./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/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_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/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_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/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 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:15:09,675 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:15:09,756 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:15:09,768 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:15:09,768 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:15:09,793 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:15:09,794 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:15:09,795 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:15:09,795 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:15:09,798 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:15:09,798 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:15:09,799 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:15:09,800 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:15:09,801 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:15:09,805 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:15:09,805 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:15:09,806 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:15:09,806 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:15:09,806 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:15:09,807 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:15:09,807 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:15:09,808 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:15:09,808 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:15:09,808 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:15:09,809 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:15:09,809 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:15:09,809 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:15:09,810 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:15:09,810 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:15:09,810 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:15:09,811 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:15:09,813 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:15:09,814 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:15:09,814 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:15:09,814 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:15:09,815 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:15:09,815 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:15:09,815 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:15:09,815 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:15:09,816 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:15:09,816 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:15:09,816 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:15:09,817 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_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 [2024-10-31 22:15:10,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:15:10,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:15:10,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:15:10,279 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:15:10,280 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:15:10,281 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c Unable to find full path for "g++" [2024-10-31 22:15:12,483 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:15:12,699 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:15:12,700 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2024-10-31 22:15:12,709 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/data/38f01a397/4c7b1e27b6ed4918947c55e799668664/FLAG12070e02a [2024-10-31 22:15:12,730 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/data/38f01a397/4c7b1e27b6ed4918947c55e799668664 [2024-10-31 22:15:12,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:15:12,737 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:15:12,740 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:15:12,741 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:15:12,747 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:15:12,748 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:15:12" (1/1) ... [2024-10-31 22:15:12,749 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36862cb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:12, skipping insertion in model container [2024-10-31 22:15:12,749 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:15:12" (1/1) ... [2024-10-31 22:15:12,779 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:15:13,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:15:13,040 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:15:13,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:15:13,085 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:15:13,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:13 WrapperNode [2024-10-31 22:15:13,086 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:15:13,087 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:15:13,088 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:15:13,088 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:15:13,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:13" (1/1) ... [2024-10-31 22:15:13,105 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:13" (1/1) ... [2024-10-31 22:15:13,133 INFO L138 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 86 [2024-10-31 22:15:13,135 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:15:13,136 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:15:13,136 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:15:13,136 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:15:13,149 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:13" (1/1) ... [2024-10-31 22:15:13,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:13" (1/1) ... [2024-10-31 22:15:13,155 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:13" (1/1) ... [2024-10-31 22:15:13,180 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 2 writes are split as follows [1, 1]. [2024-10-31 22:15:13,180 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:13" (1/1) ... [2024-10-31 22:15:13,181 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:13" (1/1) ... [2024-10-31 22:15:13,188 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:13" (1/1) ... [2024-10-31 22:15:13,200 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:13" (1/1) ... [2024-10-31 22:15:13,201 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:13" (1/1) ... [2024-10-31 22:15:13,202 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:13" (1/1) ... [2024-10-31 22:15:13,208 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:15:13,209 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:15:13,210 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:15:13,210 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:15:13,211 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:13" (1/1) ... [2024-10-31 22:15:13,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:15:13,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:13,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:15:13,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:15:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:15:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:15:13,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:15:13,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:15:13,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:15:13,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:15:13,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:15:13,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:15:13,391 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:15:13,394 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:15:13,635 INFO L? ?]: Removed 45 outVars from TransFormulas that were not future-live. [2024-10-31 22:15:13,635 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:15:13,650 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:15:13,651 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:15:13,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:15:13 BoogieIcfgContainer [2024-10-31 22:15:13,652 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:15:13,656 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:15:13,656 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:15:13,660 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:15:13,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:15:12" (1/3) ... [2024-10-31 22:15:13,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5897a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:15:13, skipping insertion in model container [2024-10-31 22:15:13,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:13" (2/3) ... [2024-10-31 22:15:13,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5897a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:15:13, skipping insertion in model container [2024-10-31 22:15:13,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:15:13" (3/3) ... [2024-10-31 22:15:13,665 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2.c [2024-10-31 22:15:13,687 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:15:13,687 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2024-10-31 22:15:13,741 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:15:13,748 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;@19b00491, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:15:13,748 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-10-31 22:15:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:13,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-31 22:15:13,760 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:13,761 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:15:13,762 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:13,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash 28698921, now seen corresponding path program 1 times [2024-10-31 22:15:13,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:13,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37187724] [2024-10-31 22:15:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:13,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:14,164 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 22:15:14,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:14,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37187724] [2024-10-31 22:15:14,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37187724] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:14,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:14,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:15:14,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862831475] [2024-10-31 22:15:14,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:14,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:14,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:14,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:14,243 INFO L87 Difference]: Start difference. First operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:14,380 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2024-10-31 22:15:14,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:15:14,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-31 22:15:14,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:14,389 INFO L225 Difference]: With dead ends: 56 [2024-10-31 22:15:14,389 INFO L226 Difference]: Without dead ends: 54 [2024-10-31 22:15:14,391 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:15:14,395 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 33 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:14,396 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 82 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:14,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-31 22:15:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2024-10-31 22:15:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 38 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 22:15:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-10-31 22:15:14,433 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 5 [2024-10-31 22:15:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:14,434 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-10-31 22:15:14,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-10-31 22:15:14,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-31 22:15:14,435 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:14,435 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:14,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:15:14,436 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:14,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:14,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1809811544, now seen corresponding path program 1 times [2024-10-31 22:15:14,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:14,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928172444] [2024-10-31 22:15:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:14,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:14,659 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 22:15:14,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:14,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928172444] [2024-10-31 22:15:14,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928172444] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:14,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:14,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:15:14,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518998738] [2024-10-31 22:15:14,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:14,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:15:14,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:14,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:15:14,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:15:14,664 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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 22:15:14,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:14,762 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2024-10-31 22:15:14,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:15:14,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-31 22:15:14,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:14,767 INFO L225 Difference]: With dead ends: 50 [2024-10-31 22:15:14,767 INFO L226 Difference]: Without dead ends: 50 [2024-10-31 22:15:14,767 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:15:14,769 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:14,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 108 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:14,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-31 22:15:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2024-10-31 22:15:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-10-31 22:15:14,775 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 7 [2024-10-31 22:15:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:14,776 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-10-31 22:15:14,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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 22:15:14,776 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-10-31 22:15:14,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-31 22:15:14,777 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:14,777 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:14,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:15:14,778 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:14,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash -489510905, now seen corresponding path program 1 times [2024-10-31 22:15:14,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:14,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849130867] [2024-10-31 22:15:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:14,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:14,878 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 22:15:14,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:14,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849130867] [2024-10-31 22:15:14,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849130867] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:14,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:14,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:15:14,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763084011] [2024-10-31 22:15:14,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:14,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:15:14,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:14,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:15:14,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:15:14,885 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:14,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:14,926 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2024-10-31 22:15:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:15:14,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-31 22:15:14,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:14,928 INFO L225 Difference]: With dead ends: 49 [2024-10-31 22:15:14,928 INFO L226 Difference]: Without dead ends: 49 [2024-10-31 22:15:14,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:15:14,930 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:14,932 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 143 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:15:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-31 22:15:14,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2024-10-31 22:15:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:15:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2024-10-31 22:15:14,943 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 11 [2024-10-31 22:15:14,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:14,943 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2024-10-31 22:15:14,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2024-10-31 22:15:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-31 22:15:14,944 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:14,944 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:14,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:15:14,945 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:14,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:14,946 INFO L85 PathProgramCache]: Analyzing trace with hash -489508983, now seen corresponding path program 1 times [2024-10-31 22:15:14,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:14,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677717731] [2024-10-31 22:15:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:14,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:15,168 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 22:15:15,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:15,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677717731] [2024-10-31 22:15:15,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677717731] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:15,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:15,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:15:15,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215121904] [2024-10-31 22:15:15,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:15,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:15,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:15,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:15,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:15,172 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:15,226 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2024-10-31 22:15:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:15:15,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-31 22:15:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:15,228 INFO L225 Difference]: With dead ends: 43 [2024-10-31 22:15:15,228 INFO L226 Difference]: Without dead ends: 43 [2024-10-31 22:15:15,228 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 22:15:15,230 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:15,231 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 30 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:15:15,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-31 22:15:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-10-31 22:15:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:15:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-10-31 22:15:15,236 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2024-10-31 22:15:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:15,236 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-10-31 22:15:15,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-10-31 22:15:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-31 22:15:15,237 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:15,238 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:15,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:15:15,238 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:15,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:15,239 INFO L85 PathProgramCache]: Analyzing trace with hash -489508982, now seen corresponding path program 1 times [2024-10-31 22:15:15,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:15,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440918418] [2024-10-31 22:15:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:15,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:15,482 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 22:15:15,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:15,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440918418] [2024-10-31 22:15:15,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440918418] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:15,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:15,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:15:15,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699079232] [2024-10-31 22:15:15,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:15,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:15:15,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:15,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:15:15,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:15:15,487 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:15,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:15,627 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2024-10-31 22:15:15,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:15:15,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-31 22:15:15,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:15,629 INFO L225 Difference]: With dead ends: 50 [2024-10-31 22:15:15,629 INFO L226 Difference]: Without dead ends: 50 [2024-10-31 22:15:15,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:15:15,630 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:15,631 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 68 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-31 22:15:15,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2024-10-31 22:15:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 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 22:15:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2024-10-31 22:15:15,643 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 11 [2024-10-31 22:15:15,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:15,643 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2024-10-31 22:15:15,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:15,644 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2024-10-31 22:15:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 22:15:15,645 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:15,645 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:15,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:15:15,646 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:15,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839934, now seen corresponding path program 1 times [2024-10-31 22:15:15,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:15,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891393483] [2024-10-31 22:15:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:15,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:15,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:15,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891393483] [2024-10-31 22:15:15,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891393483] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:15,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:15,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:15:15,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721497669] [2024-10-31 22:15:15,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:15,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:15,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:15,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:15,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:15,788 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 22:15:15,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:15,850 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2024-10-31 22:15:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:15:15,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-31 22:15:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:15,853 INFO L225 Difference]: With dead ends: 47 [2024-10-31 22:15:15,854 INFO L226 Difference]: Without dead ends: 47 [2024-10-31 22:15:15,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:15:15,855 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:15,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 35 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:15:15,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-31 22:15:15,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-10-31 22:15:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-10-31 22:15:15,866 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 16 [2024-10-31 22:15:15,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:15,867 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-10-31 22:15:15,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 22:15:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-10-31 22:15:15,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 22:15:15,868 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:15,868 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:15,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:15:15,868 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:15,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:15,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839933, now seen corresponding path program 1 times [2024-10-31 22:15:15,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:15,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062661530] [2024-10-31 22:15:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:15,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:16,111 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 22:15:16,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:16,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062661530] [2024-10-31 22:15:16,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062661530] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:16,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219837354] [2024-10-31 22:15:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:16,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:16,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:16,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:16,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:15:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:16,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:15:16,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:16,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:15:16,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:15:16,451 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:15:16,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:15:16,491 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 22:15:16,491 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:16,783 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 52 treesize of output 48 [2024-10-31 22:15:16,815 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:15:16,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2024-10-31 22:15:16,958 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 22:15:16,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219837354] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:16,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:16,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2024-10-31 22:15:16,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929888331] [2024-10-31 22:15:16,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:16,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:15:16,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:16,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:15:16,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:15:16,962 INFO L87 Difference]: Start difference. First operand 47 states and 52 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 22:15:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:17,433 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2024-10-31 22:15:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 22:15:17,434 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 16 [2024-10-31 22:15:17,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:17,436 INFO L225 Difference]: With dead ends: 119 [2024-10-31 22:15:17,436 INFO L226 Difference]: Without dead ends: 119 [2024-10-31 22:15:17,437 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:15:17,437 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 268 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:17,438 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 82 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:15:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-10-31 22:15:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 56. [2024-10-31 22:15:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2024-10-31 22:15:17,444 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 16 [2024-10-31 22:15:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:17,444 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2024-10-31 22:15:17,444 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 22:15:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2024-10-31 22:15:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-31 22:15:17,447 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:17,447 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:17,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:15:17,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:17,649 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:17,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash -411430410, now seen corresponding path program 1 times [2024-10-31 22:15:17,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:17,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658711642] [2024-10-31 22:15:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:17,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:17,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658711642] [2024-10-31 22:15:17,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658711642] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:17,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:17,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:15:17,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683609969] [2024-10-31 22:15:17,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:17,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:15:17,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:15:17,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:15:17,742 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 22:15:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:17,771 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2024-10-31 22:15:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:15:17,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2024-10-31 22:15:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:17,772 INFO L225 Difference]: With dead ends: 55 [2024-10-31 22:15:17,775 INFO L226 Difference]: Without dead ends: 55 [2024-10-31 22:15:17,775 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 22:15:17,776 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:17,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 38 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:15:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-31 22:15:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-10-31 22:15:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.3125) internal successors, (63), 54 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 22:15:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2024-10-31 22:15:17,785 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 17 [2024-10-31 22:15:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:17,786 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2024-10-31 22:15:17,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 22:15:17,788 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2024-10-31 22:15:17,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-31 22:15:17,788 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:17,789 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:17,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:15:17,789 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:17,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:17,790 INFO L85 PathProgramCache]: Analyzing trace with hash -411430409, now seen corresponding path program 1 times [2024-10-31 22:15:17,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:17,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216581297] [2024-10-31 22:15:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:17,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:18,012 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 22:15:18,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:18,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216581297] [2024-10-31 22:15:18,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216581297] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:18,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689522966] [2024-10-31 22:15:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:18,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:18,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:18,017 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:18,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:15:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:18,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:15:18,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:18,147 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 22:15:18,172 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 22:15:18,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:18,299 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 22:15:18,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689522966] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:18,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:18,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-31 22:15:18,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150412907] [2024-10-31 22:15:18,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:18,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:15:18,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:18,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:15:18,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:15:18,302 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 22:15:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:18,614 INFO L93 Difference]: Finished difference Result 146 states and 172 transitions. [2024-10-31 22:15:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:15:18,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 17 [2024-10-31 22:15:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:18,615 INFO L225 Difference]: With dead ends: 146 [2024-10-31 22:15:18,616 INFO L226 Difference]: Without dead ends: 146 [2024-10-31 22:15:18,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:15:18,617 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 178 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:18,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 140 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:15:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-10-31 22:15:18,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2024-10-31 22:15:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 97 states have (on average 1.3711340206185567) internal successors, (133), 103 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 22:15:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2024-10-31 22:15:18,625 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 17 [2024-10-31 22:15:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:18,626 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2024-10-31 22:15:18,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 22:15:18,626 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2024-10-31 22:15:18,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-31 22:15:18,626 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:18,627 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:18,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:15:18,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:18,830 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:18,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:18,831 INFO L85 PathProgramCache]: Analyzing trace with hash 130511665, now seen corresponding path program 1 times [2024-10-31 22:15:18,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:18,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603417648] [2024-10-31 22:15:18,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:18,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:18,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:18,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603417648] [2024-10-31 22:15:18,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603417648] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:18,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:18,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:15:18,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831005237] [2024-10-31 22:15:18,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:18,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:18,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:18,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:18,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:18,916 INFO L87 Difference]: Start difference. First operand 104 states and 133 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 22:15:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:18,959 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2024-10-31 22:15:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:15:18,960 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 18 [2024-10-31 22:15:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:18,960 INFO L225 Difference]: With dead ends: 103 [2024-10-31 22:15:18,960 INFO L226 Difference]: Without dead ends: 103 [2024-10-31 22:15:18,961 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:15:18,961 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:18,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 52 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:15:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-31 22:15:18,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-10-31 22:15:18,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.3402061855670102) 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 22:15:18,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2024-10-31 22:15:18,968 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 18 [2024-10-31 22:15:18,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:18,968 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2024-10-31 22:15:18,968 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 22:15:18,968 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2024-10-31 22:15:18,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-31 22:15:18,969 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:18,969 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:18,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:15:18,970 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:18,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:18,970 INFO L85 PathProgramCache]: Analyzing trace with hash 130511666, now seen corresponding path program 1 times [2024-10-31 22:15:18,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:18,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927073142] [2024-10-31 22:15:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:18,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:19,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:19,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927073142] [2024-10-31 22:15:19,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927073142] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:19,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368657187] [2024-10-31 22:15:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:19,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:19,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:19,088 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:19,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:15:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:19,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:15:19,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:19,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:19,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368657187] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:19,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:19,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-10-31 22:15:19,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623464233] [2024-10-31 22:15:19,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:19,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:15:19,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:19,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:15:19,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:15:19,291 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:19,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:19,391 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2024-10-31 22:15:19,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:15:19,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-31 22:15:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:19,392 INFO L225 Difference]: With dead ends: 110 [2024-10-31 22:15:19,392 INFO L226 Difference]: Without dead ends: 110 [2024-10-31 22:15:19,393 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:15:19,393 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:19,394 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 74 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:19,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-10-31 22:15:19,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2024-10-31 22:15:19,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.2989690721649485) internal successors, (126), 102 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:19,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2024-10-31 22:15:19,400 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 18 [2024-10-31 22:15:19,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:19,401 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2024-10-31 22:15:19,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:19,401 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2024-10-31 22:15:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-31 22:15:19,402 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:19,402 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:19,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:15:19,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 22:15:19,605 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:19,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:19,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1752050598, now seen corresponding path program 1 times [2024-10-31 22:15:19,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:19,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467809066] [2024-10-31 22:15:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:19,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:19,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:19,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467809066] [2024-10-31 22:15:19,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467809066] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:19,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730204734] [2024-10-31 22:15:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:19,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:19,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:19,803 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:19,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:15:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:19,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:15:19,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:19,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:20,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730204734] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:20,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:20,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-10-31 22:15:20,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578368325] [2024-10-31 22:15:20,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:20,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:15:20,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:20,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:15:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:15:20,060 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 22:15:20,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:20,220 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2024-10-31 22:15:20,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:15:20,220 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 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 22:15:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:20,221 INFO L225 Difference]: With dead ends: 102 [2024-10-31 22:15:20,221 INFO L226 Difference]: Without dead ends: 102 [2024-10-31 22:15:20,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:15:20,222 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:20,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 123 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-31 22:15:20,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2024-10-31 22:15:20,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 100 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 22:15:20,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2024-10-31 22:15:20,232 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 21 [2024-10-31 22:15:20,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:20,232 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2024-10-31 22:15:20,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 22:15:20,233 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2024-10-31 22:15:20,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-31 22:15:20,233 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:20,234 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:20,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:15:20,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 22:15:20,439 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:20,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:20,439 INFO L85 PathProgramCache]: Analyzing trace with hash -93493367, now seen corresponding path program 1 times [2024-10-31 22:15:20,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:20,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99758035] [2024-10-31 22:15:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:20,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:20,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:20,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99758035] [2024-10-31 22:15:20,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99758035] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751278882] [2024-10-31 22:15:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:20,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:20,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:20,632 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:20,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:15:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:20,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:15:20,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:20,746 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 22:15:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:20,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:20,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751278882] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:20,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:15:20,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 10 [2024-10-31 22:15:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099265133] [2024-10-31 22:15:20,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:20,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:15:20,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:15:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:15:20,942 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:21,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:21,013 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2024-10-31 22:15:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:15:21,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-10-31 22:15:21,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:21,015 INFO L225 Difference]: With dead ends: 105 [2024-10-31 22:15:21,015 INFO L226 Difference]: Without dead ends: 105 [2024-10-31 22:15:21,016 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:15:21,016 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:21,017 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 60 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:21,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-31 22:15:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2024-10-31 22:15:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.2653061224489797) internal successors, (124), 103 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2024-10-31 22:15:21,021 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 23 [2024-10-31 22:15:21,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:21,021 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2024-10-31 22:15:21,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:21,022 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2024-10-31 22:15:21,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-31 22:15:21,023 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:21,023 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:21,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:15:21,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-31 22:15:21,227 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:21,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:21,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1409452358, now seen corresponding path program 1 times [2024-10-31 22:15:21,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:21,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879935808] [2024-10-31 22:15:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:21,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:21,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:21,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879935808] [2024-10-31 22:15:21,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879935808] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:21,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517333896] [2024-10-31 22:15:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:21,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:21,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:21,403 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:21,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:15:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:21,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:15:21,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:21,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:21,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517333896] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:21,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:21,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-10-31 22:15:21,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912484371] [2024-10-31 22:15:21,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:21,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:15:21,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:21,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:15:21,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:15:21,662 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:15:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:21,766 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2024-10-31 22:15:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:15:21,766 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-31 22:15:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:21,767 INFO L225 Difference]: With dead ends: 104 [2024-10-31 22:15:21,767 INFO L226 Difference]: Without dead ends: 104 [2024-10-31 22:15:21,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:15:21,768 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 81 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:21,768 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 85 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-10-31 22:15:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2024-10-31 22:15:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.2584269662921348) internal successors, (112), 94 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 22:15:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2024-10-31 22:15:21,773 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 27 [2024-10-31 22:15:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:21,773 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2024-10-31 22:15:21,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:15:21,774 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2024-10-31 22:15:21,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-31 22:15:21,774 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:21,774 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:21,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:15:21,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-31 22:15:21,975 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:21,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:21,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1360755252, now seen corresponding path program 1 times [2024-10-31 22:15:21,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:21,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891456566] [2024-10-31 22:15:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:21,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:22,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:22,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891456566] [2024-10-31 22:15:22,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891456566] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:22,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301845765] [2024-10-31 22:15:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:22,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:22,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:22,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:22,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:15:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:22,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:15:22,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:22,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:22,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301845765] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:22,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:22,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-31 22:15:22,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536715251] [2024-10-31 22:15:22,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:22,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:15:22,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:22,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:15:22,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:15:22,452 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:15:22,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:22,598 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2024-10-31 22:15:22,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:15:22,599 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-31 22:15:22,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:22,599 INFO L225 Difference]: With dead ends: 95 [2024-10-31 22:15:22,600 INFO L226 Difference]: Without dead ends: 95 [2024-10-31 22:15:22,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:15:22,602 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:22,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 116 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:22,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-31 22:15:22,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2024-10-31 22:15:22,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 93 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 22:15:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2024-10-31 22:15:22,607 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 27 [2024-10-31 22:15:22,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:22,607 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2024-10-31 22:15:22,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:15:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2024-10-31 22:15:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-31 22:15:22,610 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:22,610 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:22,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-31 22:15:22,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-31 22:15:22,811 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:22,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:22,812 INFO L85 PathProgramCache]: Analyzing trace with hash -144329733, now seen corresponding path program 1 times [2024-10-31 22:15:22,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:22,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993741998] [2024-10-31 22:15:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:22,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:15:23,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:23,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993741998] [2024-10-31 22:15:23,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993741998] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:23,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728895751] [2024-10-31 22:15:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:23,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:23,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:23,204 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:23,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:15:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:23,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-31 22:15:23,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:23,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:15:23,346 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 22:15:23,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:15:23,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-31 22:15:23,389 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:15:23,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:15:23,536 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 22:15:23,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-31 22:15:23,554 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:15:23,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:15:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:15:23,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:24,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:15:24,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-31 22:15:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:15:24,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728895751] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:24,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:24,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 17 [2024-10-31 22:15:24,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372146818] [2024-10-31 22:15:24,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:24,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 22:15:24,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:24,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 22:15:24,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-10-31 22:15:24,279 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 22:15:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:24,896 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2024-10-31 22:15:24,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:15:24,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 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 31 [2024-10-31 22:15:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:24,897 INFO L225 Difference]: With dead ends: 119 [2024-10-31 22:15:24,897 INFO L226 Difference]: Without dead ends: 119 [2024-10-31 22:15:24,898 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2024-10-31 22:15:24,898 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 117 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:24,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 187 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 22:15:24,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-10-31 22:15:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2024-10-31 22:15:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 107 states have (on average 1.233644859813084) internal successors, (132), 112 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 132 transitions. [2024-10-31 22:15:24,902 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 132 transitions. Word has length 31 [2024-10-31 22:15:24,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:24,903 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 132 transitions. [2024-10-31 22:15:24,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 22:15:24,903 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 132 transitions. [2024-10-31 22:15:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-31 22:15:24,904 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:24,904 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:24,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 22:15:25,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-31 22:15:25,109 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:25,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:25,110 INFO L85 PathProgramCache]: Analyzing trace with hash -195422278, now seen corresponding path program 1 times [2024-10-31 22:15:25,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:25,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731519971] [2024-10-31 22:15:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:25,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:15:25,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:25,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731519971] [2024-10-31 22:15:25,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731519971] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:25,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381983099] [2024-10-31 22:15:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:25,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:25,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:25,340 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:25,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:15:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:25,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 22:15:25,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:15:25,527 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:15:25,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381983099] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:25,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:25,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-10-31 22:15:25,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732018944] [2024-10-31 22:15:25,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:25,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:15:25,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:25,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:15:25,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:15:25,608 INFO L87 Difference]: Start difference. First operand 113 states and 132 transitions. Second operand has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:26,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:26,137 INFO L93 Difference]: Finished difference Result 156 states and 173 transitions. [2024-10-31 22:15:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-31 22:15:26,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-31 22:15:26,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:26,138 INFO L225 Difference]: With dead ends: 156 [2024-10-31 22:15:26,138 INFO L226 Difference]: Without dead ends: 156 [2024-10-31 22:15:26,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=614, Unknown=0, NotChecked=0, Total=870 [2024-10-31 22:15:26,139 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 173 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:26,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 157 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:15:26,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-10-31 22:15:26,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 135. [2024-10-31 22:15:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.2230769230769232) internal successors, (159), 134 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 22:15:26,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2024-10-31 22:15:26,144 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 37 [2024-10-31 22:15:26,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:26,144 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2024-10-31 22:15:26,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:26,145 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2024-10-31 22:15:26,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 22:15:26,145 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:26,146 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:26,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:15:26,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:26,346 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:26,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:26,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1675444341, now seen corresponding path program 1 times [2024-10-31 22:15:26,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:26,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808541463] [2024-10-31 22:15:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:26,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:26,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:26,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808541463] [2024-10-31 22:15:26,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808541463] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:26,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106383465] [2024-10-31 22:15:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:26,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:26,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:26,798 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:26,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:15:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:26,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-31 22:15:26,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:27,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:15:27,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:15:27,169 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:15:27,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:15:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:15:27,274 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:27,513 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 52 treesize of output 48 [2024-10-31 22:15:27,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:15:27,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2024-10-31 22:15:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:15:27,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106383465] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:27,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:27,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-10-31 22:15:27,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736359273] [2024-10-31 22:15:27,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:27,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 22:15:27,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:27,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 22:15:27,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-10-31 22:15:27,773 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 22:15:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:28,229 INFO L93 Difference]: Finished difference Result 210 states and 255 transitions. [2024-10-31 22:15:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 22:15:28,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 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 22:15:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:28,230 INFO L225 Difference]: With dead ends: 210 [2024-10-31 22:15:28,231 INFO L226 Difference]: Without dead ends: 210 [2024-10-31 22:15:28,231 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2024-10-31 22:15:28,232 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 130 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:28,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 185 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:15:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-10-31 22:15:28,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2024-10-31 22:15:28,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.2364864864864864) internal successors, (183), 152 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 183 transitions. [2024-10-31 22:15:28,238 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 183 transitions. Word has length 41 [2024-10-31 22:15:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:28,239 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 183 transitions. [2024-10-31 22:15:28,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 22:15:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 183 transitions. [2024-10-31 22:15:28,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-31 22:15:28,240 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:28,240 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:28,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 22:15:28,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:28,441 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:28,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:28,441 INFO L85 PathProgramCache]: Analyzing trace with hash -399167057, now seen corresponding path program 1 times [2024-10-31 22:15:28,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:28,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465768562] [2024-10-31 22:15:28,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:28,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:15:28,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:28,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465768562] [2024-10-31 22:15:28,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465768562] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:28,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317932655] [2024-10-31 22:15:28,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:28,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:28,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:28,813 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:28,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:15:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:28,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-31 22:15:29,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:29,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:15:29,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:15:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:15:29,341 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:29,418 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 14 treesize of output 12 [2024-10-31 22:15:29,421 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 18 treesize of output 16 [2024-10-31 22:15:29,448 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 14 treesize of output 12 [2024-10-31 22:15:29,452 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 18 treesize of output 16 [2024-10-31 22:15:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:15:29,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317932655] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:29,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:29,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 15] total 22 [2024-10-31 22:15:29,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709877597] [2024-10-31 22:15:29,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:29,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 22:15:29,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:29,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 22:15:29,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2024-10-31 22:15:29,497 INFO L87 Difference]: Start difference. First operand 153 states and 183 transitions. Second operand has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 22:15:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:30,614 INFO L93 Difference]: Finished difference Result 194 states and 222 transitions. [2024-10-31 22:15:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-31 22:15:30,614 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 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 22:15:30,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:30,615 INFO L225 Difference]: With dead ends: 194 [2024-10-31 22:15:30,615 INFO L226 Difference]: Without dead ends: 194 [2024-10-31 22:15:30,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=307, Invalid=2773, Unknown=0, NotChecked=0, Total=3080 [2024-10-31 22:15:30,617 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 206 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:30,618 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 288 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 22:15:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-10-31 22:15:30,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 175. [2024-10-31 22:15:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.2176470588235293) internal successors, (207), 174 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 22:15:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 207 transitions. [2024-10-31 22:15:30,626 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 207 transitions. Word has length 42 [2024-10-31 22:15:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:30,626 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 207 transitions. [2024-10-31 22:15:30,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 22:15:30,627 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 207 transitions. [2024-10-31 22:15:30,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-31 22:15:30,631 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:30,631 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:30,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-31 22:15:30,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:30,832 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:30,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:30,832 INFO L85 PathProgramCache]: Analyzing trace with hash 183114832, now seen corresponding path program 1 times [2024-10-31 22:15:30,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:30,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214104178] [2024-10-31 22:15:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:30,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:15:31,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:31,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214104178] [2024-10-31 22:15:31,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214104178] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:31,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656660480] [2024-10-31 22:15:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:31,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:31,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:31,015 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:31,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-31 22:15:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:31,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:15:31,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:15:31,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:15:31,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656660480] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:31,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:31,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-10-31 22:15:31,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541837242] [2024-10-31 22:15:31,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:31,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:15:31,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:31,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:15:31,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:15:31,361 INFO L87 Difference]: Start difference. First operand 175 states and 207 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 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 22:15:31,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:31,548 INFO L93 Difference]: Finished difference Result 185 states and 215 transitions. [2024-10-31 22:15:31,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:15:31,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 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 46 [2024-10-31 22:15:31,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:31,550 INFO L225 Difference]: With dead ends: 185 [2024-10-31 22:15:31,550 INFO L226 Difference]: Without dead ends: 185 [2024-10-31 22:15:31,550 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:15:31,551 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 122 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:31,551 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 187 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-10-31 22:15:31,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 167. [2024-10-31 22:15:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.2037037037037037) internal successors, (195), 166 states have internal predecessors, (195), 0 states have call successors, (0), 0 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 22:15:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 195 transitions. [2024-10-31 22:15:31,556 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 195 transitions. Word has length 46 [2024-10-31 22:15:31,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:31,556 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 195 transitions. [2024-10-31 22:15:31,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 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 22:15:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 195 transitions. [2024-10-31 22:15:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-31 22:15:31,557 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:31,557 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2024-10-31 22:15:31,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-31 22:15:31,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-10-31 22:15:31,758 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:31,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:31,758 INFO L85 PathProgramCache]: Analyzing trace with hash 457132991, now seen corresponding path program 2 times [2024-10-31 22:15:31,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:31,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78108685] [2024-10-31 22:15:31,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:31,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:15:31,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:31,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78108685] [2024-10-31 22:15:31,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78108685] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:31,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395595827] [2024-10-31 22:15:31,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:15:31,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:31,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:31,909 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:31,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-31 22:15:32,050 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:15:32,050 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:32,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:15:32,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:15:32,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:15:32,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395595827] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:32,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:32,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-31 22:15:32,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039411230] [2024-10-31 22:15:32,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:32,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:15:32,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:32,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:15:32,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:15:32,244 INFO L87 Difference]: Start difference. First operand 167 states and 195 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 22:15:32,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:32,456 INFO L93 Difference]: Finished difference Result 167 states and 193 transitions. [2024-10-31 22:15:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:15:32,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 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 22:15:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:32,458 INFO L225 Difference]: With dead ends: 167 [2024-10-31 22:15:32,458 INFO L226 Difference]: Without dead ends: 167 [2024-10-31 22:15:32,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:15:32,459 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 53 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:32,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 206 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:15:32,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-10-31 22:15:32,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 158. [2024-10-31 22:15:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.1830065359477124) internal successors, (181), 157 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 22:15:32,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 181 transitions. [2024-10-31 22:15:32,464 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 181 transitions. Word has length 47 [2024-10-31 22:15:32,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:32,464 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 181 transitions. [2024-10-31 22:15:32,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 22:15:32,465 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 181 transitions. [2024-10-31 22:15:32,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-31 22:15:32,465 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:32,465 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2024-10-31 22:15:32,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-31 22:15:32,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:32,666 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:32,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:32,667 INFO L85 PathProgramCache]: Analyzing trace with hash -269976254, now seen corresponding path program 3 times [2024-10-31 22:15:32,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:32,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269858492] [2024-10-31 22:15:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:32,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:15:33,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:33,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269858492] [2024-10-31 22:15:33,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269858492] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:33,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126819789] [2024-10-31 22:15:33,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:15:33,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:33,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:33,017 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:33,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-31 22:15:33,151 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 22:15:33,152 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:33,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-31 22:15:33,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 22:15:33,387 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:33,779 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 22:15:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 22:15:33,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126819789] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:33,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:33,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2024-10-31 22:15:33,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987433564] [2024-10-31 22:15:33,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:33,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-31 22:15:33,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:33,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-31 22:15:33,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2024-10-31 22:15:33,822 INFO L87 Difference]: Start difference. First operand 158 states and 181 transitions. Second operand has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:34,733 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2024-10-31 22:15:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-31 22:15:34,734 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-10-31 22:15:34,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:34,735 INFO L225 Difference]: With dead ends: 178 [2024-10-31 22:15:34,735 INFO L226 Difference]: Without dead ends: 178 [2024-10-31 22:15:34,736 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2024-10-31 22:15:34,737 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 89 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:34,737 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 274 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 22:15:34,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-10-31 22:15:34,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 154. [2024-10-31 22:15:34,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 150 states have (on average 1.16) internal successors, (174), 153 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 22:15:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 174 transitions. [2024-10-31 22:15:34,741 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 174 transitions. Word has length 52 [2024-10-31 22:15:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:34,741 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 174 transitions. [2024-10-31 22:15:34,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 174 transitions. [2024-10-31 22:15:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-31 22:15:34,742 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:34,742 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2024-10-31 22:15:34,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-31 22:15:34,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:34,943 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:34,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:34,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1696845129, now seen corresponding path program 1 times [2024-10-31 22:15:34,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:34,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700013461] [2024-10-31 22:15:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:34,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 48 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 22:15:35,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:35,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700013461] [2024-10-31 22:15:35,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700013461] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:35,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762271101] [2024-10-31 22:15:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:35,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:35,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:35,230 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:35,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-31 22:15:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:35,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:15:35,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 62 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 22:15:35,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 62 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 22:15:35,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762271101] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:35,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:35,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-10-31 22:15:35,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868458900] [2024-10-31 22:15:35,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:35,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:15:35,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:35,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:15:35,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:15:35,657 INFO L87 Difference]: Start difference. First operand 154 states and 174 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:35,831 INFO L93 Difference]: Finished difference Result 179 states and 198 transitions. [2024-10-31 22:15:35,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:15:35,831 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-10-31 22:15:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:35,832 INFO L225 Difference]: With dead ends: 179 [2024-10-31 22:15:35,833 INFO L226 Difference]: Without dead ends: 179 [2024-10-31 22:15:35,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:15:35,834 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 57 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:35,834 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 201 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:15:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-10-31 22:15:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2024-10-31 22:15:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 159 states have (on average 1.1446540880503144) internal successors, (182), 162 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 22:15:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 182 transitions. [2024-10-31 22:15:35,838 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 182 transitions. Word has length 67 [2024-10-31 22:15:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:35,838 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 182 transitions. [2024-10-31 22:15:35,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 182 transitions. [2024-10-31 22:15:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-31 22:15:35,839 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:35,839 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2024-10-31 22:15:35,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-31 22:15:36,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:36,043 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:36,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2103699286, now seen corresponding path program 2 times [2024-10-31 22:15:36,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:36,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617441320] [2024-10-31 22:15:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:36,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:15:36,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:36,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617441320] [2024-10-31 22:15:36,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617441320] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:36,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157908274] [2024-10-31 22:15:36,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:15:36,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:36,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:36,421 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:36,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-31 22:15:36,552 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:15:36,552 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:36,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 22:15:36,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:36,661 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 10 treesize of output 9 [2024-10-31 22:15:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-10-31 22:15:36,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-10-31 22:15:37,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157908274] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:37,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:37,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 16 [2024-10-31 22:15:37,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641058577] [2024-10-31 22:15:37,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:37,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:15:37,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:37,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:15:37,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:15:37,305 INFO L87 Difference]: Start difference. First operand 163 states and 182 transitions. Second operand has 17 states, 16 states have (on average 7.75) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:38,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:38,266 INFO L93 Difference]: Finished difference Result 169 states and 185 transitions. [2024-10-31 22:15:38,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-31 22:15:38,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 7.75) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-10-31 22:15:38,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:38,269 INFO L225 Difference]: With dead ends: 169 [2024-10-31 22:15:38,269 INFO L226 Difference]: Without dead ends: 169 [2024-10-31 22:15:38,270 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2024-10-31 22:15:38,271 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 128 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:38,271 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 289 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:15:38,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-10-31 22:15:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 162. [2024-10-31 22:15:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 159 states have (on average 1.1132075471698113) internal successors, (177), 161 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 22:15:38,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 177 transitions. [2024-10-31 22:15:38,280 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 177 transitions. Word has length 71 [2024-10-31 22:15:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:38,280 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 177 transitions. [2024-10-31 22:15:38,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 7.75) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 177 transitions. [2024-10-31 22:15:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-31 22:15:38,281 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:38,281 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2024-10-31 22:15:38,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-31 22:15:38,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-31 22:15:38,482 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:38,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:38,483 INFO L85 PathProgramCache]: Analyzing trace with hash -809246151, now seen corresponding path program 2 times [2024-10-31 22:15:38,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:38,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235275784] [2024-10-31 22:15:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:38,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 33 proven. 92 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 22:15:39,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:39,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235275784] [2024-10-31 22:15:39,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235275784] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:39,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530821313] [2024-10-31 22:15:39,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:15:39,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:39,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:39,122 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:39,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-31 22:15:39,316 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:15:39,317 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:39,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 22:15:39,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:39,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:15:39,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:15:39,668 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:15:39,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:15:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:15:39,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:40,101 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 52 treesize of output 48 [2024-10-31 22:15:40,121 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:15:40,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2024-10-31 22:15:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:15:40,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530821313] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:40,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:40,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-10-31 22:15:40,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721224648] [2024-10-31 22:15:40,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:40,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 22:15:40,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:40,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 22:15:40,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2024-10-31 22:15:40,447 INFO L87 Difference]: Start difference. First operand 162 states and 177 transitions. Second operand has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:40,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:40,957 INFO L93 Difference]: Finished difference Result 228 states and 252 transitions. [2024-10-31 22:15:40,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-31 22:15:40,958 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2024-10-31 22:15:40,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:40,959 INFO L225 Difference]: With dead ends: 228 [2024-10-31 22:15:40,959 INFO L226 Difference]: Without dead ends: 228 [2024-10-31 22:15:40,959 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2024-10-31 22:15:40,960 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 170 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:40,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 334 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:15:40,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-10-31 22:15:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 177. [2024-10-31 22:15:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 174 states have (on average 1.1206896551724137) internal successors, (195), 176 states have internal predecessors, (195), 0 states have call successors, (0), 0 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 22:15:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 195 transitions. [2024-10-31 22:15:40,967 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 195 transitions. Word has length 75 [2024-10-31 22:15:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:40,968 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 195 transitions. [2024-10-31 22:15:40,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 195 transitions. [2024-10-31 22:15:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-10-31 22:15:40,969 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:40,969 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2024-10-31 22:15:40,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-31 22:15:41,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b891ba5-8acf-44f1-80f9-3d487f67fdf8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:41,173 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-10-31 22:15:41,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:41,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1737117148, now seen corresponding path program 3 times [2024-10-31 22:15:41,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:41,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141014064] [2024-10-31 22:15:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:41,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat