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_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 [2023-11-24 21:37:49,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:37:49,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:37:49,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:37:49,556 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:37:49,557 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:37:49,558 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/memsafety/test-0218.i [2023-11-24 21:37:52,675 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:37:53,104 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:37:53,106 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/sv-benchmarks/c/memsafety/test-0218.i [2023-11-24 21:37:53,136 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/data/6d81e9df2/99d6203744d746e19e63e89e610eb0f5/FLAGbd3db451a [2023-11-24 21:37:53,155 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/data/6d81e9df2/99d6203744d746e19e63e89e610eb0f5 [2023-11-24 21:37:53,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:37:53,166 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:37:53,170 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:37:53,170 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:37:53,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:37:53,177 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:37:53" (1/1) ... [2023-11-24 21:37:53,178 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f11c83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53, skipping insertion in model container [2023-11-24 21:37:53,178 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:37:53" (1/1) ... [2023-11-24 21:37:53,248 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:37:53,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:37:53,706 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:37:53,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:37:53,810 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:37:53,811 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53 WrapperNode [2023-11-24 21:37:53,811 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:37:53,812 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:37:53,813 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:37:53,813 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:37:53,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53" (1/1) ... [2023-11-24 21:37:53,840 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53" (1/1) ... [2023-11-24 21:37:53,878 INFO L138 Inliner]: procedures = 181, calls = 46, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 213 [2023-11-24 21:37:53,879 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:37:53,880 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:37:53,880 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:37:53,880 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:37:53,894 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53" (1/1) ... [2023-11-24 21:37:53,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53" (1/1) ... [2023-11-24 21:37:53,915 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53" (1/1) ... [2023-11-24 21:37:53,954 INFO L175 MemorySlicer]: Split 31 memory accesses to 2 slices as follows [2, 29]. 94 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 2]. The 10 writes are split as follows [0, 10]. [2023-11-24 21:37:53,955 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53" (1/1) ... [2023-11-24 21:37:53,955 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53" (1/1) ... [2023-11-24 21:37:53,972 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53" (1/1) ... [2023-11-24 21:37:53,977 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53" (1/1) ... [2023-11-24 21:37:53,981 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53" (1/1) ... [2023-11-24 21:37:53,983 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53" (1/1) ... [2023-11-24 21:37:53,989 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:37:53,990 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:37:53,990 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:37:53,991 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:37:53,992 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53" (1/1) ... [2023-11-24 21:37:53,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:37:54,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:37:54,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:37:54,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:37:54,095 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-11-24 21:37:54,096 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-11-24 21:37:54,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:37:54,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:37:54,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:37:54,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:37:54,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:37:54,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:37:54,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:37:54,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-24 21:37:54,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-24 21:37:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:37:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:37:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:37:54,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:37:54,273 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:37:54,276 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:37:54,898 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:37:54,955 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:37:54,955 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-24 21:37:54,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:37:54 BoogieIcfgContainer [2023-11-24 21:37:54,956 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:37:54,959 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:37:54,959 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:37:54,963 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:37:54,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:37:53" (1/3) ... [2023-11-24 21:37:54,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8717ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:37:54, skipping insertion in model container [2023-11-24 21:37:54,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:53" (2/3) ... [2023-11-24 21:37:54,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8717ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:37:54, skipping insertion in model container [2023-11-24 21:37:54,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:37:54" (3/3) ... [2023-11-24 21:37:54,966 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0218.i [2023-11-24 21:37:54,985 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:37:54,985 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 65 error locations. [2023-11-24 21:37:55,035 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:37:55,041 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3f4f7057, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:37:55,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2023-11-24 21:37:55,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 76 states have (on average 2.1842105263157894) internal successors, (166), 141 states have internal predecessors, (166), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:37:55,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:37:55,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:55,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:37:55,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:37:55,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:55,058 INFO L85 PathProgramCache]: Analyzing trace with hash 319878969, now seen corresponding path program 1 times [2023-11-24 21:37:55,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:55,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486292427] [2023-11-24 21:37:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:55,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:55,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:55,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486292427] [2023-11-24 21:37:55,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486292427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:55,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:55,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:37:55,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074806082] [2023-11-24 21:37:55,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:55,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:37:55,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:37:55,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:37:55,249 INFO L87 Difference]: Start difference. First operand has 145 states, 76 states have (on average 2.1842105263157894) internal successors, (166), 141 states have internal predecessors, (166), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:55,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:55,314 INFO L93 Difference]: Finished difference Result 145 states and 164 transitions. [2023-11-24 21:37:55,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:37:55,317 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-11-24 21:37:55,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:55,326 INFO L225 Difference]: With dead ends: 145 [2023-11-24 21:37:55,327 INFO L226 Difference]: Without dead ends: 144 [2023-11-24 21:37:55,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:37:55,333 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 147 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 [2023-11-24 21:37:55,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 147 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:37:55,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-24 21:37:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-11-24 21:37:55,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 140 states have internal predecessors, (159), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:37:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 163 transitions. [2023-11-24 21:37:55,384 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 163 transitions. Word has length 5 [2023-11-24 21:37:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:55,385 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 163 transitions. [2023-11-24 21:37:55,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:55,385 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 163 transitions. [2023-11-24 21:37:55,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:37:55,386 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:55,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:37:55,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:37:55,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:37:55,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:55,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1099452205, now seen corresponding path program 1 times [2023-11-24 21:37:55,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:55,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122287146] [2023-11-24 21:37:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:55,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:55,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:55,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122287146] [2023-11-24 21:37:55,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122287146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:55,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:55,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:37:55,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472932926] [2023-11-24 21:37:55,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:55,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:37:55,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:55,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:37:55,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:37:55,574 INFO L87 Difference]: Start difference. First operand 144 states and 163 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:55,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:55,896 INFO L93 Difference]: Finished difference Result 281 states and 318 transitions. [2023-11-24 21:37:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:37:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 21:37:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:55,901 INFO L225 Difference]: With dead ends: 281 [2023-11-24 21:37:55,902 INFO L226 Difference]: Without dead ends: 281 [2023-11-24 21:37:55,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:37:55,904 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 146 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:55,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 194 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:37:55,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-11-24 21:37:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 195. [2023-11-24 21:37:55,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 124 states have (on average 2.064516129032258) internal successors, (256), 188 states have internal predecessors, (256), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 21:37:55,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 264 transitions. [2023-11-24 21:37:55,928 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 264 transitions. Word has length 6 [2023-11-24 21:37:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:55,929 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 264 transitions. [2023-11-24 21:37:55,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:55,929 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 264 transitions. [2023-11-24 21:37:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:37:55,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:55,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:37:55,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:37:55,931 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:37:55,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:55,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1099452206, now seen corresponding path program 1 times [2023-11-24 21:37:55,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:55,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339268782] [2023-11-24 21:37:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:55,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:56,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:56,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339268782] [2023-11-24 21:37:56,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339268782] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:56,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:56,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:37:56,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616511571] [2023-11-24 21:37:56,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:56,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:37:56,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:37:56,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:37:56,123 INFO L87 Difference]: Start difference. First operand 195 states and 264 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:56,317 INFO L93 Difference]: Finished difference Result 211 states and 280 transitions. [2023-11-24 21:37:56,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:37:56,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 21:37:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:56,325 INFO L225 Difference]: With dead ends: 211 [2023-11-24 21:37:56,326 INFO L226 Difference]: Without dead ends: 211 [2023-11-24 21:37:56,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:37:56,336 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 187 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:56,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 203 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:37:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-24 21:37:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2023-11-24 21:37:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 190 states have internal predecessors, (259), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 21:37:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 267 transitions. [2023-11-24 21:37:56,374 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 267 transitions. Word has length 6 [2023-11-24 21:37:56,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:56,374 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 267 transitions. [2023-11-24 21:37:56,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:56,375 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 267 transitions. [2023-11-24 21:37:56,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:37:56,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:56,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:37:56,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:37:56,377 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:37:56,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:56,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1099452268, now seen corresponding path program 1 times [2023-11-24 21:37:56,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:56,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726984877] [2023-11-24 21:37:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:56,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:56,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:56,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726984877] [2023-11-24 21:37:56,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726984877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:56,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:56,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:37:56,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609252061] [2023-11-24 21:37:56,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:56,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:37:56,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:56,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:37:56,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:37:56,535 INFO L87 Difference]: Start difference. First operand 197 states and 267 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:56,751 INFO L93 Difference]: Finished difference Result 210 states and 278 transitions. [2023-11-24 21:37:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:37:56,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 21:37:56,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:56,754 INFO L225 Difference]: With dead ends: 210 [2023-11-24 21:37:56,754 INFO L226 Difference]: Without dead ends: 210 [2023-11-24 21:37:56,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:37:56,764 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 171 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:56,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 214 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:37:56,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-11-24 21:37:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 194. [2023-11-24 21:37:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 124 states have (on average 2.0483870967741935) internal successors, (254), 187 states have internal predecessors, (254), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 21:37:56,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 262 transitions. [2023-11-24 21:37:56,802 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 262 transitions. Word has length 6 [2023-11-24 21:37:56,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:56,802 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 262 transitions. [2023-11-24 21:37:56,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:56,803 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 262 transitions. [2023-11-24 21:37:56,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:37:56,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:56,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:56,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:37:56,805 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:37:56,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:56,806 INFO L85 PathProgramCache]: Analyzing trace with hash 11661335, now seen corresponding path program 1 times [2023-11-24 21:37:56,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:56,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263480798] [2023-11-24 21:37:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:56,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:57,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:57,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263480798] [2023-11-24 21:37:57,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263480798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:57,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:57,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:37:57,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78196738] [2023-11-24 21:37:57,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:57,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:37:57,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:57,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:37:57,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:37:57,158 INFO L87 Difference]: Start difference. First operand 194 states and 262 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:57,415 INFO L93 Difference]: Finished difference Result 346 states and 457 transitions. [2023-11-24 21:37:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:37:57,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 21:37:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:57,419 INFO L225 Difference]: With dead ends: 346 [2023-11-24 21:37:57,420 INFO L226 Difference]: Without dead ends: 346 [2023-11-24 21:37:57,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:37:57,421 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 126 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:57,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 510 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:37:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-24 21:37:57,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 252. [2023-11-24 21:37:57,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 176 states have (on average 1.9602272727272727) internal successors, (345), 241 states have internal predecessors, (345), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:37:57,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 361 transitions. [2023-11-24 21:37:57,441 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 361 transitions. Word has length 8 [2023-11-24 21:37:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:57,441 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 361 transitions. [2023-11-24 21:37:57,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:57,442 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 361 transitions. [2023-11-24 21:37:57,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:37:57,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:57,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:57,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:37:57,443 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:37:57,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:57,444 INFO L85 PathProgramCache]: Analyzing trace with hash 11720917, now seen corresponding path program 1 times [2023-11-24 21:37:57,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:57,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996082987] [2023-11-24 21:37:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:57,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:57,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:57,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996082987] [2023-11-24 21:37:57,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996082987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:57,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:57,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:37:57,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48600570] [2023-11-24 21:37:57,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:57,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:37:57,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:57,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:37:57,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:37:57,544 INFO L87 Difference]: Start difference. First operand 252 states and 361 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:57,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:57,770 INFO L93 Difference]: Finished difference Result 337 states and 447 transitions. [2023-11-24 21:37:57,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:37:57,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 21:37:57,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:57,773 INFO L225 Difference]: With dead ends: 337 [2023-11-24 21:37:57,773 INFO L226 Difference]: Without dead ends: 337 [2023-11-24 21:37:57,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:37:57,777 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 113 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:57,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 513 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:37:57,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-11-24 21:37:57,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 252. [2023-11-24 21:37:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 176 states have (on average 1.9602272727272727) internal successors, (345), 241 states have internal predecessors, (345), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:37:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 361 transitions. [2023-11-24 21:37:57,792 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 361 transitions. Word has length 8 [2023-11-24 21:37:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:57,793 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 361 transitions. [2023-11-24 21:37:57,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:57,793 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 361 transitions. [2023-11-24 21:37:57,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:37:57,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:57,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:57,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:37:57,795 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:37:57,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:57,795 INFO L85 PathProgramCache]: Analyzing trace with hash 361500123, now seen corresponding path program 1 times [2023-11-24 21:37:57,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:57,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111632267] [2023-11-24 21:37:57,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:57,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:57,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:57,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111632267] [2023-11-24 21:37:57,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111632267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:57,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:57,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:37:57,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974803233] [2023-11-24 21:37:57,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:57,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:37:57,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:57,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:37:57,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:37:57,840 INFO L87 Difference]: Start difference. First operand 252 states and 361 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2023-11-24 21:37:57,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:57,981 INFO L93 Difference]: Finished difference Result 300 states and 405 transitions. [2023-11-24 21:37:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:37:57,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 [2023-11-24 21:37:57,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:57,985 INFO L225 Difference]: With dead ends: 300 [2023-11-24 21:37:57,986 INFO L226 Difference]: Without dead ends: 294 [2023-11-24 21:37:57,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:37:57,987 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 59 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:57,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 219 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:37:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-11-24 21:37:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 249. [2023-11-24 21:37:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 173 states have (on average 1.9653179190751444) internal successors, (340), 238 states have internal predecessors, (340), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:37:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 356 transitions. [2023-11-24 21:37:57,996 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 356 transitions. Word has length 9 [2023-11-24 21:37:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:57,997 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 356 transitions. [2023-11-24 21:37:57,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2023-11-24 21:37:57,997 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 356 transitions. [2023-11-24 21:37:57,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 21:37:57,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:57,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:57,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:37:57,998 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:37:57,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:57,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1143205964, now seen corresponding path program 1 times [2023-11-24 21:37:57,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:57,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038579251] [2023-11-24 21:37:57,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:57,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:58,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-24 21:37:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:58,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:58,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038579251] [2023-11-24 21:37:58,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038579251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:58,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:58,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:37:58,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447170853] [2023-11-24 21:37:58,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:58,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:37:58,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:58,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:37:58,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:37:58,099 INFO L87 Difference]: Start difference. First operand 249 states and 356 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:37:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:58,349 INFO L93 Difference]: Finished difference Result 341 states and 427 transitions. [2023-11-24 21:37:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:37:58,350 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-24 21:37:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:58,353 INFO L225 Difference]: With dead ends: 341 [2023-11-24 21:37:58,353 INFO L226 Difference]: Without dead ends: 341 [2023-11-24 21:37:58,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:37:58,354 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 149 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:58,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 280 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:37:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-11-24 21:37:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 255. [2023-11-24 21:37:58,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 179 states have (on average 1.9329608938547487) internal successors, (346), 244 states have internal predecessors, (346), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:37:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 362 transitions. [2023-11-24 21:37:58,365 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 362 transitions. Word has length 14 [2023-11-24 21:37:58,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:58,366 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 362 transitions. [2023-11-24 21:37:58,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:37:58,366 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 362 transitions. [2023-11-24 21:37:58,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 21:37:58,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:58,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:58,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:37:58,367 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:37:58,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:58,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1143205965, now seen corresponding path program 1 times [2023-11-24 21:37:58,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:58,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346695556] [2023-11-24 21:37:58,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:58,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:58,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-24 21:37:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:58,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:58,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346695556] [2023-11-24 21:37:58,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346695556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:58,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:58,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:37:58,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173521558] [2023-11-24 21:37:58,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:58,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:37:58,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:58,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:37:58,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:37:58,496 INFO L87 Difference]: Start difference. First operand 255 states and 362 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:37:58,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:58,645 INFO L93 Difference]: Finished difference Result 252 states and 350 transitions. [2023-11-24 21:37:58,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:37:58,645 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-24 21:37:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:58,647 INFO L225 Difference]: With dead ends: 252 [2023-11-24 21:37:58,647 INFO L226 Difference]: Without dead ends: 252 [2023-11-24 21:37:58,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:37:58,648 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 161 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:58,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 188 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:37:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-24 21:37:58,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2023-11-24 21:37:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 179 states have (on average 1.8659217877094971) internal successors, (334), 241 states have internal predecessors, (334), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:37:58,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 350 transitions. [2023-11-24 21:37:58,659 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 350 transitions. Word has length 14 [2023-11-24 21:37:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:58,659 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 350 transitions. [2023-11-24 21:37:58,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:37:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 350 transitions. [2023-11-24 21:37:58,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:37:58,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:58,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:58,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:37:58,661 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:37:58,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash 427633431, now seen corresponding path program 1 times [2023-11-24 21:37:58,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:58,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403511714] [2023-11-24 21:37:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:58,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:58,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:37:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:58,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:58,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403511714] [2023-11-24 21:37:58,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403511714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:58,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:58,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:37:58,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341474106] [2023-11-24 21:37:58,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:58,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:37:58,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:58,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:37:58,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:37:58,796 INFO L87 Difference]: Start difference. First operand 252 states and 350 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:37:59,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:59,085 INFO L93 Difference]: Finished difference Result 356 states and 443 transitions. [2023-11-24 21:37:59,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:37:59,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-24 21:37:59,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:59,089 INFO L225 Difference]: With dead ends: 356 [2023-11-24 21:37:59,089 INFO L226 Difference]: Without dead ends: 356 [2023-11-24 21:37:59,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:37:59,090 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 312 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:59,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 260 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:37:59,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-11-24 21:37:59,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 249. [2023-11-24 21:37:59,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 180 states have (on average 1.8222222222222222) internal successors, (328), 238 states have internal predecessors, (328), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 21:37:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 344 transitions. [2023-11-24 21:37:59,104 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 344 transitions. Word has length 16 [2023-11-24 21:37:59,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:59,104 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 344 transitions. [2023-11-24 21:37:59,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:37:59,105 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 344 transitions. [2023-11-24 21:37:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:37:59,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:59,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:59,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:37:59,110 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:37:59,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:59,110 INFO L85 PathProgramCache]: Analyzing trace with hash 427633432, now seen corresponding path program 1 times [2023-11-24 21:37:59,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:59,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507920600] [2023-11-24 21:37:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:59,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:59,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:37:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:59,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:59,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507920600] [2023-11-24 21:37:59,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507920600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:59,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:59,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:37:59,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080279467] [2023-11-24 21:37:59,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:59,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:37:59,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:59,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:37:59,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:37:59,380 INFO L87 Difference]: Start difference. First operand 249 states and 344 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:37:59,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:59,720 INFO L93 Difference]: Finished difference Result 382 states and 543 transitions. [2023-11-24 21:37:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:37:59,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-24 21:37:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:59,724 INFO L225 Difference]: With dead ends: 382 [2023-11-24 21:37:59,724 INFO L226 Difference]: Without dead ends: 382 [2023-11-24 21:37:59,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:37:59,725 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 330 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:59,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 404 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:37:59,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-11-24 21:37:59,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 301. [2023-11-24 21:37:59,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 228 states have (on average 1.8026315789473684) internal successors, (411), 288 states have internal predecessors, (411), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-24 21:37:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 435 transitions. [2023-11-24 21:37:59,768 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 435 transitions. Word has length 16 [2023-11-24 21:37:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:59,769 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 435 transitions. [2023-11-24 21:37:59,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:37:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 435 transitions. [2023-11-24 21:37:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:37:59,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:59,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:59,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:37:59,774 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:37:59,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1379821031, now seen corresponding path program 1 times [2023-11-24 21:37:59,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:59,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807227592] [2023-11-24 21:37:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:59,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:59,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:37:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:59,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:59,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807227592] [2023-11-24 21:37:59,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807227592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:59,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:59,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:37:59,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143766660] [2023-11-24 21:37:59,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:59,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:37:59,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:37:59,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:37:59,872 INFO L87 Difference]: Start difference. First operand 301 states and 435 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:00,007 INFO L93 Difference]: Finished difference Result 375 states and 545 transitions. [2023-11-24 21:38:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:38:00,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-24 21:38:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:00,012 INFO L225 Difference]: With dead ends: 375 [2023-11-24 21:38:00,013 INFO L226 Difference]: Without dead ends: 375 [2023-11-24 21:38:00,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:38:00,014 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 101 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:00,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 852 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:38:00,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-11-24 21:38:00,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 301. [2023-11-24 21:38:00,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 228 states have (on average 1.793859649122807) internal successors, (409), 288 states have internal predecessors, (409), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-24 21:38:00,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 433 transitions. [2023-11-24 21:38:00,031 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 433 transitions. Word has length 16 [2023-11-24 21:38:00,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:00,031 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 433 transitions. [2023-11-24 21:38:00,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:00,031 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 433 transitions. [2023-11-24 21:38:00,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 21:38:00,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:00,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:00,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:38:00,033 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:00,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:00,034 INFO L85 PathProgramCache]: Analyzing trace with hash 175276576, now seen corresponding path program 1 times [2023-11-24 21:38:00,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:00,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642482206] [2023-11-24 21:38:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:00,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:00,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:00,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:00,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642482206] [2023-11-24 21:38:00,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642482206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:00,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:00,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:38:00,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487333486] [2023-11-24 21:38:00,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:00,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:38:00,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:00,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:38:00,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:00,282 INFO L87 Difference]: Start difference. First operand 301 states and 433 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:00,619 INFO L93 Difference]: Finished difference Result 413 states and 602 transitions. [2023-11-24 21:38:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:38:00,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-24 21:38:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:00,622 INFO L225 Difference]: With dead ends: 413 [2023-11-24 21:38:00,622 INFO L226 Difference]: Without dead ends: 413 [2023-11-24 21:38:00,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:38:00,623 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 270 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:00,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 484 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:38:00,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-11-24 21:38:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 296. [2023-11-24 21:38:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 223 states have (on average 1.798206278026906) internal successors, (401), 283 states have internal predecessors, (401), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-24 21:38:00,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 425 transitions. [2023-11-24 21:38:00,641 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 425 transitions. Word has length 17 [2023-11-24 21:38:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:00,642 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 425 transitions. [2023-11-24 21:38:00,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 425 transitions. [2023-11-24 21:38:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:38:00,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:00,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:00,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:38:00,644 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:00,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:00,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1129705676, now seen corresponding path program 1 times [2023-11-24 21:38:00,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:00,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221020882] [2023-11-24 21:38:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:00,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:00,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-24 21:38:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:00,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:00,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221020882] [2023-11-24 21:38:00,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221020882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:00,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:00,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:38:00,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208814224] [2023-11-24 21:38:00,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:00,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:38:00,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:00,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:38:00,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:00,844 INFO L87 Difference]: Start difference. First operand 296 states and 425 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:01,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:01,182 INFO L93 Difference]: Finished difference Result 389 states and 532 transitions. [2023-11-24 21:38:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:38:01,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-24 21:38:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:01,188 INFO L225 Difference]: With dead ends: 389 [2023-11-24 21:38:01,188 INFO L226 Difference]: Without dead ends: 389 [2023-11-24 21:38:01,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:38:01,189 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 94 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:01,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 630 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:38:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-11-24 21:38:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 290. [2023-11-24 21:38:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 217 states have (on average 1.7972350230414746) internal successors, (390), 277 states have internal predecessors, (390), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-24 21:38:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 414 transitions. [2023-11-24 21:38:01,205 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 414 transitions. Word has length 18 [2023-11-24 21:38:01,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:01,205 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 414 transitions. [2023-11-24 21:38:01,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 414 transitions. [2023-11-24 21:38:01,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:38:01,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:01,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:01,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:38:01,208 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:01,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:01,208 INFO L85 PathProgramCache]: Analyzing trace with hash -660774663, now seen corresponding path program 1 times [2023-11-24 21:38:01,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:01,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707746743] [2023-11-24 21:38:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:01,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:01,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-24 21:38:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:01,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:01,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707746743] [2023-11-24 21:38:01,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707746743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:01,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:01,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:38:01,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230807427] [2023-11-24 21:38:01,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:01,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:38:01,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:01,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:38:01,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:01,319 INFO L87 Difference]: Start difference. First operand 290 states and 414 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:01,611 INFO L93 Difference]: Finished difference Result 364 states and 471 transitions. [2023-11-24 21:38:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:38:01,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-24 21:38:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:01,615 INFO L225 Difference]: With dead ends: 364 [2023-11-24 21:38:01,615 INFO L226 Difference]: Without dead ends: 364 [2023-11-24 21:38:01,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:38:01,616 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 160 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:01,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 278 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:38:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-11-24 21:38:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 302. [2023-11-24 21:38:01,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 229 states have (on average 1.8165938864628821) internal successors, (416), 289 states have internal predecessors, (416), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-24 21:38:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 440 transitions. [2023-11-24 21:38:01,630 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 440 transitions. Word has length 19 [2023-11-24 21:38:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:01,630 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 440 transitions. [2023-11-24 21:38:01,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:01,631 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 440 transitions. [2023-11-24 21:38:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:38:01,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:01,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:01,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:38:01,632 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:01,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:01,633 INFO L85 PathProgramCache]: Analyzing trace with hash -660774662, now seen corresponding path program 1 times [2023-11-24 21:38:01,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:01,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116420147] [2023-11-24 21:38:01,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:01,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:01,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-24 21:38:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:01,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:01,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116420147] [2023-11-24 21:38:01,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116420147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:01,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:01,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:38:01,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135882337] [2023-11-24 21:38:01,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:01,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:38:01,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:01,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:38:01,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:38:01,829 INFO L87 Difference]: Start difference. First operand 302 states and 440 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:02,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:02,053 INFO L93 Difference]: Finished difference Result 302 states and 423 transitions. [2023-11-24 21:38:02,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:38:02,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-24 21:38:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:02,056 INFO L225 Difference]: With dead ends: 302 [2023-11-24 21:38:02,056 INFO L226 Difference]: Without dead ends: 302 [2023-11-24 21:38:02,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:38:02,058 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 49 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:02,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 631 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:38:02,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-11-24 21:38:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 263. [2023-11-24 21:38:02,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 194 states have (on average 1.824742268041237) internal successors, (354), 252 states have internal predecessors, (354), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 372 transitions. [2023-11-24 21:38:02,070 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 372 transitions. Word has length 19 [2023-11-24 21:38:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:02,070 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 372 transitions. [2023-11-24 21:38:02,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 372 transitions. [2023-11-24 21:38:02,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:38:02,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:02,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:02,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:38:02,072 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:02,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:02,073 INFO L85 PathProgramCache]: Analyzing trace with hash 762169515, now seen corresponding path program 1 times [2023-11-24 21:38:02,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:02,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734265754] [2023-11-24 21:38:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:02,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:02,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:02,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:02,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734265754] [2023-11-24 21:38:02,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734265754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:02,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:02,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:38:02,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486685384] [2023-11-24 21:38:02,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:02,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:38:02,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:02,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:38:02,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:38:02,298 INFO L87 Difference]: Start difference. First operand 263 states and 372 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:02,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:02,598 INFO L93 Difference]: Finished difference Result 354 states and 495 transitions. [2023-11-24 21:38:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:38:02,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-24 21:38:02,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:02,601 INFO L225 Difference]: With dead ends: 354 [2023-11-24 21:38:02,602 INFO L226 Difference]: Without dead ends: 354 [2023-11-24 21:38:02,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:38:02,603 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 121 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:02,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 766 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:38:02,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-11-24 21:38:02,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 271. [2023-11-24 21:38:02,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 202 states have (on average 1.801980198019802) internal successors, (364), 259 states have internal predecessors, (364), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 382 transitions. [2023-11-24 21:38:02,615 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 382 transitions. Word has length 19 [2023-11-24 21:38:02,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:02,616 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 382 transitions. [2023-11-24 21:38:02,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:02,616 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 382 transitions. [2023-11-24 21:38:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 21:38:02,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:02,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:02,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:38:02,618 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:02,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:02,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1008159581, now seen corresponding path program 1 times [2023-11-24 21:38:02,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:02,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640540983] [2023-11-24 21:38:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:02,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:02,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:02,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:02,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640540983] [2023-11-24 21:38:02,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640540983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:02,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:02,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:38:02,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380762822] [2023-11-24 21:38:02,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:02,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:38:02,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:02,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:38:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:38:02,892 INFO L87 Difference]: Start difference. First operand 271 states and 382 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:03,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:03,197 INFO L93 Difference]: Finished difference Result 349 states and 485 transitions. [2023-11-24 21:38:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:38:03,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-24 21:38:03,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:03,199 INFO L225 Difference]: With dead ends: 349 [2023-11-24 21:38:03,199 INFO L226 Difference]: Without dead ends: 349 [2023-11-24 21:38:03,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:38:03,200 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 114 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:03,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 828 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:38:03,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-24 21:38:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 275. [2023-11-24 21:38:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 206 states have (on average 1.7864077669902914) internal successors, (368), 262 states have internal predecessors, (368), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 386 transitions. [2023-11-24 21:38:03,210 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 386 transitions. Word has length 20 [2023-11-24 21:38:03,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:03,210 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 386 transitions. [2023-11-24 21:38:03,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:03,211 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 386 transitions. [2023-11-24 21:38:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 21:38:03,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:03,212 INFO L195 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] [2023-11-24 21:38:03,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:38:03,212 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:03,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:03,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1432820251, now seen corresponding path program 1 times [2023-11-24 21:38:03,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:03,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61777035] [2023-11-24 21:38:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:03,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:03,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:03,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:03,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61777035] [2023-11-24 21:38:03,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61777035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:03,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:03,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:03,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28541825] [2023-11-24 21:38:03,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:03,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:38:03,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:03,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:38:03,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:03,263 INFO L87 Difference]: Start difference. First operand 275 states and 386 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:03,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:03,321 INFO L93 Difference]: Finished difference Result 291 states and 402 transitions. [2023-11-24 21:38:03,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:38:03,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-24 21:38:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:03,325 INFO L225 Difference]: With dead ends: 291 [2023-11-24 21:38:03,325 INFO L226 Difference]: Without dead ends: 291 [2023-11-24 21:38:03,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:38:03,326 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 3 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:03,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 402 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:38:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-11-24 21:38:03,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 287. [2023-11-24 21:38:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 218 states have (on average 1.7431192660550459) internal successors, (380), 274 states have internal predecessors, (380), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:03,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 398 transitions. [2023-11-24 21:38:03,336 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 398 transitions. Word has length 22 [2023-11-24 21:38:03,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:03,336 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 398 transitions. [2023-11-24 21:38:03,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 398 transitions. [2023-11-24 21:38:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 21:38:03,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:03,337 INFO L195 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] [2023-11-24 21:38:03,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 21:38:03,338 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:03,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:03,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1432760669, now seen corresponding path program 1 times [2023-11-24 21:38:03,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:03,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293370685] [2023-11-24 21:38:03,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:03,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:03,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:03,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:03,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293370685] [2023-11-24 21:38:03,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293370685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:03,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:03,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:38:03,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800526604] [2023-11-24 21:38:03,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:03,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:38:03,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:03,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:38:03,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:03,423 INFO L87 Difference]: Start difference. First operand 287 states and 398 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:03,571 INFO L93 Difference]: Finished difference Result 383 states and 548 transitions. [2023-11-24 21:38:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:38:03,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-24 21:38:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:03,574 INFO L225 Difference]: With dead ends: 383 [2023-11-24 21:38:03,575 INFO L226 Difference]: Without dead ends: 383 [2023-11-24 21:38:03,575 INFO L412 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 [2023-11-24 21:38:03,575 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 69 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:03,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 297 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:38:03,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-11-24 21:38:03,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 344. [2023-11-24 21:38:03,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 275 states have (on average 1.7163636363636363) internal successors, (472), 331 states have internal predecessors, (472), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:03,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 490 transitions. [2023-11-24 21:38:03,588 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 490 transitions. Word has length 22 [2023-11-24 21:38:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:03,588 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 490 transitions. [2023-11-24 21:38:03,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 490 transitions. [2023-11-24 21:38:03,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 21:38:03,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:03,589 INFO L195 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] [2023-11-24 21:38:03,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 21:38:03,591 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:03,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:03,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1432760670, now seen corresponding path program 1 times [2023-11-24 21:38:03,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:03,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371395591] [2023-11-24 21:38:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:03,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:03,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:03,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:03,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371395591] [2023-11-24 21:38:03,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371395591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:03,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:03,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:03,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544273623] [2023-11-24 21:38:03,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:03,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:03,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:03,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:03,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:03,661 INFO L87 Difference]: Start difference. First operand 344 states and 490 transitions. Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:03,751 INFO L93 Difference]: Finished difference Result 342 states and 478 transitions. [2023-11-24 21:38:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:03,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-24 21:38:03,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:03,754 INFO L225 Difference]: With dead ends: 342 [2023-11-24 21:38:03,754 INFO L226 Difference]: Without dead ends: 342 [2023-11-24 21:38:03,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:03,755 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 31 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:03,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 192 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:38:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-11-24 21:38:03,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2023-11-24 21:38:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 275 states have (on average 1.6727272727272726) internal successors, (460), 329 states have internal predecessors, (460), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 478 transitions. [2023-11-24 21:38:03,767 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 478 transitions. Word has length 22 [2023-11-24 21:38:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:03,767 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 478 transitions. [2023-11-24 21:38:03,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 478 transitions. [2023-11-24 21:38:03,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 21:38:03,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:03,768 INFO L195 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] [2023-11-24 21:38:03,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 21:38:03,769 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:03,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:03,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1402069452, now seen corresponding path program 1 times [2023-11-24 21:38:03,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:03,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556467842] [2023-11-24 21:38:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:03,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:03,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:03,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556467842] [2023-11-24 21:38:03,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556467842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:03,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:03,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:38:03,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395607594] [2023-11-24 21:38:03,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:03,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:38:03,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:03,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:38:03,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:03,840 INFO L87 Difference]: Start difference. First operand 342 states and 478 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:03,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:03,931 INFO L93 Difference]: Finished difference Result 404 states and 566 transitions. [2023-11-24 21:38:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:38:03,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-24 21:38:03,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:03,936 INFO L225 Difference]: With dead ends: 404 [2023-11-24 21:38:03,936 INFO L226 Difference]: Without dead ends: 404 [2023-11-24 21:38:03,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:38:03,937 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 92 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:03,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 663 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:38:03,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-11-24 21:38:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 342. [2023-11-24 21:38:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 275 states have (on average 1.6618181818181819) internal successors, (457), 329 states have internal predecessors, (457), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 475 transitions. [2023-11-24 21:38:03,949 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 475 transitions. Word has length 23 [2023-11-24 21:38:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:03,950 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 475 transitions. [2023-11-24 21:38:03,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 475 transitions. [2023-11-24 21:38:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 21:38:03,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:03,951 INFO L195 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] [2023-11-24 21:38:03,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-24 21:38:03,951 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:03,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:03,952 INFO L85 PathProgramCache]: Analyzing trace with hash 891535275, now seen corresponding path program 1 times [2023-11-24 21:38:03,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:03,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597805830] [2023-11-24 21:38:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:03,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:04,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:04,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:04,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597805830] [2023-11-24 21:38:04,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597805830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:04,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:04,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:38:04,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188344369] [2023-11-24 21:38:04,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:04,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:38:04,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:04,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:38:04,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:04,050 INFO L87 Difference]: Start difference. First operand 342 states and 475 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:04,182 INFO L93 Difference]: Finished difference Result 436 states and 617 transitions. [2023-11-24 21:38:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:38:04,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-24 21:38:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:04,186 INFO L225 Difference]: With dead ends: 436 [2023-11-24 21:38:04,186 INFO L226 Difference]: Without dead ends: 436 [2023-11-24 21:38:04,186 INFO L412 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 [2023-11-24 21:38:04,187 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 64 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:04,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 235 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:38:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-11-24 21:38:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 342. [2023-11-24 21:38:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 275 states have (on average 1.6618181818181819) internal successors, (457), 329 states have internal predecessors, (457), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 475 transitions. [2023-11-24 21:38:04,198 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 475 transitions. Word has length 23 [2023-11-24 21:38:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:04,199 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 475 transitions. [2023-11-24 21:38:04,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:04,199 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 475 transitions. [2023-11-24 21:38:04,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 21:38:04,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:04,200 INFO L195 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] [2023-11-24 21:38:04,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-24 21:38:04,200 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:04,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:04,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1571593645, now seen corresponding path program 1 times [2023-11-24 21:38:04,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:04,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159865460] [2023-11-24 21:38:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:04,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:04,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:04,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:04,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159865460] [2023-11-24 21:38:04,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159865460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:04,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:04,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:38:04,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823574109] [2023-11-24 21:38:04,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:04,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:38:04,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:04,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:38:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:04,294 INFO L87 Difference]: Start difference. First operand 342 states and 475 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:04,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:04,403 INFO L93 Difference]: Finished difference Result 400 states and 556 transitions. [2023-11-24 21:38:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:38:04,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-24 21:38:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:04,406 INFO L225 Difference]: With dead ends: 400 [2023-11-24 21:38:04,406 INFO L226 Difference]: Without dead ends: 400 [2023-11-24 21:38:04,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:38:04,407 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 93 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:04,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 822 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:38:04,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-24 21:38:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 284. [2023-11-24 21:38:04,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 218 states have (on average 1.6605504587155964) internal successors, (362), 271 states have internal predecessors, (362), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 380 transitions. [2023-11-24 21:38:04,417 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 380 transitions. Word has length 23 [2023-11-24 21:38:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:04,418 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 380 transitions. [2023-11-24 21:38:04,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 380 transitions. [2023-11-24 21:38:04,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 21:38:04,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:04,419 INFO L195 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] [2023-11-24 21:38:04,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-24 21:38:04,419 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:04,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1801500355, now seen corresponding path program 1 times [2023-11-24 21:38:04,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:04,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964919714] [2023-11-24 21:38:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:04,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:04,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:04,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:04,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964919714] [2023-11-24 21:38:04,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964919714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:04,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:04,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:38:04,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732849711] [2023-11-24 21:38:04,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:04,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:38:04,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:04,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:38:04,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:38:04,522 INFO L87 Difference]: Start difference. First operand 284 states and 380 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:04,660 INFO L93 Difference]: Finished difference Result 320 states and 424 transitions. [2023-11-24 21:38:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:38:04,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-24 21:38:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:04,663 INFO L225 Difference]: With dead ends: 320 [2023-11-24 21:38:04,663 INFO L226 Difference]: Without dead ends: 320 [2023-11-24 21:38:04,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:04,664 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 16 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:04,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 465 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:38:04,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-11-24 21:38:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 308. [2023-11-24 21:38:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 242 states have (on average 1.6198347107438016) internal successors, (392), 295 states have internal predecessors, (392), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 410 transitions. [2023-11-24 21:38:04,674 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 410 transitions. Word has length 24 [2023-11-24 21:38:04,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:04,674 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 410 transitions. [2023-11-24 21:38:04,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 410 transitions. [2023-11-24 21:38:04,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 21:38:04,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:04,675 INFO L195 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] [2023-11-24 21:38:04,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-24 21:38:04,676 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:04,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:04,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1801500549, now seen corresponding path program 1 times [2023-11-24 21:38:04,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:04,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058922039] [2023-11-24 21:38:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:04,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:04,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:04,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:04,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058922039] [2023-11-24 21:38:04,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058922039] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:04,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:04,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:04,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488933431] [2023-11-24 21:38:04,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:04,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:38:04,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:04,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:38:04,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:38:04,765 INFO L87 Difference]: Start difference. First operand 308 states and 410 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:04,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:04,886 INFO L93 Difference]: Finished difference Result 425 states and 574 transitions. [2023-11-24 21:38:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:38:04,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-24 21:38:04,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:04,889 INFO L225 Difference]: With dead ends: 425 [2023-11-24 21:38:04,890 INFO L226 Difference]: Without dead ends: 425 [2023-11-24 21:38:04,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:04,890 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 97 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:04,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 268 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:38:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-11-24 21:38:04,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 397. [2023-11-24 21:38:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 331 states have (on average 1.5891238670694865) internal successors, (526), 384 states have internal predecessors, (526), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:04,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 544 transitions. [2023-11-24 21:38:04,902 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 544 transitions. Word has length 24 [2023-11-24 21:38:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:04,902 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 544 transitions. [2023-11-24 21:38:04,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:04,903 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 544 transitions. [2023-11-24 21:38:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:38:04,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:04,903 INFO L195 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] [2023-11-24 21:38:04,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-24 21:38:04,904 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:04,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2066908813, now seen corresponding path program 1 times [2023-11-24 21:38:04,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:04,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255538356] [2023-11-24 21:38:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:04,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:04,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:04,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:04,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255538356] [2023-11-24 21:38:04,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255538356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:05,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:05,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:38:05,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153166261] [2023-11-24 21:38:05,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:05,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:38:05,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:38:05,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:05,002 INFO L87 Difference]: Start difference. First operand 397 states and 544 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:05,168 INFO L93 Difference]: Finished difference Result 424 states and 566 transitions. [2023-11-24 21:38:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:38:05,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-11-24 21:38:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:05,171 INFO L225 Difference]: With dead ends: 424 [2023-11-24 21:38:05,171 INFO L226 Difference]: Without dead ends: 424 [2023-11-24 21:38:05,172 INFO L412 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 [2023-11-24 21:38:05,172 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 58 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:05,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 311 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:38:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-24 21:38:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 307. [2023-11-24 21:38:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 242 states have (on average 1.5867768595041323) internal successors, (384), 294 states have internal predecessors, (384), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 402 transitions. [2023-11-24 21:38:05,182 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 402 transitions. Word has length 25 [2023-11-24 21:38:05,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:05,183 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 402 transitions. [2023-11-24 21:38:05,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:05,183 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 402 transitions. [2023-11-24 21:38:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 21:38:05,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:05,184 INFO L195 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, 1] [2023-11-24 21:38:05,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-24 21:38:05,184 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:05,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:05,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1402781752, now seen corresponding path program 1 times [2023-11-24 21:38:05,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:05,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069444617] [2023-11-24 21:38:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:05,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:05,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:05,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:05,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069444617] [2023-11-24 21:38:05,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069444617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:05,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:05,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:38:05,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264451029] [2023-11-24 21:38:05,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:05,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:38:05,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:05,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:38:05,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:05,332 INFO L87 Difference]: Start difference. First operand 307 states and 402 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:05,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:05,472 INFO L93 Difference]: Finished difference Result 306 states and 400 transitions. [2023-11-24 21:38:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:38:05,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-11-24 21:38:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:05,475 INFO L225 Difference]: With dead ends: 306 [2023-11-24 21:38:05,475 INFO L226 Difference]: Without dead ends: 306 [2023-11-24 21:38:05,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:05,476 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 39 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:05,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 279 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:38:05,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-11-24 21:38:05,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2023-11-24 21:38:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 242 states have (on average 1.578512396694215) internal successors, (382), 293 states have internal predecessors, (382), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 400 transitions. [2023-11-24 21:38:05,488 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 400 transitions. Word has length 27 [2023-11-24 21:38:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:05,489 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 400 transitions. [2023-11-24 21:38:05,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 400 transitions. [2023-11-24 21:38:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 21:38:05,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:05,492 INFO L195 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, 1] [2023-11-24 21:38:05,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-24 21:38:05,492 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:05,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:05,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1402781753, now seen corresponding path program 1 times [2023-11-24 21:38:05,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:05,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375982127] [2023-11-24 21:38:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:05,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:05,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:05,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:05,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375982127] [2023-11-24 21:38:05,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375982127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:05,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:05,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:38:05,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612600235] [2023-11-24 21:38:05,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:05,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:38:05,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:05,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:38:05,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:05,583 INFO L87 Difference]: Start difference. First operand 306 states and 400 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:05,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:05,732 INFO L93 Difference]: Finished difference Result 305 states and 398 transitions. [2023-11-24 21:38:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:38:05,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-11-24 21:38:05,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:05,735 INFO L225 Difference]: With dead ends: 305 [2023-11-24 21:38:05,735 INFO L226 Difference]: Without dead ends: 305 [2023-11-24 21:38:05,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:05,736 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 48 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:05,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 261 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:38:05,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-11-24 21:38:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2023-11-24 21:38:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 242 states have (on average 1.5702479338842976) internal successors, (380), 292 states have internal predecessors, (380), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:05,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 398 transitions. [2023-11-24 21:38:05,753 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 398 transitions. Word has length 27 [2023-11-24 21:38:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:05,753 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 398 transitions. [2023-11-24 21:38:05,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 398 transitions. [2023-11-24 21:38:05,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:38:05,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:05,755 INFO L195 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, 1, 1, 1] [2023-11-24 21:38:05,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-24 21:38:05,756 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:05,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash 546469544, now seen corresponding path program 1 times [2023-11-24 21:38:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:05,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121705920] [2023-11-24 21:38:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:05,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:05,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:05,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:05,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121705920] [2023-11-24 21:38:05,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121705920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:05,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:05,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:05,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704415020] [2023-11-24 21:38:05,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:05,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:38:05,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:05,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:38:05,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:38:05,879 INFO L87 Difference]: Start difference. First operand 305 states and 398 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:06,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:06,070 INFO L93 Difference]: Finished difference Result 309 states and 392 transitions. [2023-11-24 21:38:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:38:06,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-11-24 21:38:06,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:06,073 INFO L225 Difference]: With dead ends: 309 [2023-11-24 21:38:06,074 INFO L226 Difference]: Without dead ends: 309 [2023-11-24 21:38:06,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:38:06,075 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 61 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:06,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 359 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:38:06,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-24 21:38:06,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 302. [2023-11-24 21:38:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 242 states have (on average 1.5454545454545454) internal successors, (374), 289 states have internal predecessors, (374), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 392 transitions. [2023-11-24 21:38:06,090 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 392 transitions. Word has length 29 [2023-11-24 21:38:06,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:06,090 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 392 transitions. [2023-11-24 21:38:06,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 392 transitions. [2023-11-24 21:38:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:38:06,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:06,092 INFO L195 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, 1, 1, 1] [2023-11-24 21:38:06,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-24 21:38:06,093 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:06,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:06,094 INFO L85 PathProgramCache]: Analyzing trace with hash 546469545, now seen corresponding path program 1 times [2023-11-24 21:38:06,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:06,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914748221] [2023-11-24 21:38:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:06,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:06,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:06,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:06,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914748221] [2023-11-24 21:38:06,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914748221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:06,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:06,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:38:06,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602223780] [2023-11-24 21:38:06,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:06,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:38:06,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:06,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:38:06,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:06,331 INFO L87 Difference]: Start difference. First operand 302 states and 392 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:06,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:06,537 INFO L93 Difference]: Finished difference Result 308 states and 390 transitions. [2023-11-24 21:38:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:38:06,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-11-24 21:38:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:06,540 INFO L225 Difference]: With dead ends: 308 [2023-11-24 21:38:06,540 INFO L226 Difference]: Without dead ends: 308 [2023-11-24 21:38:06,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:38:06,541 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 266 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:06,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 287 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:38:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-11-24 21:38:06,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 301. [2023-11-24 21:38:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 242 states have (on average 1.537190082644628) internal successors, (372), 288 states have internal predecessors, (372), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 390 transitions. [2023-11-24 21:38:06,558 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 390 transitions. Word has length 29 [2023-11-24 21:38:06,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:06,559 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 390 transitions. [2023-11-24 21:38:06,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:06,559 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 390 transitions. [2023-11-24 21:38:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:38:06,560 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:06,560 INFO L195 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, 1, 1, 1] [2023-11-24 21:38:06,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-24 21:38:06,562 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:06,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:06,562 INFO L85 PathProgramCache]: Analyzing trace with hash 546469706, now seen corresponding path program 1 times [2023-11-24 21:38:06,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:06,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885377594] [2023-11-24 21:38:06,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:06,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:06,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:06,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:06,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885377594] [2023-11-24 21:38:06,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885377594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:06,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:06,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:06,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150538819] [2023-11-24 21:38:06,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:06,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:38:06,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:06,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:38:06,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:38:06,851 INFO L87 Difference]: Start difference. First operand 301 states and 390 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:07,225 INFO L93 Difference]: Finished difference Result 348 states and 413 transitions. [2023-11-24 21:38:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:38:07,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-11-24 21:38:07,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:07,228 INFO L225 Difference]: With dead ends: 348 [2023-11-24 21:38:07,228 INFO L226 Difference]: Without dead ends: 348 [2023-11-24 21:38:07,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:38:07,229 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 146 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:07,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 305 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:38:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-24 21:38:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 301. [2023-11-24 21:38:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 242 states have (on average 1.5289256198347108) internal successors, (370), 288 states have internal predecessors, (370), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-24 21:38:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 388 transitions. [2023-11-24 21:38:07,240 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 388 transitions. Word has length 29 [2023-11-24 21:38:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:07,240 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 388 transitions. [2023-11-24 21:38:07,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:07,241 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 388 transitions. [2023-11-24 21:38:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-24 21:38:07,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:07,242 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:07,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-24 21:38:07,242 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:07,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:07,243 INFO L85 PathProgramCache]: Analyzing trace with hash -977755367, now seen corresponding path program 1 times [2023-11-24 21:38:07,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:07,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633598574] [2023-11-24 21:38:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:07,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:07,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:07,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:07,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633598574] [2023-11-24 21:38:07,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633598574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:07,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:07,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:38:07,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331156180] [2023-11-24 21:38:07,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:07,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:38:07,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:07,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:38:07,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:38:07,798 INFO L87 Difference]: Start difference. First operand 301 states and 388 transitions. Second operand has 11 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:08,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:08,540 INFO L93 Difference]: Finished difference Result 740 states and 953 transitions. [2023-11-24 21:38:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:38:08,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-11-24 21:38:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:08,545 INFO L225 Difference]: With dead ends: 740 [2023-11-24 21:38:08,545 INFO L226 Difference]: Without dead ends: 740 [2023-11-24 21:38:08,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:38:08,547 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 536 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:08,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 873 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:38:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2023-11-24 21:38:08,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 413. [2023-11-24 21:38:08,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 347 states have (on average 1.5014409221902016) internal successors, (521), 396 states have internal predecessors, (521), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-24 21:38:08,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 551 transitions. [2023-11-24 21:38:08,578 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 551 transitions. Word has length 42 [2023-11-24 21:38:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:08,579 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 551 transitions. [2023-11-24 21:38:08,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:08,579 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 551 transitions. [2023-11-24 21:38:08,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-24 21:38:08,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:08,581 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:08,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-24 21:38:08,581 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:08,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:08,582 INFO L85 PathProgramCache]: Analyzing trace with hash -977755366, now seen corresponding path program 1 times [2023-11-24 21:38:08,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:08,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464894492] [2023-11-24 21:38:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:08,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:09,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:09,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:09,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464894492] [2023-11-24 21:38:09,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464894492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:09,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:09,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 21:38:09,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479457298] [2023-11-24 21:38:09,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:09,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:38:09,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:09,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:38:09,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:38:09,259 INFO L87 Difference]: Start difference. First operand 413 states and 551 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:10,121 INFO L93 Difference]: Finished difference Result 782 states and 1009 transitions. [2023-11-24 21:38:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:38:10,122 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-11-24 21:38:10,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:10,127 INFO L225 Difference]: With dead ends: 782 [2023-11-24 21:38:10,127 INFO L226 Difference]: Without dead ends: 782 [2023-11-24 21:38:10,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:38:10,128 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 504 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:10,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 881 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:38:10,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2023-11-24 21:38:10,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 460. [2023-11-24 21:38:10,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 390 states have (on average 1.5256410256410255) internal successors, (595), 441 states have internal predecessors, (595), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-24 21:38:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 631 transitions. [2023-11-24 21:38:10,149 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 631 transitions. Word has length 42 [2023-11-24 21:38:10,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:10,149 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 631 transitions. [2023-11-24 21:38:10,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:10,150 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 631 transitions. [2023-11-24 21:38:10,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-24 21:38:10,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:10,151 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:10,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-24 21:38:10,152 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:10,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:10,152 INFO L85 PathProgramCache]: Analyzing trace with hash -977695785, now seen corresponding path program 1 times [2023-11-24 21:38:10,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:10,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796803583] [2023-11-24 21:38:10,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:10,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:11,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:11,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:11,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796803583] [2023-11-24 21:38:11,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796803583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:11,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:11,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:38:11,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134693187] [2023-11-24 21:38:11,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:11,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:38:11,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:11,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:38:11,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:38:11,217 INFO L87 Difference]: Start difference. First operand 460 states and 631 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:11,862 INFO L93 Difference]: Finished difference Result 482 states and 654 transitions. [2023-11-24 21:38:11,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:38:11,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-11-24 21:38:11,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:11,866 INFO L225 Difference]: With dead ends: 482 [2023-11-24 21:38:11,866 INFO L226 Difference]: Without dead ends: 482 [2023-11-24 21:38:11,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:38:11,867 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 81 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:11,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 670 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:38:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-11-24 21:38:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 474. [2023-11-24 21:38:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 404 states have (on average 1.50990099009901) internal successors, (610), 455 states have internal predecessors, (610), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-24 21:38:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 646 transitions. [2023-11-24 21:38:11,881 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 646 transitions. Word has length 42 [2023-11-24 21:38:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:11,881 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 646 transitions. [2023-11-24 21:38:11,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 646 transitions. [2023-11-24 21:38:11,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-24 21:38:11,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:11,882 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:11,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-11-24 21:38:11,883 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:11,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1208703882, now seen corresponding path program 1 times [2023-11-24 21:38:11,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:11,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236602409] [2023-11-24 21:38:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:11,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:12,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:12,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:12,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236602409] [2023-11-24 21:38:12,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236602409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:12,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:12,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:38:12,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220362666] [2023-11-24 21:38:12,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:12,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:38:12,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:12,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:38:12,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:38:12,527 INFO L87 Difference]: Start difference. First operand 474 states and 646 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:13,111 INFO L93 Difference]: Finished difference Result 544 states and 685 transitions. [2023-11-24 21:38:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:38:13,112 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-11-24 21:38:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:13,116 INFO L225 Difference]: With dead ends: 544 [2023-11-24 21:38:13,116 INFO L226 Difference]: Without dead ends: 544 [2023-11-24 21:38:13,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:38:13,117 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 247 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:13,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 487 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:38:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2023-11-24 21:38:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 477. [2023-11-24 21:38:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 407 states have (on average 1.5036855036855037) internal successors, (612), 458 states have internal predecessors, (612), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-24 21:38:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 648 transitions. [2023-11-24 21:38:13,136 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 648 transitions. Word has length 43 [2023-11-24 21:38:13,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:13,136 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 648 transitions. [2023-11-24 21:38:13,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 648 transitions. [2023-11-24 21:38:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-24 21:38:13,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:13,138 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:13,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-11-24 21:38:13,138 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:13,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:13,139 INFO L85 PathProgramCache]: Analyzing trace with hash 363315233, now seen corresponding path program 1 times [2023-11-24 21:38:13,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:13,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307783606] [2023-11-24 21:38:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:13,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:14,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:14,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:14,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307783606] [2023-11-24 21:38:14,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307783606] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:38:14,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857401864] [2023-11-24 21:38:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:14,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:38:14,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:38:14,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:38:14,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:38:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:14,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-24 21:38:14,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:14,860 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-24 21:38:14,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-24 21:38:15,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-24 21:38:15,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-24 21:38:15,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-24 21:38:15,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-24 21:38:15,524 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-11-24 21:38:15,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-11-24 21:38:15,554 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-11-24 21:38:15,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-11-24 21:38:16,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:38:16,571 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 59 treesize of output 43 [2023-11-24 21:38:16,579 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 39 treesize of output 31 [2023-11-24 21:38:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:16,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:38:17,114 WARN L854 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_279 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_279))) (store .cse0 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse0 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) |c_~#list~0.offset|)) 1)) (forall ((|ULTIMATE.start_create_item_~item~0#1.offset| Int) (v_ArrVal_278 (Array Int Int))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_278))) (store .cse1 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse1 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) |c_~#list~0.offset|) 0))) (forall ((v_ArrVal_279 (Array Int Int))) (let ((.cse2 (select (select (let ((.cse3 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_279))) (store .cse3 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse3 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) |c_~#list~0.offset|))) (or (= .cse2 0) (= (select |c_#valid| .cse2) 1))))) is different from false [2023-11-24 21:38:17,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857401864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:38:17,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:38:17,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2023-11-24 21:38:17,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580742475] [2023-11-24 21:38:17,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:38:17,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:38:17,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:38:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=592, Unknown=3, NotChecked=50, Total=756 [2023-11-24 21:38:17,694 INFO L87 Difference]: Start difference. First operand 477 states and 648 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:38:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:21,475 INFO L93 Difference]: Finished difference Result 1154 states and 1433 transitions. [2023-11-24 21:38:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-24 21:38:21,476 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-11-24 21:38:21,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:21,482 INFO L225 Difference]: With dead ends: 1154 [2023-11-24 21:38:21,482 INFO L226 Difference]: Without dead ends: 1154 [2023-11-24 21:38:21,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=510, Invalid=2571, Unknown=3, NotChecked=108, Total=3192 [2023-11-24 21:38:21,486 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 792 mSDsluCounter, 2242 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2400 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:21,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 2400 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1858 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-24 21:38:21,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2023-11-24 21:38:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 581. [2023-11-24 21:38:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 503 states have (on average 1.502982107355865) internal successors, (756), 557 states have internal predecessors, (756), 16 states have call successors, (16), 8 states have call predecessors, (16), 16 states have return successors, (32), 15 states have call predecessors, (32), 16 states have call successors, (32) [2023-11-24 21:38:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 804 transitions. [2023-11-24 21:38:21,513 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 804 transitions. Word has length 43 [2023-11-24 21:38:21,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:21,513 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 804 transitions. [2023-11-24 21:38:21,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:38:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 804 transitions. [2023-11-24 21:38:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-24 21:38:21,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:21,515 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:21,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:38:21,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-24 21:38:21,721 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:21,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:21,722 INFO L85 PathProgramCache]: Analyzing trace with hash 363374815, now seen corresponding path program 1 times [2023-11-24 21:38:21,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:21,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540200623] [2023-11-24 21:38:21,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:21,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:22,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:22,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:22,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540200623] [2023-11-24 21:38:22,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540200623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:22,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:22,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-24 21:38:22,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045081309] [2023-11-24 21:38:22,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:22,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:38:22,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:22,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:38:22,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:38:22,656 INFO L87 Difference]: Start difference. First operand 581 states and 804 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:23,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:23,611 INFO L93 Difference]: Finished difference Result 601 states and 750 transitions. [2023-11-24 21:38:23,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:38:23,611 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-11-24 21:38:23,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:23,615 INFO L225 Difference]: With dead ends: 601 [2023-11-24 21:38:23,615 INFO L226 Difference]: Without dead ends: 601 [2023-11-24 21:38:23,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2023-11-24 21:38:23,616 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 324 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:23,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 927 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:38:23,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2023-11-24 21:38:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 469. [2023-11-24 21:38:23,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 399 states have (on average 1.5137844611528821) internal successors, (604), 450 states have internal predecessors, (604), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-24 21:38:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 640 transitions. [2023-11-24 21:38:23,631 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 640 transitions. Word has length 43 [2023-11-24 21:38:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:23,632 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 640 transitions. [2023-11-24 21:38:23,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 640 transitions. [2023-11-24 21:38:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 21:38:23,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:23,633 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:23,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-11-24 21:38:23,634 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:23,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:23,634 INFO L85 PathProgramCache]: Analyzing trace with hash -156608335, now seen corresponding path program 1 times [2023-11-24 21:38:23,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:23,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620535140] [2023-11-24 21:38:23,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:23,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:24,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:24,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:24,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620535140] [2023-11-24 21:38:24,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620535140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:24,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:24,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-24 21:38:24,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793699989] [2023-11-24 21:38:24,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:24,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:38:24,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:38:24,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:38:24,319 INFO L87 Difference]: Start difference. First operand 469 states and 640 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:25,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:25,122 INFO L93 Difference]: Finished difference Result 874 states and 1158 transitions. [2023-11-24 21:38:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:38:25,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-11-24 21:38:25,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:25,128 INFO L225 Difference]: With dead ends: 874 [2023-11-24 21:38:25,128 INFO L226 Difference]: Without dead ends: 874 [2023-11-24 21:38:25,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-11-24 21:38:25,129 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 664 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:25,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 888 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:38:25,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2023-11-24 21:38:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 540. [2023-11-24 21:38:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 462 states have (on average 1.4935064935064934) internal successors, (690), 517 states have internal predecessors, (690), 16 states have call successors, (16), 8 states have call predecessors, (16), 16 states have return successors, (32), 14 states have call predecessors, (32), 16 states have call successors, (32) [2023-11-24 21:38:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 738 transitions. [2023-11-24 21:38:25,150 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 738 transitions. Word has length 44 [2023-11-24 21:38:25,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:25,150 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 738 transitions. [2023-11-24 21:38:25,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 738 transitions. [2023-11-24 21:38:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 21:38:25,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:25,151 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:25,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-11-24 21:38:25,152 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:25,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:25,152 INFO L85 PathProgramCache]: Analyzing trace with hash -156608334, now seen corresponding path program 1 times [2023-11-24 21:38:25,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:25,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724204699] [2023-11-24 21:38:25,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:25,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:26,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:26,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:26,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724204699] [2023-11-24 21:38:26,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724204699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:26,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:26,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-24 21:38:26,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785561643] [2023-11-24 21:38:26,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:26,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:38:26,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:26,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:38:26,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:38:26,166 INFO L87 Difference]: Start difference. First operand 540 states and 738 transitions. Second operand has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:27,203 INFO L93 Difference]: Finished difference Result 907 states and 1193 transitions. [2023-11-24 21:38:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:38:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-11-24 21:38:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:27,209 INFO L225 Difference]: With dead ends: 907 [2023-11-24 21:38:27,209 INFO L226 Difference]: Without dead ends: 907 [2023-11-24 21:38:27,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-11-24 21:38:27,210 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 461 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:27,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 1266 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 21:38:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2023-11-24 21:38:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 484. [2023-11-24 21:38:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 414 states have (on average 1.497584541062802) internal successors, (620), 465 states have internal predecessors, (620), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-24 21:38:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 656 transitions. [2023-11-24 21:38:27,228 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 656 transitions. Word has length 44 [2023-11-24 21:38:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:27,228 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 656 transitions. [2023-11-24 21:38:27,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:27,228 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 656 transitions. [2023-11-24 21:38:27,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 21:38:27,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:27,229 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:27,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-11-24 21:38:27,230 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:27,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:27,230 INFO L85 PathProgramCache]: Analyzing trace with hash -156548753, now seen corresponding path program 1 times [2023-11-24 21:38:27,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:27,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372520321] [2023-11-24 21:38:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:27,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:27,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:27,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:27,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372520321] [2023-11-24 21:38:27,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372520321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:27,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:27,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:38:27,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605958942] [2023-11-24 21:38:27,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:27,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:38:27,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:27,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:38:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:38:27,468 INFO L87 Difference]: Start difference. First operand 484 states and 656 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:27,806 INFO L93 Difference]: Finished difference Result 796 states and 1073 transitions. [2023-11-24 21:38:27,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:38:27,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-11-24 21:38:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:27,811 INFO L225 Difference]: With dead ends: 796 [2023-11-24 21:38:27,811 INFO L226 Difference]: Without dead ends: 796 [2023-11-24 21:38:27,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:38:27,812 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 209 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:27,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 490 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:38:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2023-11-24 21:38:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 584. [2023-11-24 21:38:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 498 states have (on average 1.4839357429718876) internal successors, (739), 557 states have internal predecessors, (739), 20 states have call successors, (20), 10 states have call predecessors, (20), 20 states have return successors, (40), 16 states have call predecessors, (40), 20 states have call successors, (40) [2023-11-24 21:38:27,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 799 transitions. [2023-11-24 21:38:27,831 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 799 transitions. Word has length 44 [2023-11-24 21:38:27,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:27,831 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 799 transitions. [2023-11-24 21:38:27,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 799 transitions. [2023-11-24 21:38:27,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 21:38:27,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:27,833 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:27,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-11-24 21:38:27,833 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:27,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:27,834 INFO L85 PathProgramCache]: Analyzing trace with hash -156548752, now seen corresponding path program 1 times [2023-11-24 21:38:27,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:27,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521098676] [2023-11-24 21:38:27,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:27,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:29,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:29,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:29,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521098676] [2023-11-24 21:38:29,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521098676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:38:29,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224480997] [2023-11-24 21:38:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:29,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:38:29,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:38:29,642 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:38:29,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:38:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:29,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-24 21:38:29,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:30,372 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 19 treesize of output 1 [2023-11-24 21:38:30,377 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 19 treesize of output 1 [2023-11-24 21:38:30,704 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:38:30,705 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-24 21:38:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:38:30,711 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2023-11-24 21:38:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:30,757 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:38:30,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224480997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:30,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:38:30,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 27 [2023-11-24 21:38:30,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136119743] [2023-11-24 21:38:30,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:30,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:38:30,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:30,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:38:30,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2023-11-24 21:38:30,759 INFO L87 Difference]: Start difference. First operand 584 states and 799 transitions. Second operand has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:31,490 INFO L93 Difference]: Finished difference Result 931 states and 1275 transitions. [2023-11-24 21:38:31,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:38:31,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-11-24 21:38:31,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:31,496 INFO L225 Difference]: With dead ends: 931 [2023-11-24 21:38:31,496 INFO L226 Difference]: Without dead ends: 931 [2023-11-24 21:38:31,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2023-11-24 21:38:31,498 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 429 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:31,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 709 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:38:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-11-24 21:38:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 785. [2023-11-24 21:38:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 675 states have (on average 1.5096296296296297) internal successors, (1019), 746 states have internal predecessors, (1019), 32 states have call successors, (32), 16 states have call predecessors, (32), 32 states have return successors, (64), 22 states have call predecessors, (64), 32 states have call successors, (64) [2023-11-24 21:38:31,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1115 transitions. [2023-11-24 21:38:31,524 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1115 transitions. Word has length 44 [2023-11-24 21:38:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:31,525 INFO L495 AbstractCegarLoop]: Abstraction has 785 states and 1115 transitions. [2023-11-24 21:38:31,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:31,525 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1115 transitions. [2023-11-24 21:38:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 21:38:31,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:31,526 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:31,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 21:38:31,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384beead-d729-4f9b-988c-37f805f1ff8a/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-24 21:38:31,732 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:31,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:31,732 INFO L85 PathProgramCache]: Analyzing trace with hash 866287478, now seen corresponding path program 1 times [2023-11-24 21:38:31,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:31,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027941619] [2023-11-24 21:38:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:31,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:32,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:32,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:32,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027941619] [2023-11-24 21:38:32,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027941619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:32,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:32,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 21:38:32,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691478649] [2023-11-24 21:38:32,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:32,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:38:32,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:32,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:38:32,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:38:32,081 INFO L87 Difference]: Start difference. First operand 785 states and 1115 transitions. Second operand has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:32,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:32,573 INFO L93 Difference]: Finished difference Result 1119 states and 1576 transitions. [2023-11-24 21:38:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:38:32,574 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-11-24 21:38:32,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:32,580 INFO L225 Difference]: With dead ends: 1119 [2023-11-24 21:38:32,580 INFO L226 Difference]: Without dead ends: 1119 [2023-11-24 21:38:32,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:38:32,581 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 296 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:32,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 663 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:38:32,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2023-11-24 21:38:32,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 833. [2023-11-24 21:38:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 715 states have (on average 1.5034965034965035) internal successors, (1075), 790 states have internal predecessors, (1075), 36 states have call successors, (36), 18 states have call predecessors, (36), 36 states have return successors, (72), 24 states have call predecessors, (72), 36 states have call successors, (72) [2023-11-24 21:38:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1183 transitions. [2023-11-24 21:38:32,616 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1183 transitions. Word has length 44 [2023-11-24 21:38:32,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:32,618 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 1183 transitions. [2023-11-24 21:38:32,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:32,618 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1183 transitions. [2023-11-24 21:38:32,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 21:38:32,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:32,622 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:32,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-11-24 21:38:32,622 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:32,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:32,623 INFO L85 PathProgramCache]: Analyzing trace with hash 866287479, now seen corresponding path program 1 times [2023-11-24 21:38:32,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:32,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525072624] [2023-11-24 21:38:32,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:32,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:33,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-24 21:38:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:33,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:33,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525072624] [2023-11-24 21:38:33,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525072624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:33,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:33,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:38:33,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216451459] [2023-11-24 21:38:33,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:33,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:38:33,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:33,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:38:33,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:38:33,082 INFO L87 Difference]: Start difference. First operand 833 states and 1183 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:33,514 INFO L93 Difference]: Finished difference Result 1170 states and 1634 transitions. [2023-11-24 21:38:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:38:33,514 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-11-24 21:38:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:33,521 INFO L225 Difference]: With dead ends: 1170 [2023-11-24 21:38:33,521 INFO L226 Difference]: Without dead ends: 1170 [2023-11-24 21:38:33,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:38:33,522 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 309 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:33,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 602 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:38:33,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2023-11-24 21:38:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 675. [2023-11-24 21:38:33,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 577 states have (on average 1.511265164644714) internal successors, (872), 642 states have internal predecessors, (872), 26 states have call successors, (26), 13 states have call predecessors, (26), 26 states have return successors, (52), 19 states have call predecessors, (52), 26 states have call successors, (52) [2023-11-24 21:38:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 950 transitions. [2023-11-24 21:38:33,545 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 950 transitions. Word has length 44 [2023-11-24 21:38:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:33,546 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 950 transitions. [2023-11-24 21:38:33,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:38:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 950 transitions. [2023-11-24 21:38:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 21:38:33,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:33,547 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:33,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-11-24 21:38:33,547 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-24 21:38:33,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:33,548 INFO L85 PathProgramCache]: Analyzing trace with hash 866347060, now seen corresponding path program 1 times [2023-11-24 21:38:33,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:33,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136013522] [2023-11-24 21:38:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:33,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat