./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0235-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/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_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0235-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/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_fc162896-38b5-4905-b747-eb773f7843bd/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 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:51:38,242 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:51:38,321 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:51:38,327 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:51:38,328 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:51:38,366 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:51:38,367 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:51:38,367 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:51:38,368 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:51:38,373 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:51:38,374 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:51:38,374 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:51:38,375 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:51:38,377 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:51:38,377 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:51:38,378 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:51:38,378 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:51:38,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:51:38,379 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:51:38,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:51:38,380 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:51:38,380 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:51:38,380 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:51:38,381 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:51:38,381 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:51:38,382 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:51:38,382 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:51:38,383 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:51:38,384 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:51:38,384 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:51:38,385 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:51:38,385 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:51:38,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:51:38,386 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:51:38,386 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:51:38,387 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:51:38,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:51:38,387 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:51:38,387 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:51:38,388 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:51:38,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:51:38,391 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_fc162896-38b5-4905-b747-eb773f7843bd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 [2023-11-24 21:51:38,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:51:38,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:51:38,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:51:38,721 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:51:38,721 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:51:38,722 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/memsafety/test-0235-2.i [2023-11-24 21:51:41,803 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:51:42,124 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:51:42,124 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/sv-benchmarks/c/memsafety/test-0235-2.i [2023-11-24 21:51:42,153 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/data/d27d7c350/7ae75a1397a44879922c27a20c35008c/FLAG224cd371f [2023-11-24 21:51:42,400 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/data/d27d7c350/7ae75a1397a44879922c27a20c35008c [2023-11-24 21:51:42,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:51:42,404 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:51:42,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:51:42,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:51:42,417 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:51:42,421 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:51:42" (1/1) ... [2023-11-24 21:51:42,423 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693f4dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:42, skipping insertion in model container [2023-11-24 21:51:42,423 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:51:42" (1/1) ... [2023-11-24 21:51:42,479 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:51:42,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:51:42,985 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:51:43,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:51:43,111 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:51:43,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:43 WrapperNode [2023-11-24 21:51:43,111 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:51:43,112 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:51:43,112 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:51:43,113 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:51:43,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:43" (1/1) ... [2023-11-24 21:51:43,151 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:43" (1/1) ... [2023-11-24 21:51:43,195 INFO L138 Inliner]: procedures = 188, calls = 71, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 246 [2023-11-24 21:51:43,196 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:51:43,197 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:51:43,197 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:51:43,197 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:51:43,209 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:43" (1/1) ... [2023-11-24 21:51:43,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:43" (1/1) ... [2023-11-24 21:51:43,217 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:43" (1/1) ... [2023-11-24 21:51:43,270 INFO L175 MemorySlicer]: Split 38 memory accesses to 3 slices as follows [26, 2, 10]. 68 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [0, 2, 1]. The 13 writes are split as follows [12, 0, 1]. [2023-11-24 21:51:43,271 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:43" (1/1) ... [2023-11-24 21:51:43,272 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:43" (1/1) ... [2023-11-24 21:51:43,293 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:43" (1/1) ... [2023-11-24 21:51:43,299 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:43" (1/1) ... [2023-11-24 21:51:43,302 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:43" (1/1) ... [2023-11-24 21:51:43,305 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:43" (1/1) ... [2023-11-24 21:51:43,310 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:51:43,311 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:51:43,311 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:51:43,311 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:51:43,312 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:43" (1/1) ... [2023-11-24 21:51:43,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:51:43,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:43,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:51:43,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:51:43,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:51:43,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:51:43,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:51:43,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:51:43,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:51:43,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:51:43,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:51:43,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:51:43,424 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-11-24 21:51:43,424 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-11-24 21:51:43,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:51:43,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-24 21:51:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-24 21:51:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-24 21:51:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2023-11-24 21:51:43,428 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2023-11-24 21:51:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:51:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:51:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:51:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:51:43,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:51:43,670 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:51:43,673 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:51:44,357 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:51:44,444 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:51:44,444 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-24 21:51:44,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:51:44 BoogieIcfgContainer [2023-11-24 21:51:44,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:51:44,449 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:51:44,449 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:51:44,452 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:51:44,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:51:42" (1/3) ... [2023-11-24 21:51:44,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556565a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:51:44, skipping insertion in model container [2023-11-24 21:51:44,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:43" (2/3) ... [2023-11-24 21:51:44,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556565a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:51:44, skipping insertion in model container [2023-11-24 21:51:44,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:51:44" (3/3) ... [2023-11-24 21:51:44,455 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-2.i [2023-11-24 21:51:44,470 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:51:44,471 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2023-11-24 21:51:44,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:51:44,524 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;@4c7e76d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:51:44,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2023-11-24 21:51:44,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 208 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 193 states have internal predecessors, (225), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:51:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 21:51:44,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:44,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 21:51:44,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-24 21:51:44,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:44,548 INFO L85 PathProgramCache]: Analyzing trace with hash 480875, now seen corresponding path program 1 times [2023-11-24 21:51:44,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:44,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393263009] [2023-11-24 21:51:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:44,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:44,697 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 21:51:44,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:44,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393263009] [2023-11-24 21:51:44,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393263009] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:44,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:44,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:51:44,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977618286] [2023-11-24 21:51:44,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:44,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:51:44,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:44,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:51:44,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:51:44,759 INFO L87 Difference]: Start difference. First operand has 208 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 193 states have internal predecessors, (225), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 21:51:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:44,905 INFO L93 Difference]: Finished difference Result 208 states and 238 transitions. [2023-11-24 21:51:44,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:51:44,908 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2023-11-24 21:51:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:44,924 INFO L225 Difference]: With dead ends: 208 [2023-11-24 21:51:44,925 INFO L226 Difference]: Without dead ends: 207 [2023-11-24 21:51:44,927 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 21:51:44,932 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:44,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 214 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:51:44,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-24 21:51:45,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2023-11-24 21:51:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 106 states have (on average 2.009433962264151) internal successors, (213), 192 states have internal predecessors, (213), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:51:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 237 transitions. [2023-11-24 21:51:45,030 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 237 transitions. Word has length 3 [2023-11-24 21:51:45,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:45,031 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 237 transitions. [2023-11-24 21:51:45,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 21:51:45,031 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 237 transitions. [2023-11-24 21:51:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:51:45,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:45,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:51:45,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:51:45,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-24 21:51:45,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:45,034 INFO L85 PathProgramCache]: Analyzing trace with hash 457992285, now seen corresponding path program 1 times [2023-11-24 21:51:45,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:45,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102270340] [2023-11-24 21:51:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:45,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:45,080 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:51:45,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148239558] [2023-11-24 21:51:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:45,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:45,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:45,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:45,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:51:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:45,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:51:45,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:45,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:51:45,330 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 21:51:45,331 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:51:45,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:45,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102270340] [2023-11-24 21:51:45,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:51:45,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148239558] [2023-11-24 21:51:45,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148239558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:45,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:45,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:51:45,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607173337] [2023-11-24 21:51:45,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:45,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:51:45,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:45,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:51:45,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:51:45,338 INFO L87 Difference]: Start difference. First operand 207 states and 237 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:45,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:45,548 INFO L93 Difference]: Finished difference Result 206 states and 236 transitions. [2023-11-24 21:51:45,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:51:45,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-24 21:51:45,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:45,551 INFO L225 Difference]: With dead ends: 206 [2023-11-24 21:51:45,551 INFO L226 Difference]: Without dead ends: 206 [2023-11-24 21:51:45,551 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 21:51:45,553 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 4 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:45,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 359 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:51:45,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-24 21:51:45,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2023-11-24 21:51:45,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 106 states have (on average 2.0) internal successors, (212), 191 states have internal predecessors, (212), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:51:45,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 236 transitions. [2023-11-24 21:51:45,590 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 236 transitions. Word has length 5 [2023-11-24 21:51:45,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:45,592 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 236 transitions. [2023-11-24 21:51:45,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:45,592 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 236 transitions. [2023-11-24 21:51:45,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:51:45,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:45,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:51:45,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:45,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-24 21:51:45,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-24 21:51:45,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:45,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1312859187, now seen corresponding path program 1 times [2023-11-24 21:51:45,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:45,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950044597] [2023-11-24 21:51:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:45,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:45,831 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:51:45,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339027343] [2023-11-24 21:51:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:45,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:45,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:45,835 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:45,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:51:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:45,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:51:45,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:45,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-24 21:51:46,039 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 21:51:46,040 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:51:46,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:46,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950044597] [2023-11-24 21:51:46,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:51:46,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339027343] [2023-11-24 21:51:46,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339027343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:46,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:46,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:51:46,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838959743] [2023-11-24 21:51:46,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:46,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:51:46,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:46,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:51:46,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:51:46,044 INFO L87 Difference]: Start difference. First operand 206 states and 236 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:46,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:46,279 INFO L93 Difference]: Finished difference Result 213 states and 243 transitions. [2023-11-24 21:51:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:51:46,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 21:51:46,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:46,282 INFO L225 Difference]: With dead ends: 213 [2023-11-24 21:51:46,282 INFO L226 Difference]: Without dead ends: 213 [2023-11-24 21:51:46,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 21:51:46,284 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 9 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:46,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 563 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:51:46,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-24 21:51:46,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2023-11-24 21:51:46,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 112 states have (on average 1.9553571428571428) internal successors, (219), 197 states have internal predecessors, (219), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:51:46,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 243 transitions. [2023-11-24 21:51:46,301 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 243 transitions. Word has length 6 [2023-11-24 21:51:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:46,301 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 243 transitions. [2023-11-24 21:51:46,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:46,302 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 243 transitions. [2023-11-24 21:51:46,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-24 21:51:46,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:46,304 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 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 21:51:46,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:46,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-24 21:51:46,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-24 21:51:46,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:46,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1795715578, now seen corresponding path program 1 times [2023-11-24 21:51:46,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:46,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237338201] [2023-11-24 21:51:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:46,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:46,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:51:46,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731814089] [2023-11-24 21:51:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:46,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:46,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:46,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:46,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:51:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:46,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 21:51:46,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:46,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:51:46,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-24 21:51:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-24 21:51:47,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:51:47,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:47,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237338201] [2023-11-24 21:51:47,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:51:47,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731814089] [2023-11-24 21:51:47,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731814089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:47,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:47,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:51:47,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15779446] [2023-11-24 21:51:47,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:47,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:51:47,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:47,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:51:47,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:51:47,165 INFO L87 Difference]: Start difference. First operand 213 states and 243 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:51:51,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-24 21:51:57,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-24 21:51:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:57,417 INFO L93 Difference]: Finished difference Result 221 states and 251 transitions. [2023-11-24 21:51:57,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:51:57,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2023-11-24 21:51:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:57,421 INFO L225 Difference]: With dead ends: 221 [2023-11-24 21:51:57,421 INFO L226 Difference]: Without dead ends: 215 [2023-11-24 21:51:57,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:51:57,423 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 4 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:57,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 770 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 166 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2023-11-24 21:51:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-24 21:51:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2023-11-24 21:51:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 114 states have (on average 1.9385964912280702) internal successors, (221), 199 states have internal predecessors, (221), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:51:57,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 245 transitions. [2023-11-24 21:51:57,439 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 245 transitions. Word has length 55 [2023-11-24 21:51:57,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:57,440 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 245 transitions. [2023-11-24 21:51:57,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:51:57,440 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 245 transitions. [2023-11-24 21:51:57,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-24 21:51:57,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:57,443 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 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 21:51:57,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 21:51:57,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:57,651 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-24 21:51:57,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:57,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1552747876, now seen corresponding path program 1 times [2023-11-24 21:51:57,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:57,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204825307] [2023-11-24 21:51:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:57,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:57,707 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:51:57,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48910166] [2023-11-24 21:51:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:57,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:57,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:57,711 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:57,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:51:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:58,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:51:58,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:58,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-24 21:51:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-24 21:51:58,147 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:51:58,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:58,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204825307] [2023-11-24 21:51:58,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:51:58,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48910166] [2023-11-24 21:51:58,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48910166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:58,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:58,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:51:58,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129151329] [2023-11-24 21:51:58,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:58,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:51:58,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:58,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:51:58,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:51:58,151 INFO L87 Difference]: Start difference. First operand 215 states and 245 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-24 21:51:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:58,391 INFO L93 Difference]: Finished difference Result 214 states and 244 transitions. [2023-11-24 21:51:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:51:58,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2023-11-24 21:51:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:58,394 INFO L225 Difference]: With dead ends: 214 [2023-11-24 21:51:58,394 INFO L226 Difference]: Without dead ends: 214 [2023-11-24 21:51:58,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 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 21:51:58,396 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 9 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:58,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 553 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:51:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-24 21:51:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2023-11-24 21:51:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 114 states have (on average 1.9298245614035088) internal successors, (220), 198 states have internal predecessors, (220), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:51:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2023-11-24 21:51:58,408 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 244 transitions. Word has length 60 [2023-11-24 21:51:58,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:58,409 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 244 transitions. [2023-11-24 21:51:58,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-24 21:51:58,409 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 244 transitions. [2023-11-24 21:51:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-24 21:51:58,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:58,412 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 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 21:51:58,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:58,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:58,620 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-24 21:51:58,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:58,621 INFO L85 PathProgramCache]: Analyzing trace with hash 348624109, now seen corresponding path program 1 times [2023-11-24 21:51:58,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:58,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124297470] [2023-11-24 21:51:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:58,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:58,674 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:51:58,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044696447] [2023-11-24 21:51:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:58,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:58,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:58,677 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:58,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:51:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:58,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-24 21:51:58,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:59,030 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-11-24 21:51:59,084 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-24 21:51:59,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-24 21:51:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 77 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 8 not checked. [2023-11-24 21:51:59,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:51:59,429 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:51:59,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-24 21:51:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 77 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-24 21:51:59,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:59,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124297470] [2023-11-24 21:51:59,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:51:59,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044696447] [2023-11-24 21:51:59,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044696447] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:51:59,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:51:59,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2023-11-24 21:51:59,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541736696] [2023-11-24 21:51:59,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:51:59,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:51:59,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:59,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:51:59,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2023-11-24 21:51:59,463 INFO L87 Difference]: Start difference. First operand 214 states and 244 transitions. Second operand has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 21:52:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:00,149 INFO L93 Difference]: Finished difference Result 304 states and 354 transitions. [2023-11-24 21:52:00,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:52:00,150 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2023-11-24 21:52:00,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:00,154 INFO L225 Difference]: With dead ends: 304 [2023-11-24 21:52:00,154 INFO L226 Difference]: Without dead ends: 304 [2023-11-24 21:52:00,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=166, Unknown=1, NotChecked=26, Total=240 [2023-11-24 21:52:00,155 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 219 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:00,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1131 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 698 Invalid, 0 Unknown, 339 Unchecked, 0.6s Time] [2023-11-24 21:52:00,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-24 21:52:00,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 212. [2023-11-24 21:52:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 114 states have (on average 1.912280701754386) internal successors, (218), 196 states have internal predecessors, (218), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:52:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 242 transitions. [2023-11-24 21:52:00,167 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 242 transitions. Word has length 66 [2023-11-24 21:52:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:00,169 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 242 transitions. [2023-11-24 21:52:00,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 21:52:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 242 transitions. [2023-11-24 21:52:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-24 21:52:00,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:00,178 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 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 21:52:00,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:52:00,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:00,385 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-24 21:52:00,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:00,386 INFO L85 PathProgramCache]: Analyzing trace with hash 348624110, now seen corresponding path program 1 times [2023-11-24 21:52:00,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:00,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199387175] [2023-11-24 21:52:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:00,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:00,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:52:00,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880076909] [2023-11-24 21:52:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:00,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:00,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:52:00,441 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:52:00,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:52:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:00,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 21:52:00,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:52:00,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:52:01,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-24 21:52:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-24 21:52:01,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:52:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-24 21:52:02,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:02,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199387175] [2023-11-24 21:52:02,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:52:02,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880076909] [2023-11-24 21:52:02,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880076909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:52:02,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:52:02,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-24 21:52:02,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862680705] [2023-11-24 21:52:02,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:52:02,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:52:02,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:52:02,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:52:02,198 INFO L87 Difference]: Start difference. First operand 212 states and 242 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-24 21:52:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:04,060 INFO L93 Difference]: Finished difference Result 230 states and 262 transitions. [2023-11-24 21:52:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:52:04,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2023-11-24 21:52:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:04,062 INFO L225 Difference]: With dead ends: 230 [2023-11-24 21:52:04,062 INFO L226 Difference]: Without dead ends: 218 [2023-11-24 21:52:04,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:52:04,063 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 10 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:04,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 770 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:52:04,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-24 21:52:04,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2023-11-24 21:52:04,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 120 states have (on average 1.8666666666666667) internal successors, (224), 202 states have internal predecessors, (224), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:52:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 248 transitions. [2023-11-24 21:52:04,074 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 248 transitions. Word has length 66 [2023-11-24 21:52:04,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:04,074 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 248 transitions. [2023-11-24 21:52:04,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-24 21:52:04,075 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 248 transitions. [2023-11-24 21:52:04,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-24 21:52:04,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:04,076 INFO L195 NwaCegarLoop]: trace histogram [24, 6, 6, 6, 6, 6, 6, 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 21:52:04,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:52:04,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:04,283 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-24 21:52:04,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:04,284 INFO L85 PathProgramCache]: Analyzing trace with hash -676548296, now seen corresponding path program 2 times [2023-11-24 21:52:04,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:04,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073391585] [2023-11-24 21:52:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:04,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:04,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:52:04,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004306300] [2023-11-24 21:52:04,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:52:04,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:04,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:52:04,339 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:52:04,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:52:06,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:52:06,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:52:06,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-24 21:52:06,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:52:06,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:52:06,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-24 21:52:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 259 proven. 96 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2023-11-24 21:52:06,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:52:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 120 proven. 40 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2023-11-24 21:52:07,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:07,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073391585] [2023-11-24 21:52:07,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:52:07,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004306300] [2023-11-24 21:52:07,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004306300] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:52:07,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:52:07,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-11-24 21:52:07,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012825664] [2023-11-24 21:52:07,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:52:07,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:52:07,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:52:07,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:52:07,433 INFO L87 Difference]: Start difference. First operand 218 states and 248 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:52:08,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:08,589 INFO L93 Difference]: Finished difference Result 232 states and 264 transitions. [2023-11-24 21:52:08,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:52:08,589 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 84 [2023-11-24 21:52:08,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:08,591 INFO L225 Difference]: With dead ends: 232 [2023-11-24 21:52:08,591 INFO L226 Difference]: Without dead ends: 223 [2023-11-24 21:52:08,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 21:52:08,593 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 26 mSDsluCounter, 2137 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2343 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:08,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2343 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:52:08,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-11-24 21:52:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2023-11-24 21:52:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 125 states have (on average 1.832) internal successors, (229), 207 states have internal predecessors, (229), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:52:08,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 253 transitions. [2023-11-24 21:52:08,628 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 253 transitions. Word has length 84 [2023-11-24 21:52:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:08,628 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 253 transitions. [2023-11-24 21:52:08,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:52:08,628 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 253 transitions. [2023-11-24 21:52:08,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-24 21:52:08,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:08,632 INFO L195 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 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 21:52:08,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:52:08,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:08,833 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-24 21:52:08,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:08,834 INFO L85 PathProgramCache]: Analyzing trace with hash -212285168, now seen corresponding path program 3 times [2023-11-24 21:52:08,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:08,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313146188] [2023-11-24 21:52:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:08,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:08,910 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:52:08,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156630769] [2023-11-24 21:52:08,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:52:08,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:08,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:52:08,927 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:52:08,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:52:09,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 21:52:09,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:52:09,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-24 21:52:09,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:52:10,051 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-24 21:52:10,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:52:10,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-24 21:52:10,153 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:52:10,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 21:52:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 585 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 59 not checked. [2023-11-24 21:52:10,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:52:10,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:10,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313146188] [2023-11-24 21:52:10,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:52:10,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156630769] [2023-11-24 21:52:10,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156630769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:52:10,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:52:10,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-24 21:52:10,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640789452] [2023-11-24 21:52:10,324 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 21:52:10,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:52:10,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:10,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:52:10,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2023-11-24 21:52:10,326 INFO L87 Difference]: Start difference. First operand 223 states and 253 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:52:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:11,999 INFO L93 Difference]: Finished difference Result 313 states and 363 transitions. [2023-11-24 21:52:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:52:11,999 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 105 [2023-11-24 21:52:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:12,002 INFO L225 Difference]: With dead ends: 313 [2023-11-24 21:52:12,002 INFO L226 Difference]: Without dead ends: 313 [2023-11-24 21:52:12,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=227, Unknown=1, NotChecked=30, Total=306 [2023-11-24 21:52:12,003 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 118 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:12,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 437 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1605 Invalid, 0 Unknown, 336 Unchecked, 1.5s Time] [2023-11-24 21:52:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-11-24 21:52:12,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 221. [2023-11-24 21:52:12,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 125 states have (on average 1.816) internal successors, (227), 205 states have internal predecessors, (227), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:52:12,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 251 transitions. [2023-11-24 21:52:12,015 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 251 transitions. Word has length 105 [2023-11-24 21:52:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:12,016 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 251 transitions. [2023-11-24 21:52:12,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:52:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 251 transitions. [2023-11-24 21:52:12,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-24 21:52:12,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:12,018 INFO L195 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 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 21:52:12,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:52:12,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:12,224 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-24 21:52:12,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash 2009100570, now seen corresponding path program 1 times [2023-11-24 21:52:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:12,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470796938] [2023-11-24 21:52:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:12,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:12,291 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:52:12,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315888437] [2023-11-24 21:52:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:12,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:12,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:52:12,293 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:52:12,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:52:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:12,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-24 21:52:12,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:52:12,894 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-11-24 21:52:12,933 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-24 21:52:12,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-24 21:52:12,996 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-24 21:52:12,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-24 21:52:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 701 proven. 2 refuted. 0 times theorem prover too weak. 519 trivial. 143 not checked. [2023-11-24 21:52:13,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:52:13,461 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:52:13,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-24 21:52:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 701 proven. 145 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2023-11-24 21:52:13,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:13,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470796938] [2023-11-24 21:52:13,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:52:13,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315888437] [2023-11-24 21:52:13,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315888437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:52:13,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:52:13,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2023-11-24 21:52:13,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691516693] [2023-11-24 21:52:13,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:52:13,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:52:13,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:13,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:52:13,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2023-11-24 21:52:13,498 INFO L87 Difference]: Start difference. First operand 221 states and 251 transitions. Second operand has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:52:14,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:14,327 INFO L93 Difference]: Finished difference Result 310 states and 360 transitions. [2023-11-24 21:52:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:52:14,327 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 106 [2023-11-24 21:52:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:14,330 INFO L225 Difference]: With dead ends: 310 [2023-11-24 21:52:14,330 INFO L226 Difference]: Without dead ends: 310 [2023-11-24 21:52:14,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 191 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=222, Unknown=1, NotChecked=30, Total=306 [2023-11-24 21:52:14,331 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 332 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:14,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 1439 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 973 Invalid, 0 Unknown, 334 Unchecked, 0.7s Time] [2023-11-24 21:52:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-11-24 21:52:14,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 218. [2023-11-24 21:52:14,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 125 states have (on average 1.792) internal successors, (224), 202 states have internal predecessors, (224), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:52:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 248 transitions. [2023-11-24 21:52:14,342 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 248 transitions. Word has length 106 [2023-11-24 21:52:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:14,343 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 248 transitions. [2023-11-24 21:52:14,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:52:14,344 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 248 transitions. [2023-11-24 21:52:14,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-24 21:52:14,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:14,345 INFO L195 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 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 21:52:14,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:52:14,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 21:52:14,560 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-24 21:52:14,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:14,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2009100571, now seen corresponding path program 1 times [2023-11-24 21:52:14,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:14,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968560430] [2023-11-24 21:52:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:14,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:14,622 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:52:14,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162331188] [2023-11-24 21:52:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:14,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:14,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:52:14,624 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:52:14,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc162896-38b5-4905-b747-eb773f7843bd/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:52:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:15,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-24 21:52:15,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:52:15,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:52:36,029 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-24 21:52:36,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:52:36,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-24 21:52:36,205 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 21:52:36,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-24 21:52:36,531 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-24 21:52:37,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:52:37,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-24 21:52:38,044 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:52:38,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 21:52:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 591 proven. 287 refuted. 0 times theorem prover too weak. 292 trivial. 195 not checked. [2023-11-24 21:52:38,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:52:39,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:39,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968560430] [2023-11-24 21:52:39,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:52:39,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162331188] [2023-11-24 21:52:39,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162331188] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:52:39,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:52:39,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2023-11-24 21:52:39,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804162958] [2023-11-24 21:52:39,360 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 21:52:39,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-24 21:52:39,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:39,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-24 21:52:39,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=850, Unknown=5, NotChecked=118, Total=1056 [2023-11-24 21:52:39,363 INFO L87 Difference]: Start difference. First operand 218 states and 248 transitions. Second operand has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)