./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/loops/string-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a 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_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loops/string-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU --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 7c71ebd98a3b6e7de0397eeeb86fda8d96b2d4c8ea0b8e1766ce392ff80613de --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:15:05,346 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:15:05,453 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:15:05,462 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:15:05,462 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:15:05,517 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:15:05,518 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:15:05,518 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:15:05,520 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:15:05,522 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:15:05,523 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:15:05,523 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:15:05,525 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:15:05,526 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:15:05,527 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:15:05,530 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:15:05,531 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:15:05,531 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:15:05,532 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:15:05,532 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:15:05,533 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:15:05,533 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:15:05,534 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:15:05,535 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:15:05,536 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:15:05,536 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:15:05,537 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:15:05,537 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:15:05,537 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:15:05,538 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:15:05,538 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:15:05,539 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:15:05,540 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:15:05,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:15:05,548 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:15:05,548 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:15:05,548 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:15:05,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:15:05,549 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:15:05,549 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:15:05,549 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:15:05,551 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:15:05,551 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_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c71ebd98a3b6e7de0397eeeb86fda8d96b2d4c8ea0b8e1766ce392ff80613de [2024-10-31 22:15:05,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:15:05,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:15:05,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:15:05,915 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:15:05,916 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:15:05,917 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/loops/string-1.i Unable to find full path for "g++" [2024-10-31 22:15:08,097 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:15:08,269 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:15:08,270 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/sv-benchmarks/c/loops/string-1.i [2024-10-31 22:15:08,278 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/data/1654b8615/365864e5844a42b09a8fa3151a44d101/FLAG8ad143658 [2024-10-31 22:15:08,301 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/data/1654b8615/365864e5844a42b09a8fa3151a44d101 [2024-10-31 22:15:08,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:15:08,306 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:15:08,313 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:15:08,317 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:15:08,330 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:15:08,330 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:15:08" (1/1) ... [2024-10-31 22:15:08,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24fb73cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08, skipping insertion in model container [2024-10-31 22:15:08,345 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:15:08" (1/1) ... [2024-10-31 22:15:08,404 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:15:08,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:15:08,640 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:15:08,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:15:08,681 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:15:08,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08 WrapperNode [2024-10-31 22:15:08,682 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:15:08,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:15:08,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:15:08,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:15:08,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08" (1/1) ... [2024-10-31 22:15:08,698 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08" (1/1) ... [2024-10-31 22:15:08,719 INFO L138 Inliner]: procedures = 17, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2024-10-31 22:15:08,720 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:15:08,720 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:15:08,721 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:15:08,721 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:15:08,738 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08" (1/1) ... [2024-10-31 22:15:08,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08" (1/1) ... [2024-10-31 22:15:08,741 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08" (1/1) ... [2024-10-31 22:15:08,778 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-10-31 22:15:08,778 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08" (1/1) ... [2024-10-31 22:15:08,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08" (1/1) ... [2024-10-31 22:15:08,797 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08" (1/1) ... [2024-10-31 22:15:08,806 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08" (1/1) ... [2024-10-31 22:15:08,812 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08" (1/1) ... [2024-10-31 22:15:08,813 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08" (1/1) ... [2024-10-31 22:15:08,819 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:15:08,820 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:15:08,820 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:15:08,820 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:15:08,825 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08" (1/1) ... [2024-10-31 22:15:08,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:15:08,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:08,895 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:15:08,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:15:08,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:15:08,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:15:08,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:15:08,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:15:08,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:15:08,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:15:08,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:15:08,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:15:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:15:08,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:15:08,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:15:08,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:15:08,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:15:08,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:15:09,025 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:15:09,028 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:15:09,330 INFO L? ?]: Removed 51 outVars from TransFormulas that were not future-live. [2024-10-31 22:15:09,335 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:15:09,367 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:15:09,367 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-10-31 22:15:09,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:15:09 BoogieIcfgContainer [2024-10-31 22:15:09,368 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:15:09,371 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:15:09,371 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:15:09,374 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:15:09,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:15:08" (1/3) ... [2024-10-31 22:15:09,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d64f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:15:09, skipping insertion in model container [2024-10-31 22:15:09,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:08" (2/3) ... [2024-10-31 22:15:09,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d64f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:15:09, skipping insertion in model container [2024-10-31 22:15:09,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:15:09" (3/3) ... [2024-10-31 22:15:09,378 INFO L112 eAbstractionObserver]: Analyzing ICFG string-1.i [2024-10-31 22:15:09,400 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:15:09,400 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-10-31 22:15:09,455 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:15:09,479 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5eebad0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:15:09,479 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-31 22:15:09,491 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 31 states have (on average 2.096774193548387) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:09,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-31 22:15:09,501 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:09,501 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-31 22:15:09,502 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:09,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:09,516 INFO L85 PathProgramCache]: Analyzing trace with hash 925990, now seen corresponding path program 1 times [2024-10-31 22:15:09,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:09,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354770081] [2024-10-31 22:15:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:09,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:09,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:09,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354770081] [2024-10-31 22:15:09,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354770081] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:09,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:09,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:15:09,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573186468] [2024-10-31 22:15:09,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:09,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:15:09,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:09,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:15:09,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:15:09,766 INFO L87 Difference]: Start difference. First operand has 50 states, 31 states have (on average 2.096774193548387) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:09,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:09,784 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2024-10-31 22:15:09,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:15:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-31 22:15:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:09,799 INFO L225 Difference]: With dead ends: 49 [2024-10-31 22:15:09,799 INFO L226 Difference]: Without dead ends: 47 [2024-10-31 22:15:09,801 INFO L431 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 [2024-10-31 22:15:09,809 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:09,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:15:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-31 22:15:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-10-31 22:15:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.896551724137931) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-10-31 22:15:09,859 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 4 [2024-10-31 22:15:09,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:09,859 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-10-31 22:15:09,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-10-31 22:15:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-31 22:15:09,862 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:09,862 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-31 22:15:09,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:15:09,864 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:09,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:09,865 INFO L85 PathProgramCache]: Analyzing trace with hash 925711, now seen corresponding path program 1 times [2024-10-31 22:15:09,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:09,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403673938] [2024-10-31 22:15:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:09,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:10,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:10,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403673938] [2024-10-31 22:15:10,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403673938] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:10,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:10,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:15:10,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047332895] [2024-10-31 22:15:10,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:10,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:15:10,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:10,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:15:10,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:15:10,015 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:10,127 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2024-10-31 22:15:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:15:10,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-31 22:15:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:10,130 INFO L225 Difference]: With dead ends: 62 [2024-10-31 22:15:10,131 INFO L226 Difference]: Without dead ends: 62 [2024-10-31 22:15:10,131 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:15:10,133 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:10,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 77 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:10,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-31 22:15:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2024-10-31 22:15:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:10,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2024-10-31 22:15:10,146 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 4 [2024-10-31 22:15:10,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:10,147 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2024-10-31 22:15:10,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:10,147 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2024-10-31 22:15:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-31 22:15:10,149 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:10,150 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-31 22:15:10,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:15:10,151 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:10,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:10,152 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2024-10-31 22:15:10,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:10,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923669515] [2024-10-31 22:15:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:10,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:10,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:10,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923669515] [2024-10-31 22:15:10,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923669515] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:10,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:10,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:15:10,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61532461] [2024-10-31 22:15:10,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:10,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:15:10,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:15:10,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:15:10,375 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:10,471 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2024-10-31 22:15:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:15:10,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-31 22:15:10,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:10,476 INFO L225 Difference]: With dead ends: 45 [2024-10-31 22:15:10,476 INFO L226 Difference]: Without dead ends: 45 [2024-10-31 22:15:10,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:15:10,478 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:10,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 31 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-31 22:15:10,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-31 22:15:10,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:10,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-10-31 22:15:10,494 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 4 [2024-10-31 22:15:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:10,494 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-10-31 22:15:10,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:10,494 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-10-31 22:15:10,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-31 22:15:10,503 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:10,503 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-31 22:15:10,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:15:10,503 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:10,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:10,504 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2024-10-31 22:15:10,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:10,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615369103] [2024-10-31 22:15:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:10,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:10,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:10,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615369103] [2024-10-31 22:15:10,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615369103] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:10,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:10,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:15:10,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893242609] [2024-10-31 22:15:10,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:10,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:15:10,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:15:10,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:15:10,760 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:10,838 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2024-10-31 22:15:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:15:10,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-31 22:15:10,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:10,839 INFO L225 Difference]: With dead ends: 47 [2024-10-31 22:15:10,839 INFO L226 Difference]: Without dead ends: 47 [2024-10-31 22:15:10,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:15:10,841 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:10,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 65 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-31 22:15:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-10-31 22:15:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.6875) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2024-10-31 22:15:10,847 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 4 [2024-10-31 22:15:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:10,848 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2024-10-31 22:15:10,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2024-10-31 22:15:10,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-31 22:15:10,849 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:10,849 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:10,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:15:10,849 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:10,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:10,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1809646232, now seen corresponding path program 1 times [2024-10-31 22:15:10,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:10,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865963504] [2024-10-31 22:15:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:10,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:10,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:10,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865963504] [2024-10-31 22:15:10,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865963504] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:10,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529127019] [2024-10-31 22:15:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:10,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:10,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:10,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:10,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:15:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:10,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 22:15:10,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:11,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:11,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529127019] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:11,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:11,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-31 22:15:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125250202] [2024-10-31 22:15:11,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:11,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:15:11,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:11,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:15:11,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:15:11,086 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:11,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:11,254 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2024-10-31 22:15:11,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:15:11,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-31 22:15:11,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:11,257 INFO L225 Difference]: With dead ends: 90 [2024-10-31 22:15:11,257 INFO L226 Difference]: Without dead ends: 90 [2024-10-31 22:15:11,257 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:15:11,258 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 44 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:11,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 143 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:11,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-31 22:15:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2024-10-31 22:15:11,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 62 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2024-10-31 22:15:11,268 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 7 [2024-10-31 22:15:11,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:11,269 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2024-10-31 22:15:11,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:11,269 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2024-10-31 22:15:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-31 22:15:11,270 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:11,270 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-31 22:15:11,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:15:11,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:11,471 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:11,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1809646286, now seen corresponding path program 1 times [2024-10-31 22:15:11,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:11,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601339776] [2024-10-31 22:15:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:11,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:11,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:11,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601339776] [2024-10-31 22:15:11,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601339776] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:11,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271060150] [2024-10-31 22:15:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:11,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:11,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:11,641 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:11,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:15:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:11,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:15:11,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:11,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-31 22:15:11,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:15:11,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-31 22:15:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:11,916 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:12,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271060150] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:12,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:12,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-10-31 22:15:12,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124651961] [2024-10-31 22:15:12,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:12,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:15:12,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:12,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:15:12,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:15:12,030 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:12,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:12,199 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2024-10-31 22:15:12,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:15:12,200 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-31 22:15:12,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:12,201 INFO L225 Difference]: With dead ends: 64 [2024-10-31 22:15:12,201 INFO L226 Difference]: Without dead ends: 64 [2024-10-31 22:15:12,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:15:12,205 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:12,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 95 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:12,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-31 22:15:12,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-10-31 22:15:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.56) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:12,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2024-10-31 22:15:12,216 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 7 [2024-10-31 22:15:12,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:12,216 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2024-10-31 22:15:12,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:12,217 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2024-10-31 22:15:12,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 22:15:12,217 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:12,217 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2024-10-31 22:15:12,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:15:12,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:12,418 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:12,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:12,419 INFO L85 PathProgramCache]: Analyzing trace with hash -116849136, now seen corresponding path program 2 times [2024-10-31 22:15:12,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:12,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423541110] [2024-10-31 22:15:12,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:12,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:12,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:12,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423541110] [2024-10-31 22:15:12,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423541110] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:12,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832650462] [2024-10-31 22:15:12,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:15:12,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:12,562 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:12,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:15:12,625 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:15:12,625 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:12,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:15:12,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:12,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-31 22:15:12,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:15:12,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-31 22:15:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-31 22:15:12,757 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:15:12,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832650462] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:12,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:15:12,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2024-10-31 22:15:12,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039091147] [2024-10-31 22:15:12,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:12,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:15:12,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:12,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:15:12,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:15:12,760 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:12,805 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2024-10-31 22:15:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:15:12,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-31 22:15:12,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:12,806 INFO L225 Difference]: With dead ends: 63 [2024-10-31 22:15:12,807 INFO L226 Difference]: Without dead ends: 63 [2024-10-31 22:15:12,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:15:12,808 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 36 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:12,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 32 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:15:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-31 22:15:12,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-10-31 22:15:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.54) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2024-10-31 22:15:12,813 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 16 [2024-10-31 22:15:12,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:12,814 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2024-10-31 22:15:12,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2024-10-31 22:15:12,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 22:15:12,815 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:12,815 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2024-10-31 22:15:12,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:15:13,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:13,016 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:13,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:13,016 INFO L85 PathProgramCache]: Analyzing trace with hash -116849082, now seen corresponding path program 2 times [2024-10-31 22:15:13,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:13,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564791785] [2024-10-31 22:15:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:13,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:13,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:13,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564791785] [2024-10-31 22:15:13,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564791785] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:13,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951892620] [2024-10-31 22:15:13,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:15:13,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:13,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:13,287 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:13,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:15:13,364 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:15:13,365 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:13,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:15:13,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:13,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-31 22:15:13,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:15:13,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-31 22:15:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:13,606 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:13,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951892620] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:13,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:13,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-10-31 22:15:13,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813889471] [2024-10-31 22:15:13,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:13,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:15:13,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:13,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:15:13,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:15:13,826 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:14,130 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2024-10-31 22:15:14,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:15:14,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-31 22:15:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:14,132 INFO L225 Difference]: With dead ends: 67 [2024-10-31 22:15:14,132 INFO L226 Difference]: Without dead ends: 67 [2024-10-31 22:15:14,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:15:14,133 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:14,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 179 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:15:14,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-31 22:15:14,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-10-31 22:15:14,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.509433962264151) internal successors, (80), 65 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2024-10-31 22:15:14,145 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 16 [2024-10-31 22:15:14,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:14,145 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2024-10-31 22:15:14,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:14,145 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2024-10-31 22:15:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-31 22:15:14,145 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:14,146 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1] [2024-10-31 22:15:14,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:15:14,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:14,347 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:14,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2127536946, now seen corresponding path program 3 times [2024-10-31 22:15:14,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:14,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669915850] [2024-10-31 22:15:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:14,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:14,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:14,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669915850] [2024-10-31 22:15:14,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669915850] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:14,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119818930] [2024-10-31 22:15:14,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:15:14,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:14,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:14,475 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:14,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:15:14,538 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 22:15:14,538 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:14,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 22:15:14,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:14,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-31 22:15:14,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:15:14,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-31 22:15:14,733 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-31 22:15:14,734 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:15:14,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119818930] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:14,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:15:14,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2024-10-31 22:15:14,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169847272] [2024-10-31 22:15:14,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:14,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:15:14,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:14,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:15:14,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:15:14,737 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:14,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:14,839 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2024-10-31 22:15:14,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:15:14,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-31 22:15:14,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:14,840 INFO L225 Difference]: With dead ends: 71 [2024-10-31 22:15:14,840 INFO L226 Difference]: Without dead ends: 71 [2024-10-31 22:15:14,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:15:14,841 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:14,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-31 22:15:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2024-10-31 22:15:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.5) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2024-10-31 22:15:14,850 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 19 [2024-10-31 22:15:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:14,851 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2024-10-31 22:15:14,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2024-10-31 22:15:14,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-31 22:15:14,852 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:14,852 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:14,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:15:15,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:15,056 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:15,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:15,060 INFO L85 PathProgramCache]: Analyzing trace with hash -158625150, now seen corresponding path program 1 times [2024-10-31 22:15:15,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:15,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477401970] [2024-10-31 22:15:15,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:15,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:15,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:15,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477401970] [2024-10-31 22:15:15,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477401970] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:15,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:15,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:15:15,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33351063] [2024-10-31 22:15:15,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:15,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:15,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:15,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:15,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:15,312 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:15,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:15,377 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2024-10-31 22:15:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:15:15,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-31 22:15:15,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:15,379 INFO L225 Difference]: With dead ends: 63 [2024-10-31 22:15:15,379 INFO L226 Difference]: Without dead ends: 61 [2024-10-31 22:15:15,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:15,380 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 27 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:15,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 50 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:15,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-31 22:15:15,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-10-31 22:15:15,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.44) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2024-10-31 22:15:15,384 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 21 [2024-10-31 22:15:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:15,384 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2024-10-31 22:15:15,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2024-10-31 22:15:15,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-31 22:15:15,386 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:15,386 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:15,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:15:15,386 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:15,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:15,387 INFO L85 PathProgramCache]: Analyzing trace with hash -622413434, now seen corresponding path program 1 times [2024-10-31 22:15:15,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:15,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414601062] [2024-10-31 22:15:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:15,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:15,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:15,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414601062] [2024-10-31 22:15:15,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414601062] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:15,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:15,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:15:15,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833249031] [2024-10-31 22:15:15,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:15,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:15:15,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:15,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:15:15,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:15:15,446 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:15,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:15,482 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2024-10-31 22:15:15,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:15:15,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-31 22:15:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:15,483 INFO L225 Difference]: With dead ends: 57 [2024-10-31 22:15:15,483 INFO L226 Difference]: Without dead ends: 57 [2024-10-31 22:15:15,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:15:15,484 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:15,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 27 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:15:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-31 22:15:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-10-31 22:15:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.3) internal successors, (65), 56 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2024-10-31 22:15:15,492 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 22 [2024-10-31 22:15:15,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:15,492 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2024-10-31 22:15:15,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:15,496 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2024-10-31 22:15:15,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-31 22:15:15,496 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:15,496 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:15,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:15:15,497 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:15,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:15,497 INFO L85 PathProgramCache]: Analyzing trace with hash -622413433, now seen corresponding path program 1 times [2024-10-31 22:15:15,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:15,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433324568] [2024-10-31 22:15:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:15,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:15,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:15,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433324568] [2024-10-31 22:15:15,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433324568] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:15,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:15,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:15:15,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310587236] [2024-10-31 22:15:15,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:15,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:15,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:15,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:15,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:15,660 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:15,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:15,734 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2024-10-31 22:15:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:15:15,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-31 22:15:15,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:15,735 INFO L225 Difference]: With dead ends: 60 [2024-10-31 22:15:15,735 INFO L226 Difference]: Without dead ends: 60 [2024-10-31 22:15:15,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:15,736 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:15,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 28 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:15,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-31 22:15:15,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2024-10-31 22:15:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.26) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2024-10-31 22:15:15,739 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 22 [2024-10-31 22:15:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:15,740 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2024-10-31 22:15:15,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2024-10-31 22:15:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-31 22:15:15,741 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:15,741 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:15,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:15:15,741 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:15,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:15,742 INFO L85 PathProgramCache]: Analyzing trace with hash -944786683, now seen corresponding path program 1 times [2024-10-31 22:15:15,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:15,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958572728] [2024-10-31 22:15:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:15,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:15,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:15,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958572728] [2024-10-31 22:15:15,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958572728] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:15,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755563732] [2024-10-31 22:15:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:15,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:15,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:15,877 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:15,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:15:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:15,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:15:15,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:15,970 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 [2024-10-31 22:15:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:16,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:16,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755563732] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:16,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:16,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-10-31 22:15:16,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120177271] [2024-10-31 22:15:16,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:16,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:15:16,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:16,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:15:16,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:15:16,278 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:16,499 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2024-10-31 22:15:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:15:16,500 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-31 22:15:16,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:16,501 INFO L225 Difference]: With dead ends: 73 [2024-10-31 22:15:16,501 INFO L226 Difference]: Without dead ends: 73 [2024-10-31 22:15:16,501 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:15:16,503 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 98 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:16,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 50 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:15:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-31 22:15:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2024-10-31 22:15:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2024-10-31 22:15:16,509 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 25 [2024-10-31 22:15:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:16,509 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2024-10-31 22:15:16,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2024-10-31 22:15:16,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-31 22:15:16,510 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:16,511 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:16,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:15:16,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-31 22:15:16,715 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:16,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:16,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2039375865, now seen corresponding path program 2 times [2024-10-31 22:15:16,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:16,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184622202] [2024-10-31 22:15:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:16,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:16,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:16,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184622202] [2024-10-31 22:15:16,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184622202] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:16,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123075601] [2024-10-31 22:15:16,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:15:16,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:16,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:16,978 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:16,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:15:17,073 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:15:17,073 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:17,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 22:15:17,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:17,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-31 22:15:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:17,368 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:15:17,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123075601] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:17,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:15:17,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2024-10-31 22:15:17,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790493304] [2024-10-31 22:15:17,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:17,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:15:17,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:17,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:15:17,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:15:17,370 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:17,576 INFO L93 Difference]: Finished difference Result 77 states and 102 transitions. [2024-10-31 22:15:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:15:17,577 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-10-31 22:15:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:17,578 INFO L225 Difference]: With dead ends: 77 [2024-10-31 22:15:17,578 INFO L226 Difference]: Without dead ends: 77 [2024-10-31 22:15:17,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:15:17,579 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:17,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 26 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:15:17,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-31 22:15:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2024-10-31 22:15:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.2) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2024-10-31 22:15:17,587 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 34 [2024-10-31 22:15:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:17,587 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2024-10-31 22:15:17,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2024-10-31 22:15:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-31 22:15:17,588 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:17,588 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:17,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:15:17,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-31 22:15:17,789 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:17,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:17,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1335171498, now seen corresponding path program 1 times [2024-10-31 22:15:17,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:17,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581443854] [2024-10-31 22:15:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:17,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-31 22:15:17,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:17,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581443854] [2024-10-31 22:15:17,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581443854] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:17,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844976175] [2024-10-31 22:15:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:17,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:17,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:17,972 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:17,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:15:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:18,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:15:18,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:18,154 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:18,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844976175] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:18,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:18,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 11 [2024-10-31 22:15:18,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104822010] [2024-10-31 22:15:18,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:18,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:15:18,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:18,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:15:18,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:15:18,233 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:18,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:18,476 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2024-10-31 22:15:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:15:18,477 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 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 36 [2024-10-31 22:15:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:18,477 INFO L225 Difference]: With dead ends: 91 [2024-10-31 22:15:18,477 INFO L226 Difference]: Without dead ends: 91 [2024-10-31 22:15:18,478 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:15:18,478 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:18,479 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 49 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:15:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-31 22:15:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 67. [2024-10-31 22:15:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 66 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2024-10-31 22:15:18,485 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 36 [2024-10-31 22:15:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:18,485 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2024-10-31 22:15:18,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2024-10-31 22:15:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 22:15:18,486 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:18,486 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:18,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 22:15:18,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-31 22:15:18,687 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:18,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:18,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1969428851, now seen corresponding path program 1 times [2024-10-31 22:15:18,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:18,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040983658] [2024-10-31 22:15:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:18,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-31 22:15:18,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:18,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040983658] [2024-10-31 22:15:18,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040983658] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:18,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119133563] [2024-10-31 22:15:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:18,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:18,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:18,895 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:18,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:15:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:19,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:15:19,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:19,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:19,534 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 22 treesize of output 18 [2024-10-31 22:15:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:19,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119133563] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:19,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:19,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 21 [2024-10-31 22:15:19,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627273040] [2024-10-31 22:15:19,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:19,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 22:15:19,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:19,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 22:15:19,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2024-10-31 22:15:19,715 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:20,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:20,721 INFO L93 Difference]: Finished difference Result 138 states and 182 transitions. [2024-10-31 22:15:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-31 22:15:20,721 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-10-31 22:15:20,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:20,722 INFO L225 Difference]: With dead ends: 138 [2024-10-31 22:15:20,722 INFO L226 Difference]: Without dead ends: 138 [2024-10-31 22:15:20,723 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=1284, Unknown=0, NotChecked=0, Total=1806 [2024-10-31 22:15:20,724 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 330 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:20,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 91 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 22:15:20,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-10-31 22:15:20,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2024-10-31 22:15:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 81 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2024-10-31 22:15:20,732 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 41 [2024-10-31 22:15:20,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:20,732 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2024-10-31 22:15:20,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:20,733 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2024-10-31 22:15:20,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-31 22:15:20,735 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:20,735 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:20,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:15:20,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-31 22:15:20,937 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:20,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:20,938 INFO L85 PathProgramCache]: Analyzing trace with hash -922753807, now seen corresponding path program 1 times [2024-10-31 22:15:20,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:20,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161022517] [2024-10-31 22:15:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:20,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-31 22:15:21,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:21,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161022517] [2024-10-31 22:15:21,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161022517] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:21,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:21,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:15:21,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042434273] [2024-10-31 22:15:21,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:21,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:21,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:21,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:21,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:21,098 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:21,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:21,154 INFO L93 Difference]: Finished difference Result 106 states and 136 transitions. [2024-10-31 22:15:21,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:15:21,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-10-31 22:15:21,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:21,155 INFO L225 Difference]: With dead ends: 106 [2024-10-31 22:15:21,155 INFO L226 Difference]: Without dead ends: 106 [2024-10-31 22:15:21,156 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:21,156 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:21,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 37 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:21,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-31 22:15:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2024-10-31 22:15:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.2875) internal successors, (103), 84 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:21,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2024-10-31 22:15:21,160 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 42 [2024-10-31 22:15:21,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:21,161 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2024-10-31 22:15:21,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2024-10-31 22:15:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 22:15:21,162 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:21,162 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:21,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-31 22:15:21,163 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:21,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:21,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2003144982, now seen corresponding path program 1 times [2024-10-31 22:15:21,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:21,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603610126] [2024-10-31 22:15:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:21,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-31 22:15:21,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:21,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603610126] [2024-10-31 22:15:21,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603610126] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:21,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959019779] [2024-10-31 22:15:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:21,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:21,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:21,380 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:21,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:15:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:21,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:15:21,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:21,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:21,840 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 22 treesize of output 18 [2024-10-31 22:15:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:22,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959019779] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:22,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:22,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 10] total 22 [2024-10-31 22:15:22,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507498378] [2024-10-31 22:15:22,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:22,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:15:22,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:22,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:15:22,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:15:22,034 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 23 states, 22 states have (on average 3.727272727272727) internal successors, (82), 23 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:23,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:23,157 INFO L93 Difference]: Finished difference Result 245 states and 379 transitions. [2024-10-31 22:15:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-31 22:15:23,157 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.727272727272727) internal successors, (82), 23 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-10-31 22:15:23,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:23,158 INFO L225 Difference]: With dead ends: 245 [2024-10-31 22:15:23,158 INFO L226 Difference]: Without dead ends: 245 [2024-10-31 22:15:23,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=823, Invalid=1727, Unknown=0, NotChecked=0, Total=2550 [2024-10-31 22:15:23,160 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 531 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:23,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 87 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-31 22:15:23,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-10-31 22:15:23,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 103. [2024-10-31 22:15:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.3265306122448979) internal successors, (130), 102 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:23,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2024-10-31 22:15:23,165 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 44 [2024-10-31 22:15:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:23,165 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2024-10-31 22:15:23,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.727272727272727) internal successors, (82), 23 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2024-10-31 22:15:23,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-31 22:15:23,166 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:23,166 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:23,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 22:15:23,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-31 22:15:23,367 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:23,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:23,368 INFO L85 PathProgramCache]: Analyzing trace with hash 617290424, now seen corresponding path program 2 times [2024-10-31 22:15:23,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:23,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297643454] [2024-10-31 22:15:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:23,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-31 22:15:23,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:23,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297643454] [2024-10-31 22:15:23,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297643454] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:23,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760065378] [2024-10-31 22:15:23,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:15:23,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:23,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:23,629 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:23,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:15:23,747 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:15:23,747 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:23,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:15:23,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-31 22:15:24,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:24,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-31 22:15:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-31 22:15:24,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760065378] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:24,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:24,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-10-31 22:15:24,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233019694] [2024-10-31 22:15:24,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:24,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:15:24,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:15:24,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:15:24,318 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand has 23 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:24,727 INFO L93 Difference]: Finished difference Result 167 states and 217 transitions. [2024-10-31 22:15:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:15:24,728 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-10-31 22:15:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:24,729 INFO L225 Difference]: With dead ends: 167 [2024-10-31 22:15:24,729 INFO L226 Difference]: Without dead ends: 167 [2024-10-31 22:15:24,730 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2024-10-31 22:15:24,730 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 378 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:24,731 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 305 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:15:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-10-31 22:15:24,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 105. [2024-10-31 22:15:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.33) internal successors, (133), 104 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:24,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2024-10-31 22:15:24,738 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 47 [2024-10-31 22:15:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:24,739 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2024-10-31 22:15:24,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:24,739 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2024-10-31 22:15:24,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 22:15:24,743 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:24,743 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:24,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-31 22:15:24,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:24,944 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:24,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:24,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1524593276, now seen corresponding path program 1 times [2024-10-31 22:15:24,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:24,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170304272] [2024-10-31 22:15:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:24,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-10-31 22:15:25,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:25,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170304272] [2024-10-31 22:15:25,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170304272] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:25,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:25,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:15:25,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136034316] [2024-10-31 22:15:25,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:25,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:25,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:25,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:25,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:25,029 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:25,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:25,059 INFO L93 Difference]: Finished difference Result 112 states and 140 transitions. [2024-10-31 22:15:25,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:15:25,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 49 [2024-10-31 22:15:25,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:25,061 INFO L225 Difference]: With dead ends: 112 [2024-10-31 22:15:25,061 INFO L226 Difference]: Without dead ends: 112 [2024-10-31 22:15:25,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:25,062 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:25,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 84 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:15:25,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-10-31 22:15:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2024-10-31 22:15:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.33) internal successors, (133), 104 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2024-10-31 22:15:25,066 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 49 [2024-10-31 22:15:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:25,066 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2024-10-31 22:15:25,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2024-10-31 22:15:25,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 22:15:25,068 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:25,068 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:25,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-31 22:15:25,068 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:25,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:25,069 INFO L85 PathProgramCache]: Analyzing trace with hash 510610673, now seen corresponding path program 3 times [2024-10-31 22:15:25,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:25,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692832748] [2024-10-31 22:15:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:25,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:25,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:25,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692832748] [2024-10-31 22:15:25,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692832748] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:25,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134945478] [2024-10-31 22:15:25,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:15:25,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:25,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:25,670 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:25,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-31 22:15:25,787 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:15:25,787 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:25,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 22:15:25,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:25,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-31 22:15:25,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:15:25,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-31 22:15:26,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:15:26,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2024-10-31 22:15:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-10-31 22:15:26,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:26,988 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2024-10-31 22:15:26,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 15 [2024-10-31 22:15:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-10-31 22:15:27,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134945478] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:27,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:27,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 30 [2024-10-31 22:15:27,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830139981] [2024-10-31 22:15:27,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:27,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-31 22:15:27,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:27,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-31 22:15:27,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2024-10-31 22:15:27,306 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:30,300 INFO L93 Difference]: Finished difference Result 202 states and 261 transitions. [2024-10-31 22:15:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-31 22:15:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 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 49 [2024-10-31 22:15:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:30,302 INFO L225 Difference]: With dead ends: 202 [2024-10-31 22:15:30,302 INFO L226 Difference]: Without dead ends: 202 [2024-10-31 22:15:30,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=818, Invalid=4152, Unknown=0, NotChecked=0, Total=4970 [2024-10-31 22:15:30,304 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 851 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 2119 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:30,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 403 Invalid, 2225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2119 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-10-31 22:15:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-10-31 22:15:30,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 139. [2024-10-31 22:15:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 135 states have (on average 1.385185185185185) internal successors, (187), 138 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 187 transitions. [2024-10-31 22:15:30,309 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 187 transitions. Word has length 49 [2024-10-31 22:15:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:30,309 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 187 transitions. [2024-10-31 22:15:30,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:30,310 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 187 transitions. [2024-10-31 22:15:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 22:15:30,310 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:30,311 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:30,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-31 22:15:30,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:30,515 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:30,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:30,515 INFO L85 PathProgramCache]: Analyzing trace with hash -101369970, now seen corresponding path program 1 times [2024-10-31 22:15:30,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:30,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992209040] [2024-10-31 22:15:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:30,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-31 22:15:30,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:30,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992209040] [2024-10-31 22:15:30,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992209040] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:30,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:30,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:15:30,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659095736] [2024-10-31 22:15:30,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:30,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:15:30,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:30,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:15:30,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:15:30,704 INFO L87 Difference]: Start difference. First operand 139 states and 187 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:30,742 INFO L93 Difference]: Finished difference Result 138 states and 186 transitions. [2024-10-31 22:15:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:15:30,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-10-31 22:15:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:30,743 INFO L225 Difference]: With dead ends: 138 [2024-10-31 22:15:30,743 INFO L226 Difference]: Without dead ends: 131 [2024-10-31 22:15:30,744 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:15:30,744 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:30,744 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 96 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:15:30,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-31 22:15:30,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2024-10-31 22:15:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 128 states have (on average 1.2734375) internal successors, (163), 130 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:30,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 163 transitions. [2024-10-31 22:15:30,748 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 163 transitions. Word has length 50 [2024-10-31 22:15:30,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:30,749 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 163 transitions. [2024-10-31 22:15:30,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:30,749 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 163 transitions. [2024-10-31 22:15:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 22:15:30,749 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:30,750 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:30,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-31 22:15:30,750 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:30,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:30,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1805865131, now seen corresponding path program 2 times [2024-10-31 22:15:30,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:30,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859632554] [2024-10-31 22:15:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:30,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-31 22:15:31,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:31,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859632554] [2024-10-31 22:15:31,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859632554] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:31,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551988233] [2024-10-31 22:15:31,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:15:31,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:31,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:31,041 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:31,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-31 22:15:31,157 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:15:31,157 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:31,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:15:31,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-31 22:15:31,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:31,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-31 22:15:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-31 22:15:31,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551988233] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:31,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:31,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2024-10-31 22:15:31,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727833846] [2024-10-31 22:15:31,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:31,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 22:15:31,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:31,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 22:15:31,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2024-10-31 22:15:31,623 INFO L87 Difference]: Start difference. First operand 131 states and 163 transitions. Second operand has 22 states, 21 states have (on average 3.619047619047619) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:31,942 INFO L93 Difference]: Finished difference Result 270 states and 354 transitions. [2024-10-31 22:15:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:15:31,942 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.619047619047619) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-10-31 22:15:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:31,943 INFO L225 Difference]: With dead ends: 270 [2024-10-31 22:15:31,943 INFO L226 Difference]: Without dead ends: 270 [2024-10-31 22:15:31,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2024-10-31 22:15:31,944 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 186 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:31,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 158 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:15:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2024-10-31 22:15:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 141. [2024-10-31 22:15:31,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 138 states have (on average 1.2826086956521738) internal successors, (177), 140 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 177 transitions. [2024-10-31 22:15:31,952 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 177 transitions. Word has length 50 [2024-10-31 22:15:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:31,952 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 177 transitions. [2024-10-31 22:15:31,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.619047619047619) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 177 transitions. [2024-10-31 22:15:31,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 22:15:31,953 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:31,953 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:31,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-31 22:15:32,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-31 22:15:32,157 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:32,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:32,158 INFO L85 PathProgramCache]: Analyzing trace with hash 777432299, now seen corresponding path program 1 times [2024-10-31 22:15:32,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:32,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029904802] [2024-10-31 22:15:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:32,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-10-31 22:15:32,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:32,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029904802] [2024-10-31 22:15:32,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029904802] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:32,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:32,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:15:32,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376564716] [2024-10-31 22:15:32,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:32,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:32,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:32,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:32,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:32,296 INFO L87 Difference]: Start difference. First operand 141 states and 177 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:32,335 INFO L93 Difference]: Finished difference Result 154 states and 191 transitions. [2024-10-31 22:15:32,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:15:32,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-10-31 22:15:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:32,337 INFO L225 Difference]: With dead ends: 154 [2024-10-31 22:15:32,337 INFO L226 Difference]: Without dead ends: 154 [2024-10-31 22:15:32,337 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:32,339 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:32,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:15:32,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-10-31 22:15:32,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2024-10-31 22:15:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 147 states have (on average 1.2585034013605443) internal successors, (185), 149 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:32,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 185 transitions. [2024-10-31 22:15:32,345 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 185 transitions. Word has length 51 [2024-10-31 22:15:32,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:32,346 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 185 transitions. [2024-10-31 22:15:32,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:32,346 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 185 transitions. [2024-10-31 22:15:32,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-31 22:15:32,347 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:32,347 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:32,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-10-31 22:15:32,347 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:32,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:32,348 INFO L85 PathProgramCache]: Analyzing trace with hash -269602738, now seen corresponding path program 3 times [2024-10-31 22:15:32,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:32,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118181637] [2024-10-31 22:15:32,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:32,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-31 22:15:33,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:33,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118181637] [2024-10-31 22:15:33,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118181637] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:33,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941268140] [2024-10-31 22:15:33,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:15:33,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:33,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:33,080 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:33,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-31 22:15:33,199 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:15:33,199 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:33,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-31 22:15:33,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:33,210 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 [2024-10-31 22:15:33,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-31 22:15:33,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:15:33,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2024-10-31 22:15:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-10-31 22:15:33,790 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:34,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2024-10-31 22:15:34,189 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-31 22:15:34,189 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 54 treesize of output 44 [2024-10-31 22:15:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-10-31 22:15:34,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941268140] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:34,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:34,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 35 [2024-10-31 22:15:34,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137956740] [2024-10-31 22:15:34,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:34,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-31 22:15:34,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:34,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-31 22:15:34,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2024-10-31 22:15:34,566 INFO L87 Difference]: Start difference. First operand 150 states and 185 transitions. Second operand has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:36,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:36,812 INFO L93 Difference]: Finished difference Result 333 states and 412 transitions. [2024-10-31 22:15:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-31 22:15:36,812 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-10-31 22:15:36,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:36,814 INFO L225 Difference]: With dead ends: 333 [2024-10-31 22:15:36,814 INFO L226 Difference]: Without dead ends: 322 [2024-10-31 22:15:36,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1072, Invalid=4040, Unknown=0, NotChecked=0, Total=5112 [2024-10-31 22:15:36,816 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 623 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:36,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 106 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-31 22:15:36,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2024-10-31 22:15:36,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 133. [2024-10-31 22:15:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 131 states have (on average 1.213740458015267) internal successors, (159), 132 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 159 transitions. [2024-10-31 22:15:36,831 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 159 transitions. Word has length 52 [2024-10-31 22:15:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:36,831 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 159 transitions. [2024-10-31 22:15:36,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 159 transitions. [2024-10-31 22:15:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-31 22:15:36,832 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:36,832 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:36,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-31 22:15:37,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-31 22:15:37,033 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:37,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:37,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2022004804, now seen corresponding path program 1 times [2024-10-31 22:15:37,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:37,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522275849] [2024-10-31 22:15:37,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:37,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-10-31 22:15:37,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:37,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522275849] [2024-10-31 22:15:37,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522275849] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:37,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580830307] [2024-10-31 22:15:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:37,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:37,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:37,237 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:37,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-31 22:15:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:37,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:15:37,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-10-31 22:15:37,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-10-31 22:15:37,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580830307] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:37,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:37,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-10-31 22:15:37,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635275454] [2024-10-31 22:15:37,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:37,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:15:37,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:37,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:15:37,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:15:37,498 INFO L87 Difference]: Start difference. First operand 133 states and 159 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:37,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:37,600 INFO L93 Difference]: Finished difference Result 132 states and 156 transitions. [2024-10-31 22:15:37,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:15:37,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 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 54 [2024-10-31 22:15:37,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:37,602 INFO L225 Difference]: With dead ends: 132 [2024-10-31 22:15:37,602 INFO L226 Difference]: Without dead ends: 115 [2024-10-31 22:15:37,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:15:37,603 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:37,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-31 22:15:37,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2024-10-31 22:15:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 114 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 136 transitions. [2024-10-31 22:15:37,607 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 136 transitions. Word has length 54 [2024-10-31 22:15:37,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:37,607 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 136 transitions. [2024-10-31 22:15:37,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 136 transitions. [2024-10-31 22:15:37,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-31 22:15:37,608 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:37,608 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:37,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-31 22:15:37,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-31 22:15:37,809 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:15:37,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:37,809 INFO L85 PathProgramCache]: Analyzing trace with hash 977789931, now seen corresponding path program 2 times [2024-10-31 22:15:37,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:37,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972467595] [2024-10-31 22:15:37,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:37,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-10-31 22:15:38,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:38,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972467595] [2024-10-31 22:15:38,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972467595] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:38,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716725870] [2024-10-31 22:15:38,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:15:38,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:38,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:38,027 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:38,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd5070a-443b-4585-8ad7-528fb881abe1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process