./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1 --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 d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 14:08:34,561 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 14:08:34,626 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 14:08:34,631 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 14:08:34,631 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 14:08:34,656 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 14:08:34,656 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 14:08:34,657 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 14:08:34,657 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 14:08:34,657 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 14:08:34,658 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 14:08:34,658 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 14:08:34,658 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 14:08:34,658 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 14:08:34,659 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 14:08:34,659 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 14:08:34,659 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 14:08:34,659 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 14:08:34,659 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 14:08:34,659 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 14:08:34,659 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 14:08:34,659 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 14:08:34,659 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 14:08:34,659 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 14:08:34,660 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 14:08:34,660 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 14:08:34,660 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 14:08:34,660 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 14:08:34,660 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 14:08:34,660 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 14:08:34,660 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 14:08:34,660 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 14:08:34,660 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 14:08:34,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:08:34,661 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 14:08:34,661 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 14:08:34,661 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 14:08:34,661 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 14:08:34,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:08:34,661 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 14:08:34,661 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 14:08:34,661 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 14:08:34,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 14:08:34,661 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 14:08:34,662 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 14:08:34,662 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 14:08:34,662 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 14:08:34,662 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1 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 -> d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 [2024-12-02 14:08:34,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 14:08:34,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 14:08:34,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 14:08:34,925 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 14:08:34,926 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 14:08:34,927 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2024-12-02 14:08:37,583 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/data/852ec99fd/24673d0b18cf49428b30de8dbd108a16/FLAGe16b400a8 [2024-12-02 14:08:37,801 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 14:08:37,802 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2024-12-02 14:08:37,814 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/data/852ec99fd/24673d0b18cf49428b30de8dbd108a16/FLAGe16b400a8 [2024-12-02 14:08:37,826 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/data/852ec99fd/24673d0b18cf49428b30de8dbd108a16 [2024-12-02 14:08:37,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 14:08:37,829 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 14:08:37,830 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 14:08:37,831 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 14:08:37,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 14:08:37,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:08:37" (1/1) ... [2024-12-02 14:08:37,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d442831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:37, skipping insertion in model container [2024-12-02 14:08:37,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:08:37" (1/1) ... [2024-12-02 14:08:37,857 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 14:08:38,065 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 14:08:38,066 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 14:08:38,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 14:08:38,079 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 14:08:38,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 14:08:38,142 INFO L204 MainTranslator]: Completed translation [2024-12-02 14:08:38,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38 WrapperNode [2024-12-02 14:08:38,142 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 14:08:38,143 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 14:08:38,143 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 14:08:38,143 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 14:08:38,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38" (1/1) ... [2024-12-02 14:08:38,160 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38" (1/1) ... [2024-12-02 14:08:38,177 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2024-12-02 14:08:38,177 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 14:08:38,178 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 14:08:38,178 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 14:08:38,178 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 14:08:38,187 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38" (1/1) ... [2024-12-02 14:08:38,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38" (1/1) ... [2024-12-02 14:08:38,190 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38" (1/1) ... [2024-12-02 14:08:38,205 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [3, 3]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2024-12-02 14:08:38,206 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38" (1/1) ... [2024-12-02 14:08:38,206 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38" (1/1) ... [2024-12-02 14:08:38,213 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38" (1/1) ... [2024-12-02 14:08:38,214 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38" (1/1) ... [2024-12-02 14:08:38,218 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38" (1/1) ... [2024-12-02 14:08:38,219 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38" (1/1) ... [2024-12-02 14:08:38,220 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38" (1/1) ... [2024-12-02 14:08:38,222 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 14:08:38,223 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 14:08:38,223 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 14:08:38,223 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 14:08:38,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38" (1/1) ... [2024-12-02 14:08:38,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:08:38,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:38,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 14:08:38,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 14:08:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 14:08:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 14:08:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 14:08:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 14:08:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 14:08:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 14:08:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 14:08:38,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 14:08:38,368 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 14:08:38,370 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 14:08:38,542 INFO L? ?]: Removed 59 outVars from TransFormulas that were not future-live. [2024-12-02 14:08:38,542 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 14:08:38,551 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 14:08:38,551 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 14:08:38,551 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:08:38 BoogieIcfgContainer [2024-12-02 14:08:38,551 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 14:08:38,553 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 14:08:38,553 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 14:08:38,556 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 14:08:38,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:08:37" (1/3) ... [2024-12-02 14:08:38,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d973310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:08:38, skipping insertion in model container [2024-12-02 14:08:38,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:08:38" (2/3) ... [2024-12-02 14:08:38,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d973310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:08:38, skipping insertion in model container [2024-12-02 14:08:38,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:08:38" (3/3) ... [2024-12-02 14:08:38,558 INFO L128 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2024-12-02 14:08:38,570 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 14:08:38,571 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrpbrk-alloca-2.i that has 1 procedures, 46 locations, 1 initial locations, 4 loop locations, and 13 error locations. [2024-12-02 14:08:38,603 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 14:08:38,614 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;@2ad45a0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 14:08:38,614 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-12-02 14:08:38,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 32 states have (on average 1.75) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:38,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 14:08:38,621 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:38,621 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:38,622 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:38,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:38,626 INFO L85 PathProgramCache]: Analyzing trace with hash 121325233, now seen corresponding path program 1 times [2024-12-02 14:08:38,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:38,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439894767] [2024-12-02 14:08:38,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:38,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:08:38,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:38,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439894767] [2024-12-02 14:08:38,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439894767] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:38,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:08:38,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 14:08:38,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122825747] [2024-12-02 14:08:38,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:38,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 14:08:38,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:38,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 14:08:38,920 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 14:08:38,922 INFO L87 Difference]: Start difference. First operand has 46 states, 32 states have (on average 1.75) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:38,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:38,971 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2024-12-02 14:08:38,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 14:08:38,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-12-02 14:08:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:38,979 INFO L225 Difference]: With dead ends: 44 [2024-12-02 14:08:38,979 INFO L226 Difference]: Without dead ends: 42 [2024-12-02 14:08:38,981 INFO L434 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 [2024-12-02 14:08:38,983 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:38,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 60 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:08:38,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-12-02 14:08:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-12-02 14:08:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 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) [2024-12-02 14:08:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-12-02 14:08:39,009 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 8 [2024-12-02 14:08:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:39,009 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-12-02 14:08:39,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-12-02 14:08:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 14:08:39,010 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:39,010 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:39,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 14:08:39,011 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:39,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:39,011 INFO L85 PathProgramCache]: Analyzing trace with hash 121325234, now seen corresponding path program 1 times [2024-12-02 14:08:39,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:39,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546877036] [2024-12-02 14:08:39,012 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:39,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:08:39,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:39,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546877036] [2024-12-02 14:08:39,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546877036] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:39,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:08:39,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 14:08:39,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922857751] [2024-12-02 14:08:39,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:39,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 14:08:39,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:39,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 14:08:39,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 14:08:39,290 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:39,418 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2024-12-02 14:08:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:08:39,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-12-02 14:08:39,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:39,419 INFO L225 Difference]: With dead ends: 62 [2024-12-02 14:08:39,419 INFO L226 Difference]: Without dead ends: 62 [2024-12-02 14:08:39,419 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 14:08:39,420 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 24 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:39,420 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 164 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:08:39,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-12-02 14:08:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2024-12-02 14:08:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.5) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2024-12-02 14:08:39,426 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 8 [2024-12-02 14:08:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:39,426 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2024-12-02 14:08:39,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2024-12-02 14:08:39,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 14:08:39,426 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:39,427 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:39,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 14:08:39,427 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:39,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:39,428 INFO L85 PathProgramCache]: Analyzing trace with hash 178583536, now seen corresponding path program 1 times [2024-12-02 14:08:39,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:39,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887715789] [2024-12-02 14:08:39,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:39,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:08:39,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:39,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887715789] [2024-12-02 14:08:39,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887715789] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:39,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:08:39,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 14:08:39,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374489183] [2024-12-02 14:08:39,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:39,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 14:08:39,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:39,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 14:08:39,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 14:08:39,601 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:39,653 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2024-12-02 14:08:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 14:08:39,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-12-02 14:08:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:39,654 INFO L225 Difference]: With dead ends: 51 [2024-12-02 14:08:39,654 INFO L226 Difference]: Without dead ends: 51 [2024-12-02 14:08:39,654 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 14:08:39,655 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 116 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 [2024-12-02 14:08:39,655 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 116 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:08:39,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-12-02 14:08:39,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2024-12-02 14:08:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.5) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2024-12-02 14:08:39,659 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 8 [2024-12-02 14:08:39,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:39,660 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2024-12-02 14:08:39,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2024-12-02 14:08:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-12-02 14:08:39,660 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:39,660 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:39,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 14:08:39,661 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:39,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:39,661 INFO L85 PathProgramCache]: Analyzing trace with hash -706351253, now seen corresponding path program 1 times [2024-12-02 14:08:39,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:39,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241324669] [2024-12-02 14:08:39,661 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:39,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:08:39,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:39,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241324669] [2024-12-02 14:08:39,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241324669] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:39,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352437823] [2024-12-02 14:08:39,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:39,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:39,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:39,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:39,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 14:08:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:39,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 14:08:39,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:08:39,880 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 14:08:39,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352437823] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:39,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 14:08:39,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-12-02 14:08:39,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282049735] [2024-12-02 14:08:39,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:39,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 14:08:39,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:39,881 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 14:08:39,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:08:39,882 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:39,917 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2024-12-02 14:08:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 14:08:39,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-12-02 14:08:39,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:39,919 INFO L225 Difference]: With dead ends: 61 [2024-12-02 14:08:39,919 INFO L226 Difference]: Without dead ends: 61 [2024-12-02 14:08:39,919 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:08:39,920 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:39,920 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 118 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:08:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-12-02 14:08:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2024-12-02 14:08:39,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-12-02 14:08:39,926 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 12 [2024-12-02 14:08:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:39,926 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-12-02 14:08:39,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-12-02 14:08:39,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-12-02 14:08:39,927 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:39,927 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:39,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 14:08:40,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:40,128 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:40,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1099378263, now seen corresponding path program 1 times [2024-12-02 14:08:40,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:40,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881951292] [2024-12-02 14:08:40,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:40,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:08:40,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:40,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881951292] [2024-12-02 14:08:40,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881951292] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:40,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775517954] [2024-12-02 14:08:40,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:40,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:40,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:40,428 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:40,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 14:08:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:40,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-12-02 14:08:40,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:40,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 14:08:40,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-12-02 14:08:40,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-12-02 14:08:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:08:40,799 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:08:41,043 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 14:08:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:08:41,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775517954] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:08:41,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:08:41,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-12-02 14:08:41,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324639029] [2024-12-02 14:08:41,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:08:41,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 14:08:41,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:41,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 14:08:41,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-12-02 14:08:41,103 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:41,282 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2024-12-02 14:08:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 14:08:41,282 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-12-02 14:08:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:41,283 INFO L225 Difference]: With dead ends: 52 [2024-12-02 14:08:41,283 INFO L226 Difference]: Without dead ends: 52 [2024-12-02 14:08:41,284 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2024-12-02 14:08:41,284 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:41,285 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 172 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:08:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-12-02 14:08:41,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2024-12-02 14:08:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.435897435897436) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2024-12-02 14:08:41,289 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2024-12-02 14:08:41,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:41,289 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2024-12-02 14:08:41,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:41,289 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2024-12-02 14:08:41,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-12-02 14:08:41,290 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:41,290 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:41,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-12-02 14:08:41,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:41,491 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:41,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:41,491 INFO L85 PathProgramCache]: Analyzing trace with hash -196624046, now seen corresponding path program 1 times [2024-12-02 14:08:41,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:41,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054507363] [2024-12-02 14:08:41,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:41,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:41,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:41,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054507363] [2024-12-02 14:08:41,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054507363] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:41,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:08:41,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 14:08:41,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379394363] [2024-12-02 14:08:41,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:41,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 14:08:41,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:41,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 14:08:41,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 14:08:41,539 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:41,570 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2024-12-02 14:08:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 14:08:41,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-12-02 14:08:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:41,571 INFO L225 Difference]: With dead ends: 47 [2024-12-02 14:08:41,571 INFO L226 Difference]: Without dead ends: 47 [2024-12-02 14:08:41,571 INFO L434 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 [2024-12-02 14:08:41,572 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:41,572 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 56 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:08:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-12-02 14:08:41,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-12-02 14:08:41,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:41,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2024-12-02 14:08:41,576 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 14 [2024-12-02 14:08:41,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:41,576 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2024-12-02 14:08:41,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:41,576 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2024-12-02 14:08:41,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-12-02 14:08:41,577 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:41,577 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:41,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 14:08:41,577 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:41,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:41,578 INFO L85 PathProgramCache]: Analyzing trace with hash -196624045, now seen corresponding path program 1 times [2024-12-02 14:08:41,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:41,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805969846] [2024-12-02 14:08:41,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:41,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:41,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:41,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805969846] [2024-12-02 14:08:41,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805969846] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:41,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:08:41,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 14:08:41,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384189265] [2024-12-02 14:08:41,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:41,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 14:08:41,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:41,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 14:08:41,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 14:08:41,711 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:41,790 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2024-12-02 14:08:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 14:08:41,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-12-02 14:08:41,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:41,791 INFO L225 Difference]: With dead ends: 73 [2024-12-02 14:08:41,791 INFO L226 Difference]: Without dead ends: 73 [2024-12-02 14:08:41,792 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 14:08:41,792 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:41,793 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 132 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:08:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-12-02 14:08:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2024-12-02 14:08:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 69 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2024-12-02 14:08:41,798 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 14 [2024-12-02 14:08:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:41,798 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2024-12-02 14:08:41,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2024-12-02 14:08:41,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-12-02 14:08:41,799 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:41,800 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:41,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 14:08:41,800 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:41,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:41,801 INFO L85 PathProgramCache]: Analyzing trace with hash 504440533, now seen corresponding path program 1 times [2024-12-02 14:08:41,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:41,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399962606] [2024-12-02 14:08:41,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:41,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:41,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:41,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399962606] [2024-12-02 14:08:41,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399962606] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:41,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:08:41,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 14:08:41,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028580291] [2024-12-02 14:08:41,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:41,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:08:41,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:41,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:08:41,936 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:08:41,936 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:42,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:42,014 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2024-12-02 14:08:42,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 14:08:42,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-12-02 14:08:42,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:42,015 INFO L225 Difference]: With dead ends: 75 [2024-12-02 14:08:42,016 INFO L226 Difference]: Without dead ends: 75 [2024-12-02 14:08:42,016 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-12-02 14:08:42,016 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:42,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 121 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:08:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-12-02 14:08:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2024-12-02 14:08:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 72 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) [2024-12-02 14:08:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2024-12-02 14:08:42,022 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 14 [2024-12-02 14:08:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:42,023 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2024-12-02 14:08:42,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2024-12-02 14:08:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 14:08:42,024 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:42,024 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:42,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 14:08:42,024 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:42,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:42,025 INFO L85 PathProgramCache]: Analyzing trace with hash 487237132, now seen corresponding path program 1 times [2024-12-02 14:08:42,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:42,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002944151] [2024-12-02 14:08:42,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:42,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:42,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:42,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002944151] [2024-12-02 14:08:42,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002944151] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:42,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326645867] [2024-12-02 14:08:42,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:42,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:42,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:42,078 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:42,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 14:08:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:42,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 14:08:42,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:42,187 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 14:08:42,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326645867] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:42,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 14:08:42,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-12-02 14:08:42,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525753124] [2024-12-02 14:08:42,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:42,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 14:08:42,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:42,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 14:08:42,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:08:42,189 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:42,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:42,216 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2024-12-02 14:08:42,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 14:08:42,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-12-02 14:08:42,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:42,217 INFO L225 Difference]: With dead ends: 72 [2024-12-02 14:08:42,217 INFO L226 Difference]: Without dead ends: 72 [2024-12-02 14:08:42,217 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:08:42,218 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:42,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 109 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:08:42,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-12-02 14:08:42,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2024-12-02 14:08:42,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 70 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2024-12-02 14:08:42,222 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 18 [2024-12-02 14:08:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:42,222 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2024-12-02 14:08:42,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2024-12-02 14:08:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 14:08:42,223 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:42,223 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:42,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 14:08:42,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-12-02 14:08:42,424 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:42,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:42,424 INFO L85 PathProgramCache]: Analyzing trace with hash 487239310, now seen corresponding path program 1 times [2024-12-02 14:08:42,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:42,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540875543] [2024-12-02 14:08:42,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:42,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:42,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:42,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540875543] [2024-12-02 14:08:42,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540875543] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:42,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260122301] [2024-12-02 14:08:42,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:42,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:42,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:42,531 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:42,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 14:08:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:42,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 14:08:42,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:42,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:08:42,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-12-02 14:08:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:42,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260122301] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:08:42,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:08:42,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-12-02 14:08:42,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803999338] [2024-12-02 14:08:42,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:08:42,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 14:08:42,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:42,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 14:08:42,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-12-02 14:08:42,818 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) 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) [2024-12-02 14:08:42,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:42,918 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2024-12-02 14:08:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 14:08:42,918 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) 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 18 [2024-12-02 14:08:42,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:42,919 INFO L225 Difference]: With dead ends: 90 [2024-12-02 14:08:42,919 INFO L226 Difference]: Without dead ends: 90 [2024-12-02 14:08:42,919 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-12-02 14:08:42,919 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:42,920 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 195 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:08:42,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-12-02 14:08:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2024-12-02 14:08:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 88 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2024-12-02 14:08:42,924 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 18 [2024-12-02 14:08:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:42,924 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2024-12-02 14:08:42,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) 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) [2024-12-02 14:08:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2024-12-02 14:08:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 14:08:42,925 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:42,925 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:42,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 14:08:43,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 14:08:43,126 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:43,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:43,127 INFO L85 PathProgramCache]: Analyzing trace with hash -792626546, now seen corresponding path program 1 times [2024-12-02 14:08:43,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:43,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149738623] [2024-12-02 14:08:43,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:43,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:43,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:43,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149738623] [2024-12-02 14:08:43,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149738623] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:43,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486526403] [2024-12-02 14:08:43,345 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:43,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:43,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:43,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:43,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 14:08:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:43,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 14:08:43,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:43,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-12-02 14:08:43,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 14:08:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:43,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:08:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:44,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486526403] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:08:44,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:08:44,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-12-02 14:08:44,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550748797] [2024-12-02 14:08:44,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:08:44,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 14:08:44,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:44,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 14:08:44,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2024-12-02 14:08:44,011 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:44,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:44,192 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2024-12-02 14:08:44,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 14:08:44,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-12-02 14:08:44,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:44,194 INFO L225 Difference]: With dead ends: 90 [2024-12-02 14:08:44,194 INFO L226 Difference]: Without dead ends: 90 [2024-12-02 14:08:44,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2024-12-02 14:08:44,195 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 19 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:44,195 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 211 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:08:44,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-12-02 14:08:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2024-12-02 14:08:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:44,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2024-12-02 14:08:44,199 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 18 [2024-12-02 14:08:44,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:44,199 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2024-12-02 14:08:44,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:44,200 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2024-12-02 14:08:44,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 14:08:44,200 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:44,200 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:44,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 14:08:44,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:44,401 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:44,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:44,402 INFO L85 PathProgramCache]: Analyzing trace with hash -533829044, now seen corresponding path program 1 times [2024-12-02 14:08:44,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:44,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353782461] [2024-12-02 14:08:44,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:44,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:44,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:44,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353782461] [2024-12-02 14:08:44,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353782461] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:44,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:08:44,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 14:08:44,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28945916] [2024-12-02 14:08:44,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:44,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:08:44,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:44,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:08:44,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:08:44,503 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:44,533 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2024-12-02 14:08:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 14:08:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-12-02 14:08:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:44,534 INFO L225 Difference]: With dead ends: 83 [2024-12-02 14:08:44,534 INFO L226 Difference]: Without dead ends: 83 [2024-12-02 14:08:44,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:08:44,534 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:44,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 78 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:08:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-12-02 14:08:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2024-12-02 14:08:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 66 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2024-12-02 14:08:44,538 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 18 [2024-12-02 14:08:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:44,538 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2024-12-02 14:08:44,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2024-12-02 14:08:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 14:08:44,539 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:44,539 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:44,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-12-02 14:08:44,540 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:44,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:44,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1198448363, now seen corresponding path program 1 times [2024-12-02 14:08:44,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:44,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945461538] [2024-12-02 14:08:44,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:44,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:44,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:44,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945461538] [2024-12-02 14:08:44,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945461538] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:44,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:08:44,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 14:08:44,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779670446] [2024-12-02 14:08:44,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:44,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:08:44,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:44,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:08:44,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:08:44,631 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:44,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:44,667 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2024-12-02 14:08:44,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 14:08:44,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-12-02 14:08:44,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:44,668 INFO L225 Difference]: With dead ends: 68 [2024-12-02 14:08:44,668 INFO L226 Difference]: Without dead ends: 68 [2024-12-02 14:08:44,668 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:08:44,668 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:44,669 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 115 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:08:44,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-12-02 14:08:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2024-12-02 14:08:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 62 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) [2024-12-02 14:08:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2024-12-02 14:08:44,671 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 19 [2024-12-02 14:08:44,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:44,671 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2024-12-02 14:08:44,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2024-12-02 14:08:44,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-02 14:08:44,672 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:44,673 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:44,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 14:08:44,673 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:44,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:44,673 INFO L85 PathProgramCache]: Analyzing trace with hash 600992369, now seen corresponding path program 1 times [2024-12-02 14:08:44,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:44,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653308687] [2024-12-02 14:08:44,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:44,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:44,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:44,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653308687] [2024-12-02 14:08:44,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653308687] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:44,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:08:44,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 14:08:44,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438478035] [2024-12-02 14:08:44,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:44,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 14:08:44,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:44,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 14:08:44,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 14:08:44,751 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:44,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:44,790 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2024-12-02 14:08:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 14:08:44,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-12-02 14:08:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:44,791 INFO L225 Difference]: With dead ends: 63 [2024-12-02 14:08:44,791 INFO L226 Difference]: Without dead ends: 63 [2024-12-02 14:08:44,792 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 14:08:44,792 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:44,792 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 81 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:08:44,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-12-02 14:08:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-12-02 14:08:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.206896551724138) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2024-12-02 14:08:44,795 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 22 [2024-12-02 14:08:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:44,795 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2024-12-02 14:08:44,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2024-12-02 14:08:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-02 14:08:44,796 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:44,796 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:44,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-12-02 14:08:44,796 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:44,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:44,796 INFO L85 PathProgramCache]: Analyzing trace with hash 600992370, now seen corresponding path program 1 times [2024-12-02 14:08:44,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:44,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661049120] [2024-12-02 14:08:44,796 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:44,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:44,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:44,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661049120] [2024-12-02 14:08:44,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661049120] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:44,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573665251] [2024-12-02 14:08:44,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:44,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:44,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:44,979 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:44,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 14:08:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:45,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-12-02 14:08:45,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:45,098 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-12-02 14:08:45,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-12-02 14:08:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:45,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:08:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:45,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573665251] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:45,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 14:08:45,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 8] total 20 [2024-12-02 14:08:45,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582255752] [2024-12-02 14:08:45,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:45,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 14:08:45,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:45,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 14:08:45,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-12-02 14:08:45,593 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:45,683 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2024-12-02 14:08:45,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 14:08:45,684 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-12-02 14:08:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:45,684 INFO L225 Difference]: With dead ends: 80 [2024-12-02 14:08:45,685 INFO L226 Difference]: Without dead ends: 80 [2024-12-02 14:08:45,685 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-12-02 14:08:45,686 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:45,686 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 161 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:08:45,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-12-02 14:08:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-12-02 14:08:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 79 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2024-12-02 14:08:45,689 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 22 [2024-12-02 14:08:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:45,689 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2024-12-02 14:08:45,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:45,690 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2024-12-02 14:08:45,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-02 14:08:45,690 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:45,690 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:45,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 14:08:45,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-02 14:08:45,891 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:45,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:45,892 INFO L85 PathProgramCache]: Analyzing trace with hash -216656080, now seen corresponding path program 1 times [2024-12-02 14:08:45,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:45,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376133800] [2024-12-02 14:08:45,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:45,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:46,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:46,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376133800] [2024-12-02 14:08:46,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376133800] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:46,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606136826] [2024-12-02 14:08:46,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:46,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:46,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:46,061 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:46,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 14:08:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:46,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-12-02 14:08:46,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:46,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:08:46,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 14:08:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:46,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606136826] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:08:46,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:08:46,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-12-02 14:08:46,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205862998] [2024-12-02 14:08:46,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:08:46,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 14:08:46,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:46,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 14:08:46,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-12-02 14:08:46,332 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:46,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:46,449 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2024-12-02 14:08:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 14:08:46,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-12-02 14:08:46,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:46,450 INFO L225 Difference]: With dead ends: 88 [2024-12-02 14:08:46,450 INFO L226 Difference]: Without dead ends: 88 [2024-12-02 14:08:46,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-12-02 14:08:46,451 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:46,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 229 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:08:46,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-12-02 14:08:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2024-12-02 14:08:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.2) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2024-12-02 14:08:46,455 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 22 [2024-12-02 14:08:46,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:46,455 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2024-12-02 14:08:46,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2024-12-02 14:08:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 14:08:46,456 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:46,456 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:46,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 14:08:46,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 14:08:46,657 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:46,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:46,657 INFO L85 PathProgramCache]: Analyzing trace with hash 335619097, now seen corresponding path program 1 times [2024-12-02 14:08:46,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:46,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515803259] [2024-12-02 14:08:46,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:46,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:46,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:46,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515803259] [2024-12-02 14:08:46,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515803259] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:46,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401857962] [2024-12-02 14:08:46,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:46,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:46,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:46,861 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:46,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 14:08:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:46,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-12-02 14:08:46,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:47,051 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:08:47,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 14:08:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:47,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401857962] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:08:47,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:08:47,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-12-02 14:08:47,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554782061] [2024-12-02 14:08:47,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:08:47,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-02 14:08:47,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:47,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-02 14:08:47,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-12-02 14:08:47,128 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 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) [2024-12-02 14:08:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:47,246 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2024-12-02 14:08:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 14:08:47,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 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 [2024-12-02 14:08:47,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:47,247 INFO L225 Difference]: With dead ends: 69 [2024-12-02 14:08:47,247 INFO L226 Difference]: Without dead ends: 69 [2024-12-02 14:08:47,247 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-12-02 14:08:47,248 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:47,248 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 197 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:08:47,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-12-02 14:08:47,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2024-12-02 14:08:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 65 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2024-12-02 14:08:47,251 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 27 [2024-12-02 14:08:47,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:47,251 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2024-12-02 14:08:47,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 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) [2024-12-02 14:08:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2024-12-02 14:08:47,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 14:08:47,251 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:47,251 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:47,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-12-02 14:08:47,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 14:08:47,452 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:47,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:47,452 INFO L85 PathProgramCache]: Analyzing trace with hash 335619096, now seen corresponding path program 1 times [2024-12-02 14:08:47,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:47,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76195406] [2024-12-02 14:08:47,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:47,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:47,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:47,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76195406] [2024-12-02 14:08:47,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76195406] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:47,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:08:47,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 14:08:47,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319665405] [2024-12-02 14:08:47,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:47,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 14:08:47,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:47,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 14:08:47,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 14:08:47,526 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:47,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:47,585 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2024-12-02 14:08:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 14:08:47,586 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2024-12-02 14:08:47,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:47,586 INFO L225 Difference]: With dead ends: 70 [2024-12-02 14:08:47,586 INFO L226 Difference]: Without dead ends: 70 [2024-12-02 14:08:47,586 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-12-02 14:08:47,587 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:47,587 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 115 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:08:47,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-12-02 14:08:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2024-12-02 14:08:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2024-12-02 14:08:47,590 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 27 [2024-12-02 14:08:47,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:47,590 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2024-12-02 14:08:47,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2024-12-02 14:08:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 14:08:47,591 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:47,591 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:47,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-12-02 14:08:47,591 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:47,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:47,591 INFO L85 PathProgramCache]: Analyzing trace with hash 335704432, now seen corresponding path program 1 times [2024-12-02 14:08:47,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:47,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166938864] [2024-12-02 14:08:47,591 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:47,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 14:08:47,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:47,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166938864] [2024-12-02 14:08:47,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166938864] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:47,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:08:47,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 14:08:47,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650937013] [2024-12-02 14:08:47,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:47,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:08:47,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:47,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:08:47,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:08:47,717 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:47,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:47,736 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2024-12-02 14:08:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:08:47,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2024-12-02 14:08:47,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:47,737 INFO L225 Difference]: With dead ends: 64 [2024-12-02 14:08:47,737 INFO L226 Difference]: Without dead ends: 61 [2024-12-02 14:08:47,737 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:08:47,738 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:47,738 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 60 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:08:47,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-12-02 14:08:47,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-12-02 14:08:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2024-12-02 14:08:47,740 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 27 [2024-12-02 14:08:47,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:47,740 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2024-12-02 14:08:47,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2024-12-02 14:08:47,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-12-02 14:08:47,741 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:47,741 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:47,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-12-02 14:08:47,741 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:47,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:47,741 INFO L85 PathProgramCache]: Analyzing trace with hash 674848063, now seen corresponding path program 1 times [2024-12-02 14:08:47,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:47,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113078846] [2024-12-02 14:08:47,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:47,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 14:08:47,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:47,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113078846] [2024-12-02 14:08:47,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113078846] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:47,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:08:47,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 14:08:47,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074489136] [2024-12-02 14:08:47,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:47,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 14:08:47,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:47,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 14:08:47,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-12-02 14:08:47,940 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:47,991 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2024-12-02 14:08:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 14:08:47,991 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2024-12-02 14:08:47,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:47,992 INFO L225 Difference]: With dead ends: 81 [2024-12-02 14:08:47,992 INFO L226 Difference]: Without dead ends: 48 [2024-12-02 14:08:47,992 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-12-02 14:08:47,992 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:47,993 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 197 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:08:47,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-12-02 14:08:47,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-12-02 14:08:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.1521739130434783) 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) [2024-12-02 14:08:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2024-12-02 14:08:47,995 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 31 [2024-12-02 14:08:47,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:47,995 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2024-12-02 14:08:47,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:47,995 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2024-12-02 14:08:47,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-12-02 14:08:47,996 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:47,996 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:47,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-12-02 14:08:47,996 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:47,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:47,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2061051457, now seen corresponding path program 1 times [2024-12-02 14:08:47,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:47,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190912656] [2024-12-02 14:08:47,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:47,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:48,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:48,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190912656] [2024-12-02 14:08:48,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190912656] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:48,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319254172] [2024-12-02 14:08:48,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:48,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:48,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:48,264 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:48,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 14:08:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:48,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-12-02 14:08:48,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:48,420 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 [2024-12-02 14:08:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:48,442 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:08:48,458 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 13 treesize of output 11 [2024-12-02 14:08:48,464 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 14 treesize of output 12 [2024-12-02 14:08:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:48,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319254172] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:08:48,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:08:48,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-12-02 14:08:48,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397095788] [2024-12-02 14:08:48,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:08:48,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 14:08:48,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:48,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 14:08:48,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-12-02 14:08:48,532 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2024-12-02 14:08:48,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:48,636 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2024-12-02 14:08:48,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 14:08:48,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) Word has length 31 [2024-12-02 14:08:48,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:48,637 INFO L225 Difference]: With dead ends: 82 [2024-12-02 14:08:48,637 INFO L226 Difference]: Without dead ends: 62 [2024-12-02 14:08:48,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-12-02 14:08:48,638 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:48,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 219 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:08:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-12-02 14:08:48,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2024-12-02 14:08:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 55 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2024-12-02 14:08:48,640 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 31 [2024-12-02 14:08:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:48,640 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2024-12-02 14:08:48,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2024-12-02 14:08:48,641 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2024-12-02 14:08:48,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-12-02 14:08:48,641 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:48,641 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:48,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-12-02 14:08:48,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:48,841 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:48,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:48,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1730057112, now seen corresponding path program 2 times [2024-12-02 14:08:48,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:48,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176751667] [2024-12-02 14:08:48,842 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:08:48,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:48,856 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:08:48,856 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:08:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:49,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:49,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176751667] [2024-12-02 14:08:49,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176751667] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:49,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102132246] [2024-12-02 14:08:49,090 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:08:49,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:49,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:49,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:49,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 14:08:49,180 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:08:49,180 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:08:49,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-12-02 14:08:49,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:49,319 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:08:49,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 14:08:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:49,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102132246] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:08:49,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:08:49,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-12-02 14:08:49,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595873165] [2024-12-02 14:08:49,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:08:49,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 14:08:49,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:49,515 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 14:08:49,515 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-12-02 14:08:49,516 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 21 states, 20 states have (on average 3.55) internal successors, (71), 21 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) [2024-12-02 14:08:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:49,692 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2024-12-02 14:08:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 14:08:49,693 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.55) internal successors, (71), 21 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 35 [2024-12-02 14:08:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:49,693 INFO L225 Difference]: With dead ends: 73 [2024-12-02 14:08:49,693 INFO L226 Difference]: Without dead ends: 73 [2024-12-02 14:08:49,694 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-12-02 14:08:49,695 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:49,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 234 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:08:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-12-02 14:08:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2024-12-02 14:08:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2024-12-02 14:08:49,698 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 35 [2024-12-02 14:08:49,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:49,698 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2024-12-02 14:08:49,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.55) internal successors, (71), 21 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) [2024-12-02 14:08:49,698 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2024-12-02 14:08:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-12-02 14:08:49,698 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:49,699 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:49,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 14:08:49,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-12-02 14:08:49,899 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:49,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:49,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2092193220, now seen corresponding path program 1 times [2024-12-02 14:08:49,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:49,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512876373] [2024-12-02 14:08:49,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:49,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 14:08:50,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:50,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512876373] [2024-12-02 14:08:50,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512876373] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:08:50,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:08:50,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 14:08:50,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325729535] [2024-12-02 14:08:50,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:08:50,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 14:08:50,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:50,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 14:08:50,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-12-02 14:08:50,124 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:50,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:50,214 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2024-12-02 14:08:50,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 14:08:50,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-12-02 14:08:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:50,215 INFO L225 Difference]: With dead ends: 93 [2024-12-02 14:08:50,215 INFO L226 Difference]: Without dead ends: 93 [2024-12-02 14:08:50,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-12-02 14:08:50,216 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:50,216 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 199 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:08:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-12-02 14:08:50,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2024-12-02 14:08:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 91 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2024-12-02 14:08:50,219 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 36 [2024-12-02 14:08:50,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:50,219 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2024-12-02 14:08:50,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:50,219 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2024-12-02 14:08:50,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-12-02 14:08:50,220 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:50,220 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:50,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-12-02 14:08:50,220 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:50,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2130387518, now seen corresponding path program 1 times [2024-12-02 14:08:50,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:50,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853838267] [2024-12-02 14:08:50,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:50,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:08:50,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:50,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853838267] [2024-12-02 14:08:50,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853838267] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:50,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360868528] [2024-12-02 14:08:50,557 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:08:50,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:50,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:50,559 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:50,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 14:08:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:08:50,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-12-02 14:08:50,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:50,728 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 [2024-12-02 14:08:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:08:50,766 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:08:50,791 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 13 treesize of output 11 [2024-12-02 14:08:50,793 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 14 treesize of output 12 [2024-12-02 14:08:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:08:50,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360868528] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:08:50,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:08:50,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 20 [2024-12-02 14:08:50,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444032108] [2024-12-02 14:08:50,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:08:50,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 14:08:50,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:50,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 14:08:50,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-12-02 14:08:50,880 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:51,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:51,099 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2024-12-02 14:08:51,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 14:08:51,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-12-02 14:08:51,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:51,100 INFO L225 Difference]: With dead ends: 124 [2024-12-02 14:08:51,101 INFO L226 Difference]: Without dead ends: 124 [2024-12-02 14:08:51,101 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2024-12-02 14:08:51,101 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 75 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:51,102 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 246 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:08:51,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-12-02 14:08:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2024-12-02 14:08:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 95 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) [2024-12-02 14:08:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2024-12-02 14:08:51,106 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 36 [2024-12-02 14:08:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:51,106 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2024-12-02 14:08:51,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2024-12-02 14:08:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-12-02 14:08:51,106 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:51,106 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2024-12-02 14:08:51,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 14:08:51,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-12-02 14:08:51,307 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:51,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:51,308 INFO L85 PathProgramCache]: Analyzing trace with hash 951322167, now seen corresponding path program 2 times [2024-12-02 14:08:51,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:51,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111813347] [2024-12-02 14:08:51,308 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:08:51,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:51,328 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:08:51,329 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:08:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:08:51,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:51,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111813347] [2024-12-02 14:08:51,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111813347] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:51,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175473967] [2024-12-02 14:08:51,656 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:08:51,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:51,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:51,658 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:51,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 14:08:51,750 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:08:51,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:08:51,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-12-02 14:08:51,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:08:51,949 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:08:52,089 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 21 treesize of output 17 [2024-12-02 14:08:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:08:52,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175473967] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:08:52,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:08:52,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-12-02 14:08:52,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328391775] [2024-12-02 14:08:52,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:08:52,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 14:08:52,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:52,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 14:08:52,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2024-12-02 14:08:52,228 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:52,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:52,534 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2024-12-02 14:08:52,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 14:08:52,535 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-12-02 14:08:52,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:52,536 INFO L225 Difference]: With dead ends: 117 [2024-12-02 14:08:52,536 INFO L226 Difference]: Without dead ends: 117 [2024-12-02 14:08:52,536 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2024-12-02 14:08:52,537 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 56 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:52,537 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 312 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:08:52,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-12-02 14:08:52,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 106. [2024-12-02 14:08:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 104 states have (on average 1.125) internal successors, (117), 105 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2024-12-02 14:08:52,541 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 40 [2024-12-02 14:08:52,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:52,541 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2024-12-02 14:08:52,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:52,541 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2024-12-02 14:08:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-12-02 14:08:52,542 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:52,542 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:52,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 14:08:52,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:52,742 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:52,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:52,742 INFO L85 PathProgramCache]: Analyzing trace with hash -66179063, now seen corresponding path program 3 times [2024-12-02 14:08:52,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:52,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802349047] [2024-12-02 14:08:52,743 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:08:52,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:52,766 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 14:08:52,766 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:08:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:53,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:53,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802349047] [2024-12-02 14:08:53,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802349047] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:53,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890132142] [2024-12-02 14:08:53,128 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:08:53,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:53,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:53,131 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:53,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 14:08:53,234 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 14:08:53,235 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:08:53,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-12-02 14:08:53,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:53,344 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 [2024-12-02 14:08:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:53,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:08:53,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:08:53,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:08:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:08:53,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890132142] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:08:53,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:08:53,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 27 [2024-12-02 14:08:53,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319023570] [2024-12-02 14:08:53,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:08:53,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-12-02 14:08:53,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:53,585 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-12-02 14:08:53,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2024-12-02 14:08:53,585 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:53,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:53,726 INFO L93 Difference]: Finished difference Result 179 states and 194 transitions. [2024-12-02 14:08:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 14:08:53,726 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-12-02 14:08:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:53,727 INFO L225 Difference]: With dead ends: 179 [2024-12-02 14:08:53,727 INFO L226 Difference]: Without dead ends: 152 [2024-12-02 14:08:53,727 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-12-02 14:08:53,728 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:53,728 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 421 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:08:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-12-02 14:08:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2024-12-02 14:08:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 143 states have (on average 1.1118881118881119) internal successors, (159), 144 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) [2024-12-02 14:08:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 159 transitions. [2024-12-02 14:08:53,732 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 159 transitions. Word has length 44 [2024-12-02 14:08:53,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:53,733 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 159 transitions. [2024-12-02 14:08:53,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:53,733 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 159 transitions. [2024-12-02 14:08:53,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-12-02 14:08:53,733 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:53,733 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:53,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 14:08:53,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:53,934 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:53,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:53,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1276275481, now seen corresponding path program 3 times [2024-12-02 14:08:53,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:53,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118331090] [2024-12-02 14:08:53,934 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:08:53,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:53,959 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 14:08:53,959 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:08:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:08:54,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:54,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118331090] [2024-12-02 14:08:54,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118331090] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:54,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685948431] [2024-12-02 14:08:54,572 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:08:54,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:54,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:54,574 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:54,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 14:08:54,696 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 14:08:54,696 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:08:54,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-12-02 14:08:54,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:54,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:08:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:08:54,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:08:54,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:08:54,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:08:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:08:54,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685948431] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:08:54,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:08:54,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 27 [2024-12-02 14:08:54,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391202892] [2024-12-02 14:08:54,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:08:54,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-12-02 14:08:54,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:54,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-12-02 14:08:54,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-12-02 14:08:54,923 INFO L87 Difference]: Start difference. First operand 145 states and 159 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:55,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:55,296 INFO L93 Difference]: Finished difference Result 220 states and 237 transitions. [2024-12-02 14:08:55,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 14:08:55,296 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 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 45 [2024-12-02 14:08:55,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:55,297 INFO L225 Difference]: With dead ends: 220 [2024-12-02 14:08:55,297 INFO L226 Difference]: Without dead ends: 202 [2024-12-02 14:08:55,298 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2024-12-02 14:08:55,298 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:55,299 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 541 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:08:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-12-02 14:08:55,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 187. [2024-12-02 14:08:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 185 states have (on average 1.1081081081081081) internal successors, (205), 186 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:55,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 205 transitions. [2024-12-02 14:08:55,303 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 205 transitions. Word has length 45 [2024-12-02 14:08:55,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:55,304 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 205 transitions. [2024-12-02 14:08:55,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:55,304 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 205 transitions. [2024-12-02 14:08:55,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-12-02 14:08:55,304 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:55,304 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:55,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 14:08:55,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-12-02 14:08:55,505 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:55,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:55,505 INFO L85 PathProgramCache]: Analyzing trace with hash -118398654, now seen corresponding path program 4 times [2024-12-02 14:08:55,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:55,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764416589] [2024-12-02 14:08:55,506 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:08:55,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:55,520 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:08:55,520 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:08:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 14:08:56,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:56,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764416589] [2024-12-02 14:08:56,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764416589] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:56,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400265428] [2024-12-02 14:08:56,122 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:08:56,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:56,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:56,124 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:56,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 14:08:56,210 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:08:56,210 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:08:56,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-12-02 14:08:56,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:56,322 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 14 treesize of output 10 [2024-12-02 14:08:56,804 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-12-02 14:08:56,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2024-12-02 14:08:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 14:08:56,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:08:57,478 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 29 treesize of output 25 [2024-12-02 14:08:57,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2024-12-02 14:08:57,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 14:08:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 14:08:57,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400265428] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:08:57,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:08:57,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 44 [2024-12-02 14:08:57,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054400464] [2024-12-02 14:08:57,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:08:57,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-12-02 14:08:57,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:57,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-12-02 14:08:57,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2024-12-02 14:08:57,785 INFO L87 Difference]: Start difference. First operand 187 states and 205 transitions. Second operand has 45 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 45 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:58,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:58,323 INFO L93 Difference]: Finished difference Result 187 states and 202 transitions. [2024-12-02 14:08:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 14:08:58,324 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 45 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-12-02 14:08:58,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:58,324 INFO L225 Difference]: With dead ends: 187 [2024-12-02 14:08:58,324 INFO L226 Difference]: Without dead ends: 109 [2024-12-02 14:08:58,325 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=289, Invalid=2467, Unknown=0, NotChecked=0, Total=2756 [2024-12-02 14:08:58,325 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:58,325 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 334 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:08:58,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-12-02 14:08:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 89. [2024-12-02 14:08:58,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 88 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2024-12-02 14:08:58,328 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 48 [2024-12-02 14:08:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:58,328 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2024-12-02 14:08:58,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 45 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2024-12-02 14:08:58,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-12-02 14:08:58,329 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:58,329 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:58,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 14:08:58,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-12-02 14:08:58,529 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:58,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:58,530 INFO L85 PathProgramCache]: Analyzing trace with hash 603134222, now seen corresponding path program 4 times [2024-12-02 14:08:58,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:58,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791996216] [2024-12-02 14:08:58,530 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:08:58,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:58,539 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:08:58,540 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:08:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:08:58,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:08:58,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791996216] [2024-12-02 14:08:58,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791996216] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:08:58,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930956804] [2024-12-02 14:08:58,713 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:08:58,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:08:58,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:08:58,715 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:08:58,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 14:08:58,820 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:08:58,820 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:08:58,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-12-02 14:08:58,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:08:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:08:58,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:08:59,139 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 [2024-12-02 14:08:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:08:59,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930956804] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:08:59,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:08:59,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2024-12-02 14:08:59,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283798586] [2024-12-02 14:08:59,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:08:59,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 14:08:59,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:08:59,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 14:08:59,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2024-12-02 14:08:59,168 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 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) [2024-12-02 14:08:59,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:08:59,432 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2024-12-02 14:08:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 14:08:59,432 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 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 49 [2024-12-02 14:08:59,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:08:59,433 INFO L225 Difference]: With dead ends: 113 [2024-12-02 14:08:59,433 INFO L226 Difference]: Without dead ends: 113 [2024-12-02 14:08:59,434 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-12-02 14:08:59,434 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 74 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:08:59,434 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 303 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:08:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-12-02 14:08:59,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2024-12-02 14:08:59,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0918367346938775) internal successors, (107), 98 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:08:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2024-12-02 14:08:59,436 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 49 [2024-12-02 14:08:59,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:08:59,437 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2024-12-02 14:08:59,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 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) [2024-12-02 14:08:59,437 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2024-12-02 14:08:59,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-12-02 14:08:59,437 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:08:59,437 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:08:59,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-12-02 14:08:59,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-12-02 14:08:59,638 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:08:59,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:08:59,638 INFO L85 PathProgramCache]: Analyzing trace with hash 506179696, now seen corresponding path program 5 times [2024-12-02 14:08:59,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:08:59,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384090970] [2024-12-02 14:08:59,639 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:08:59,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:08:59,662 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 14:08:59,662 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:09:00,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:00,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384090970] [2024-12-02 14:09:00,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384090970] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:00,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439807961] [2024-12-02 14:09:00,605 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:09:00,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:00,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:00,607 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:00,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 14:09:00,692 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 14:09:00,692 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:00,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-12-02 14:09:00,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:00,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:09:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:00,893 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:00,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:09:00,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:09:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:00,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439807961] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:00,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:00,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16, 16] total 33 [2024-12-02 14:09:00,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996831206] [2024-12-02 14:09:00,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:00,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-12-02 14:09:00,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:00,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-12-02 14:09:00,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2024-12-02 14:09:00,999 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 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) [2024-12-02 14:09:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:01,820 INFO L93 Difference]: Finished difference Result 172 states and 183 transitions. [2024-12-02 14:09:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-12-02 14:09:01,821 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 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 54 [2024-12-02 14:09:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:01,822 INFO L225 Difference]: With dead ends: 172 [2024-12-02 14:09:01,822 INFO L226 Difference]: Without dead ends: 116 [2024-12-02 14:09:01,823 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=188, Invalid=2262, Unknown=0, NotChecked=0, Total=2450 [2024-12-02 14:09:01,823 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 60 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:01,823 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 721 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 14:09:01,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-12-02 14:09:01,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2024-12-02 14:09:01,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0849056603773586) internal successors, (115), 106 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2024-12-02 14:09:01,826 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 54 [2024-12-02 14:09:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:01,827 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2024-12-02 14:09:01,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 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) [2024-12-02 14:09:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2024-12-02 14:09:01,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-12-02 14:09:01,827 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:01,827 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:01,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 14:09:02,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:02,028 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:02,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash -112531415, now seen corresponding path program 6 times [2024-12-02 14:09:02,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:02,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928470308] [2024-12-02 14:09:02,028 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:09:02,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:02,057 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-12-02 14:09:02,057 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:02,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:02,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928470308] [2024-12-02 14:09:02,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928470308] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:02,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791302200] [2024-12-02 14:09:02,321 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:09:02,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:02,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:02,323 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:02,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 14:09:02,481 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-12-02 14:09:02,481 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:02,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-12-02 14:09:02,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:02,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:03,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-12-02 14:09:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:03,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791302200] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:03,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:03,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2024-12-02 14:09:03,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824597096] [2024-12-02 14:09:03,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:03,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-12-02 14:09:03,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:03,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-12-02 14:09:03,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 14:09:03,148 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 34 states, 33 states have (on average 4.212121212121212) internal successors, (139), 34 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:03,496 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2024-12-02 14:09:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 14:09:03,497 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.212121212121212) internal successors, (139), 34 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-12-02 14:09:03,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:03,498 INFO L225 Difference]: With dead ends: 136 [2024-12-02 14:09:03,498 INFO L226 Difference]: Without dead ends: 136 [2024-12-02 14:09:03,498 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=1657, Unknown=0, NotChecked=0, Total=1892 [2024-12-02 14:09:03,498 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 101 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:03,499 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 559 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:09:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-12-02 14:09:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2024-12-02 14:09:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0862068965517242) internal successors, (126), 116 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) [2024-12-02 14:09:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2024-12-02 14:09:03,501 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 58 [2024-12-02 14:09:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:03,501 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2024-12-02 14:09:03,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.212121212121212) internal successors, (139), 34 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2024-12-02 14:09:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-12-02 14:09:03,502 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:03,502 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:03,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 14:09:03,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-12-02 14:09:03,703 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:03,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:03,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1886394933, now seen corresponding path program 7 times [2024-12-02 14:09:03,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:03,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620502924] [2024-12-02 14:09:03,703 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:09:03,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:09:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:04,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:04,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620502924] [2024-12-02 14:09:04,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620502924] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:04,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077448834] [2024-12-02 14:09:04,097 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:09:04,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:04,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:04,099 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:04,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 14:09:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:09:04,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-12-02 14:09:04,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:04,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:09:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:04,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:04,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:09:04,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:09:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:04,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077448834] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:04,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:04,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 32 [2024-12-02 14:09:04,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093409026] [2024-12-02 14:09:04,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:04,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-12-02 14:09:04,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:04,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-12-02 14:09:04,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2024-12-02 14:09:04,491 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:04,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:04,950 INFO L93 Difference]: Finished difference Result 202 states and 215 transitions. [2024-12-02 14:09:04,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 14:09:04,950 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 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 63 [2024-12-02 14:09:04,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:04,951 INFO L225 Difference]: With dead ends: 202 [2024-12-02 14:09:04,951 INFO L226 Difference]: Without dead ends: 131 [2024-12-02 14:09:04,951 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=1888, Unknown=0, NotChecked=0, Total=2070 [2024-12-02 14:09:04,952 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 69 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:04,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 882 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 14:09:04,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-12-02 14:09:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2024-12-02 14:09:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0806451612903225) internal successors, (134), 124 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2024-12-02 14:09:04,956 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 63 [2024-12-02 14:09:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:04,956 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2024-12-02 14:09:04,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2024-12-02 14:09:04,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-12-02 14:09:04,957 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:04,957 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:04,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 14:09:05,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-12-02 14:09:05,158 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:05,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:05,158 INFO L85 PathProgramCache]: Analyzing trace with hash -124681572, now seen corresponding path program 8 times [2024-12-02 14:09:05,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:05,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078754840] [2024-12-02 14:09:05,158 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:09:05,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:05,176 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:09:05,176 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:05,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:05,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078754840] [2024-12-02 14:09:05,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078754840] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:05,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094601194] [2024-12-02 14:09:05,664 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:09:05,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:05,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:05,665 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:05,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 14:09:05,763 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:09:05,763 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:05,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-12-02 14:09:05,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:05,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:06,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 14:09:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:06,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094601194] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:06,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:06,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2024-12-02 14:09:06,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105163359] [2024-12-02 14:09:06,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:06,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-12-02 14:09:06,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:06,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-12-02 14:09:06,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2024-12-02 14:09:06,337 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand has 37 states, 36 states have (on average 3.638888888888889) internal successors, (131), 37 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:06,939 INFO L93 Difference]: Finished difference Result 159 states and 169 transitions. [2024-12-02 14:09:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 14:09:06,939 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.638888888888889) internal successors, (131), 37 states have internal predecessors, (131), 0 states have call successors, (0), 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 [2024-12-02 14:09:06,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:06,940 INFO L225 Difference]: With dead ends: 159 [2024-12-02 14:09:06,940 INFO L226 Difference]: Without dead ends: 159 [2024-12-02 14:09:06,940 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 108 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=284, Invalid=2166, Unknown=0, NotChecked=0, Total=2450 [2024-12-02 14:09:06,940 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 97 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:06,941 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 896 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 14:09:06,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-12-02 14:09:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2024-12-02 14:09:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0820895522388059) internal successors, (145), 134 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 145 transitions. [2024-12-02 14:09:06,943 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 145 transitions. Word has length 67 [2024-12-02 14:09:06,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:06,943 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 145 transitions. [2024-12-02 14:09:06,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.638888888888889) internal successors, (131), 37 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:06,943 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 145 transitions. [2024-12-02 14:09:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-12-02 14:09:06,944 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:06,944 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:06,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 14:09:07,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-12-02 14:09:07,145 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:07,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:07,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1686696030, now seen corresponding path program 9 times [2024-12-02 14:09:07,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:07,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810629959] [2024-12-02 14:09:07,145 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:09:07,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:07,181 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 14:09:07,181 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:07,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:07,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810629959] [2024-12-02 14:09:07,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810629959] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:07,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937709695] [2024-12-02 14:09:07,584 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:09:07,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:07,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:07,586 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:07,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 14:09:07,768 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 14:09:07,768 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:07,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-12-02 14:09:07,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:07,861 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 [2024-12-02 14:09:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:08,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:08,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:09:08,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:09:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:08,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937709695] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:08,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:08,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 40 [2024-12-02 14:09:08,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166586276] [2024-12-02 14:09:08,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:08,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-12-02 14:09:08,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:08,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-12-02 14:09:08,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 14:09:08,300 INFO L87 Difference]: Start difference. First operand 135 states and 145 transitions. Second operand has 40 states, 40 states have (on average 3.375) internal successors, (135), 40 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:08,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:08,847 INFO L93 Difference]: Finished difference Result 235 states and 250 transitions. [2024-12-02 14:09:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-12-02 14:09:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.375) internal successors, (135), 40 states have internal predecessors, (135), 0 states have call successors, (0), 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 72 [2024-12-02 14:09:08,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:08,848 INFO L225 Difference]: With dead ends: 235 [2024-12-02 14:09:08,848 INFO L226 Difference]: Without dead ends: 149 [2024-12-02 14:09:08,848 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=2754, Unknown=0, NotChecked=0, Total=2970 [2024-12-02 14:09:08,849 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 118 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:08,849 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1181 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 14:09:08,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-12-02 14:09:08,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2024-12-02 14:09:08,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0774647887323943) internal successors, (153), 142 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2024-12-02 14:09:08,852 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 72 [2024-12-02 14:09:08,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:08,852 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2024-12-02 14:09:08,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.375) internal successors, (135), 40 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2024-12-02 14:09:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-12-02 14:09:08,853 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:08,853 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:08,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 14:09:09,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-12-02 14:09:09,054 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:09,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:09,054 INFO L85 PathProgramCache]: Analyzing trace with hash -940102885, now seen corresponding path program 10 times [2024-12-02 14:09:09,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:09,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017687865] [2024-12-02 14:09:09,054 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:09:09,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:09,072 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:09:09,072 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:09,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:09,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017687865] [2024-12-02 14:09:09,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017687865] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:09,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316432877] [2024-12-02 14:09:09,344 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:09:09,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:09,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:09,346 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:09,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 14:09:09,448 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:09:09,448 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:09,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-12-02 14:09:09,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 55 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:09,596 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:09,884 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 [2024-12-02 14:09:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 55 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:09,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316432877] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:09,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:09,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2024-12-02 14:09:09,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261114622] [2024-12-02 14:09:09,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:09,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 14:09:09,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:09,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 14:09:09,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2024-12-02 14:09:09,931 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand has 30 states, 29 states have (on average 4.068965517241379) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:10,453 INFO L93 Difference]: Finished difference Result 182 states and 193 transitions. [2024-12-02 14:09:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 14:09:10,453 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.068965517241379) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2024-12-02 14:09:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:10,454 INFO L225 Difference]: With dead ends: 182 [2024-12-02 14:09:10,454 INFO L226 Difference]: Without dead ends: 182 [2024-12-02 14:09:10,454 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 133 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2024-12-02 14:09:10,455 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 110 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:10,455 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 766 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 14:09:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-12-02 14:09:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 153. [2024-12-02 14:09:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0789473684210527) internal successors, (164), 152 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 164 transitions. [2024-12-02 14:09:10,458 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 164 transitions. Word has length 76 [2024-12-02 14:09:10,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:10,458 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 164 transitions. [2024-12-02 14:09:10,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.068965517241379) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 164 transitions. [2024-12-02 14:09:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-12-02 14:09:10,459 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:10,459 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:10,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 14:09:10,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-12-02 14:09:10,660 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:10,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:10,660 INFO L85 PathProgramCache]: Analyzing trace with hash 705814147, now seen corresponding path program 11 times [2024-12-02 14:09:10,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:10,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359511416] [2024-12-02 14:09:10,660 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:09:10,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:10,687 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 14:09:10,687 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:11,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:11,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359511416] [2024-12-02 14:09:11,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359511416] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:11,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368607483] [2024-12-02 14:09:11,111 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:09:11,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:11,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:11,113 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:11,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 14:09:11,264 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 14:09:11,264 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:11,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-12-02 14:09:11,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:11,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:09:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:11,411 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:11,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:09:11,452 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 16 treesize of output 12 [2024-12-02 14:09:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:11,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368607483] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:11,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:11,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 26 [2024-12-02 14:09:11,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823054485] [2024-12-02 14:09:11,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:11,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 14:09:11,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:11,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 14:09:11,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2024-12-02 14:09:11,502 INFO L87 Difference]: Start difference. First operand 153 states and 164 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:11,994 INFO L93 Difference]: Finished difference Result 268 states and 285 transitions. [2024-12-02 14:09:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-12-02 14:09:11,994 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2024-12-02 14:09:11,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:11,995 INFO L225 Difference]: With dead ends: 268 [2024-12-02 14:09:11,995 INFO L226 Difference]: Without dead ends: 167 [2024-12-02 14:09:11,996 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=1439, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 14:09:11,996 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 75 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:11,996 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 1242 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 14:09:11,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-12-02 14:09:11,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2024-12-02 14:09:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.075) internal successors, (172), 160 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 172 transitions. [2024-12-02 14:09:11,999 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 172 transitions. Word has length 81 [2024-12-02 14:09:12,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:12,000 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 172 transitions. [2024-12-02 14:09:12,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:12,000 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 172 transitions. [2024-12-02 14:09:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-12-02 14:09:12,000 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:12,001 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:12,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 14:09:12,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-12-02 14:09:12,201 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:12,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:12,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1127652138, now seen corresponding path program 12 times [2024-12-02 14:09:12,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:12,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66570637] [2024-12-02 14:09:12,202 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:09:12,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:12,228 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-12-02 14:09:12,228 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 55 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:12,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:12,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66570637] [2024-12-02 14:09:12,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66570637] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:12,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971942704] [2024-12-02 14:09:12,677 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:09:12,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:12,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:12,679 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:12,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 14:09:12,905 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-12-02 14:09:12,905 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:12,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-12-02 14:09:12,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:12,917 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 [2024-12-02 14:09:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:09:13,322 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:14,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971942704] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:14,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:14,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 20] total 54 [2024-12-02 14:09:14,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844444178] [2024-12-02 14:09:14,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:14,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-12-02 14:09:14,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:14,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-12-02 14:09:14,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2620, Unknown=0, NotChecked=0, Total=2970 [2024-12-02 14:09:14,133 INFO L87 Difference]: Start difference. First operand 161 states and 172 transitions. Second operand has 55 states, 54 states have (on average 3.962962962962963) internal successors, (214), 55 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:14,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:14,784 INFO L93 Difference]: Finished difference Result 205 states and 217 transitions. [2024-12-02 14:09:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-12-02 14:09:14,784 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.962962962962963) internal successors, (214), 55 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2024-12-02 14:09:14,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:14,784 INFO L225 Difference]: With dead ends: 205 [2024-12-02 14:09:14,785 INFO L226 Difference]: Without dead ends: 205 [2024-12-02 14:09:14,785 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1618 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=722, Invalid=4390, Unknown=0, NotChecked=0, Total=5112 [2024-12-02 14:09:14,786 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 204 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:14,786 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 434 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 14:09:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-12-02 14:09:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 171. [2024-12-02 14:09:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.076470588235294) internal successors, (183), 170 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) [2024-12-02 14:09:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 183 transitions. [2024-12-02 14:09:14,788 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 183 transitions. Word has length 85 [2024-12-02 14:09:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:14,788 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 183 transitions. [2024-12-02 14:09:14,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.962962962962963) internal successors, (214), 55 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 183 transitions. [2024-12-02 14:09:14,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-12-02 14:09:14,789 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:14,789 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:14,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-12-02 14:09:14,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-12-02 14:09:14,990 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:14,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:14,990 INFO L85 PathProgramCache]: Analyzing trace with hash 378609620, now seen corresponding path program 13 times [2024-12-02 14:09:14,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:14,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021864260] [2024-12-02 14:09:14,990 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:09:14,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:09:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:15,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:15,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021864260] [2024-12-02 14:09:15,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021864260] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:15,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140863674] [2024-12-02 14:09:15,613 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:09:15,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:15,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:15,615 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:15,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 14:09:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:09:15,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-12-02 14:09:15,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:15,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:09:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:16,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:16,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:09:16,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:09:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:16,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140863674] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:16,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 41 [2024-12-02 14:09:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272767034] [2024-12-02 14:09:16,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:16,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-12-02 14:09:16,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:16,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-12-02 14:09:16,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2024-12-02 14:09:16,163 INFO L87 Difference]: Start difference. First operand 171 states and 183 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:17,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:17,024 INFO L93 Difference]: Finished difference Result 301 states and 320 transitions. [2024-12-02 14:09:17,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-12-02 14:09:17,025 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 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 90 [2024-12-02 14:09:17,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:17,025 INFO L225 Difference]: With dead ends: 301 [2024-12-02 14:09:17,025 INFO L226 Difference]: Without dead ends: 185 [2024-12-02 14:09:17,026 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2024-12-02 14:09:17,026 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 97 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:17,026 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 2065 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 14:09:17,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-12-02 14:09:17,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 179. [2024-12-02 14:09:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0730337078651686) internal successors, (191), 178 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 191 transitions. [2024-12-02 14:09:17,029 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 191 transitions. Word has length 90 [2024-12-02 14:09:17,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:17,029 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 191 transitions. [2024-12-02 14:09:17,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:17,029 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 191 transitions. [2024-12-02 14:09:17,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-12-02 14:09:17,029 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:17,030 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:17,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-12-02 14:09:17,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-12-02 14:09:17,230 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:17,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:17,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1357426445, now seen corresponding path program 14 times [2024-12-02 14:09:17,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:17,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161313572] [2024-12-02 14:09:17,230 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:09:17,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:17,247 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:09:17,248 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 66 proven. 173 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:17,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:17,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161313572] [2024-12-02 14:09:17,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161313572] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:17,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257571663] [2024-12-02 14:09:17,853 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:09:17,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:17,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:17,855 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:17,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-12-02 14:09:17,979 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:09:17,979 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:17,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-12-02 14:09:17,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 148 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:18,325 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:18,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 14:09:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 148 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:18,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257571663] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:18,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:18,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 48 [2024-12-02 14:09:18,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488529540] [2024-12-02 14:09:18,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:18,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-12-02 14:09:18,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:18,842 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-12-02 14:09:18,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2103, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 14:09:18,842 INFO L87 Difference]: Start difference. First operand 179 states and 191 transitions. Second operand has 49 states, 48 states have (on average 3.8541666666666665) internal successors, (185), 49 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:19,726 INFO L93 Difference]: Finished difference Result 228 states and 241 transitions. [2024-12-02 14:09:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-12-02 14:09:19,726 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.8541666666666665) internal successors, (185), 49 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-12-02 14:09:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:19,727 INFO L225 Difference]: With dead ends: 228 [2024-12-02 14:09:19,727 INFO L226 Difference]: Without dead ends: 228 [2024-12-02 14:09:19,728 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 153 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=483, Invalid=4073, Unknown=0, NotChecked=0, Total=4556 [2024-12-02 14:09:19,728 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 233 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:19,728 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1354 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 14:09:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-12-02 14:09:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 189. [2024-12-02 14:09:19,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.074468085106383) internal successors, (202), 188 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 202 transitions. [2024-12-02 14:09:19,731 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 202 transitions. Word has length 94 [2024-12-02 14:09:19,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:19,731 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 202 transitions. [2024-12-02 14:09:19,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.8541666666666665) internal successors, (185), 49 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 202 transitions. [2024-12-02 14:09:19,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-12-02 14:09:19,732 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:19,732 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:19,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-12-02 14:09:19,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-12-02 14:09:19,933 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:19,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:19,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1215364655, now seen corresponding path program 15 times [2024-12-02 14:09:19,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:19,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143608216] [2024-12-02 14:09:19,933 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:09:19,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:19,969 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-12-02 14:09:19,969 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:20,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:20,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143608216] [2024-12-02 14:09:20,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143608216] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:20,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932063372] [2024-12-02 14:09:20,656 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:09:20,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:20,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:20,658 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:20,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-12-02 14:09:20,877 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-12-02 14:09:20,877 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:20,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-12-02 14:09:20,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:21,012 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 [2024-12-02 14:09:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:21,273 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:21,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:09:21,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:09:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:21,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932063372] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:21,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:21,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 26] total 53 [2024-12-02 14:09:21,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10402746] [2024-12-02 14:09:21,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:21,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-12-02 14:09:21,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:21,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-12-02 14:09:21,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2024-12-02 14:09:21,718 INFO L87 Difference]: Start difference. First operand 189 states and 202 transitions. Second operand has 53 states, 53 states have (on average 3.6037735849056602) internal successors, (191), 53 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:22,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:22,875 INFO L93 Difference]: Finished difference Result 334 states and 355 transitions. [2024-12-02 14:09:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-12-02 14:09:22,875 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.6037735849056602) internal successors, (191), 53 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2024-12-02 14:09:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:22,876 INFO L225 Difference]: With dead ends: 334 [2024-12-02 14:09:22,876 INFO L226 Difference]: Without dead ends: 203 [2024-12-02 14:09:22,876 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=299, Invalid=5251, Unknown=0, NotChecked=0, Total=5550 [2024-12-02 14:09:22,877 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 167 mSDsluCounter, 2801 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 2883 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:22,877 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 2883 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2128 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 14:09:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-12-02 14:09:22,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 197. [2024-12-02 14:09:22,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0714285714285714) internal successors, (210), 196 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 210 transitions. [2024-12-02 14:09:22,879 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 210 transitions. Word has length 99 [2024-12-02 14:09:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:22,879 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 210 transitions. [2024-12-02 14:09:22,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.6037735849056602) internal successors, (191), 53 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 210 transitions. [2024-12-02 14:09:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-12-02 14:09:22,880 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:22,880 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:22,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-12-02 14:09:23,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-12-02 14:09:23,081 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:23,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:23,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1717402952, now seen corresponding path program 16 times [2024-12-02 14:09:23,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:23,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192338087] [2024-12-02 14:09:23,081 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:09:23,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:23,097 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:09:23,097 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 105 proven. 204 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:23,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:23,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192338087] [2024-12-02 14:09:23,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192338087] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:23,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544670704] [2024-12-02 14:09:23,565 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:09:23,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:23,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:23,567 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:23,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-12-02 14:09:23,756 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:09:23,756 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:23,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-12-02 14:09:23,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 136 proven. 173 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:23,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:24,399 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 [2024-12-02 14:09:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 136 proven. 173 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:24,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544670704] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:24,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:24,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2024-12-02 14:09:24,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002441459] [2024-12-02 14:09:24,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:24,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-12-02 14:09:24,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:24,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-12-02 14:09:24,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 14:09:24,473 INFO L87 Difference]: Start difference. First operand 197 states and 210 transitions. Second operand has 39 states, 38 states have (on average 4.2105263157894735) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:25,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:25,370 INFO L93 Difference]: Finished difference Result 251 states and 265 transitions. [2024-12-02 14:09:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-12-02 14:09:25,370 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.2105263157894735) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-12-02 14:09:25,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:25,372 INFO L225 Difference]: With dead ends: 251 [2024-12-02 14:09:25,372 INFO L226 Difference]: Without dead ends: 251 [2024-12-02 14:09:25,372 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 181 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=342, Invalid=2964, Unknown=0, NotChecked=0, Total=3306 [2024-12-02 14:09:25,372 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 176 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:25,373 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 1600 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1617 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 14:09:25,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-12-02 14:09:25,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 207. [2024-12-02 14:09:25,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0728155339805825) internal successors, (221), 206 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 221 transitions. [2024-12-02 14:09:25,376 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 221 transitions. Word has length 103 [2024-12-02 14:09:25,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:25,376 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 221 transitions. [2024-12-02 14:09:25,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.2105263157894735) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:25,376 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 221 transitions. [2024-12-02 14:09:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-12-02 14:09:25,376 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:25,376 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:25,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-12-02 14:09:25,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:25,577 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:25,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:25,577 INFO L85 PathProgramCache]: Analyzing trace with hash 751681798, now seen corresponding path program 17 times [2024-12-02 14:09:25,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:25,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927022929] [2024-12-02 14:09:25,577 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:09:25,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:25,605 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-12-02 14:09:25,605 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:26,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:26,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927022929] [2024-12-02 14:09:26,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927022929] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:26,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825525416] [2024-12-02 14:09:26,375 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:09:26,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:26,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:26,377 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:26,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-12-02 14:09:26,631 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-12-02 14:09:26,631 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:26,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-12-02 14:09:26,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:26,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:09:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:27,099 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:27,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:09:27,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:09:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:27,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825525416] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:27,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:27,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 48 [2024-12-02 14:09:27,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498055177] [2024-12-02 14:09:27,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:27,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-12-02 14:09:27,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:27,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-12-02 14:09:27,277 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2024-12-02 14:09:27,277 INFO L87 Difference]: Start difference. First operand 207 states and 221 transitions. Second operand has 48 states, 48 states have (on average 3.4166666666666665) internal successors, (164), 48 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:28,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:28,505 INFO L93 Difference]: Finished difference Result 367 states and 390 transitions. [2024-12-02 14:09:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-12-02 14:09:28,506 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.4166666666666665) internal successors, (164), 48 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2024-12-02 14:09:28,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:28,507 INFO L225 Difference]: With dead ends: 367 [2024-12-02 14:09:28,507 INFO L226 Difference]: Without dead ends: 221 [2024-12-02 14:09:28,507 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=282, Invalid=4688, Unknown=0, NotChecked=0, Total=4970 [2024-12-02 14:09:28,507 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 190 mSDsluCounter, 2382 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 1939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:28,508 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 2473 Invalid, 1939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1929 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 14:09:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-12-02 14:09:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 215. [2024-12-02 14:09:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0700934579439252) internal successors, (229), 214 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:28,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 229 transitions. [2024-12-02 14:09:28,510 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 229 transitions. Word has length 108 [2024-12-02 14:09:28,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:28,510 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 229 transitions. [2024-12-02 14:09:28,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.4166666666666665) internal successors, (164), 48 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 229 transitions. [2024-12-02 14:09:28,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-12-02 14:09:28,511 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:28,511 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:28,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-12-02 14:09:28,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:28,712 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:28,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash 384783359, now seen corresponding path program 18 times [2024-12-02 14:09:28,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:28,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985633168] [2024-12-02 14:09:28,712 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:09:28,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:28,752 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-12-02 14:09:28,752 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 136 proven. 252 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:29,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:29,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985633168] [2024-12-02 14:09:29,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985633168] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:29,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18963827] [2024-12-02 14:09:29,824 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:09:29,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:29,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:29,826 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:29,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-12-02 14:09:30,212 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-12-02 14:09:30,212 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:30,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-12-02 14:09:30,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 171 proven. 217 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:30,624 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:31,278 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 [2024-12-02 14:09:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 171 proven. 217 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:31,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18963827] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:31,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:31,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 25] total 58 [2024-12-02 14:09:31,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348339433] [2024-12-02 14:09:31,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:31,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-12-02 14:09:31,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:31,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-12-02 14:09:31,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2979, Unknown=0, NotChecked=0, Total=3422 [2024-12-02 14:09:31,514 INFO L87 Difference]: Start difference. First operand 215 states and 229 transitions. Second operand has 59 states, 58 states have (on average 4.0) internal successors, (232), 59 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:32,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:32,473 INFO L93 Difference]: Finished difference Result 274 states and 289 transitions. [2024-12-02 14:09:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-12-02 14:09:32,473 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 4.0) internal successors, (232), 59 states have internal predecessors, (232), 0 states have call successors, (0), 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 112 [2024-12-02 14:09:32,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:32,474 INFO L225 Difference]: With dead ends: 274 [2024-12-02 14:09:32,474 INFO L226 Difference]: Without dead ends: 274 [2024-12-02 14:09:32,475 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 185 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2654 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=957, Invalid=5363, Unknown=0, NotChecked=0, Total=6320 [2024-12-02 14:09:32,475 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 309 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:32,475 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 693 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 14:09:32,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-12-02 14:09:32,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 225. [2024-12-02 14:09:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0714285714285714) internal successors, (240), 224 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 240 transitions. [2024-12-02 14:09:32,478 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 240 transitions. Word has length 112 [2024-12-02 14:09:32,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:32,478 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 240 transitions. [2024-12-02 14:09:32,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 4.0) internal successors, (232), 59 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 240 transitions. [2024-12-02 14:09:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-12-02 14:09:32,479 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:32,479 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:32,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-12-02 14:09:32,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:32,680 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:32,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1023648799, now seen corresponding path program 19 times [2024-12-02 14:09:32,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:32,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617330292] [2024-12-02 14:09:32,680 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:09:32,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:09:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 29 proven. 406 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:33,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:33,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617330292] [2024-12-02 14:09:33,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617330292] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:33,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367854153] [2024-12-02 14:09:33,652 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:09:33,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:33,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:33,654 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:33,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-12-02 14:09:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:09:33,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-12-02 14:09:33,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:34,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:09:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 29 proven. 406 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:34,258 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:34,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:09:34,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:09:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 29 proven. 406 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:34,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367854153] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:34,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:34,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 50 [2024-12-02 14:09:34,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101506632] [2024-12-02 14:09:34,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:34,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-12-02 14:09:34,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:34,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-12-02 14:09:34,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2024-12-02 14:09:34,416 INFO L87 Difference]: Start difference. First operand 225 states and 240 transitions. Second operand has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 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) [2024-12-02 14:09:35,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:35,717 INFO L93 Difference]: Finished difference Result 400 states and 425 transitions. [2024-12-02 14:09:35,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-12-02 14:09:35,717 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2024-12-02 14:09:35,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:35,718 INFO L225 Difference]: With dead ends: 400 [2024-12-02 14:09:35,718 INFO L226 Difference]: Without dead ends: 239 [2024-12-02 14:09:35,718 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=302, Invalid=5398, Unknown=0, NotChecked=0, Total=5700 [2024-12-02 14:09:35,719 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 159 mSDsluCounter, 2894 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:35,719 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 2994 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2258 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 14:09:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-12-02 14:09:35,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 233. [2024-12-02 14:09:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0689655172413792) internal successors, (248), 232 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 248 transitions. [2024-12-02 14:09:35,721 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 248 transitions. Word has length 117 [2024-12-02 14:09:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:35,721 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 248 transitions. [2024-12-02 14:09:35,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 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) [2024-12-02 14:09:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 248 transitions. [2024-12-02 14:09:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-12-02 14:09:35,722 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:35,722 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:35,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-12-02 14:09:35,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:35,922 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:35,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:35,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1510647482, now seen corresponding path program 20 times [2024-12-02 14:09:35,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:35,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781661805] [2024-12-02 14:09:35,923 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:09:35,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:35,945 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:09:35,945 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 153 proven. 323 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:36,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:36,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781661805] [2024-12-02 14:09:36,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781661805] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:36,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879690086] [2024-12-02 14:09:36,879 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:09:36,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:36,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:36,880 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:36,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-12-02 14:09:37,039 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:09:37,039 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:37,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-12-02 14:09:37,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 190 proven. 286 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:37,531 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:38,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 14:09:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 190 proven. 286 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:38,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879690086] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:38,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:38,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 60 [2024-12-02 14:09:38,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180427616] [2024-12-02 14:09:38,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:38,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-12-02 14:09:38,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:38,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-12-02 14:09:38,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=3271, Unknown=0, NotChecked=0, Total=3660 [2024-12-02 14:09:38,360 INFO L87 Difference]: Start difference. First operand 233 states and 248 transitions. Second operand has 61 states, 60 states have (on average 3.9833333333333334) internal successors, (239), 61 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:39,775 INFO L93 Difference]: Finished difference Result 297 states and 313 transitions. [2024-12-02 14:09:39,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-12-02 14:09:39,775 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 3.9833333333333334) internal successors, (239), 61 states have internal predecessors, (239), 0 states have call successors, (0), 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 121 [2024-12-02 14:09:39,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:39,776 INFO L225 Difference]: With dead ends: 297 [2024-12-02 14:09:39,776 INFO L226 Difference]: Without dead ends: 297 [2024-12-02 14:09:39,777 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 198 SyntacticMatches, 12 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2650 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=734, Invalid=6576, Unknown=0, NotChecked=0, Total=7310 [2024-12-02 14:09:39,777 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 355 mSDsluCounter, 2332 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:39,777 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 2428 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 14:09:39,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-12-02 14:09:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 243. [2024-12-02 14:09:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0702479338842976) internal successors, (259), 242 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:39,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 259 transitions. [2024-12-02 14:09:39,779 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 259 transitions. Word has length 121 [2024-12-02 14:09:39,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:39,780 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 259 transitions. [2024-12-02 14:09:39,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 3.9833333333333334) internal successors, (239), 61 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:39,780 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 259 transitions. [2024-12-02 14:09:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-12-02 14:09:39,780 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:39,780 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:39,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-12-02 14:09:39,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:39,981 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:39,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:39,981 INFO L85 PathProgramCache]: Analyzing trace with hash 589353784, now seen corresponding path program 21 times [2024-12-02 14:09:39,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:39,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513231105] [2024-12-02 14:09:39,981 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:09:39,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:40,020 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-12-02 14:09:40,020 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 496 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:41,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:41,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513231105] [2024-12-02 14:09:41,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513231105] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:41,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100280825] [2024-12-02 14:09:41,164 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:09:41,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:41,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:41,166 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:41,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-12-02 14:09:41,596 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-12-02 14:09:41,596 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:41,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-12-02 14:09:41,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:41,807 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 [2024-12-02 14:09:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 496 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:42,334 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:42,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:09:42,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:09:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 496 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:43,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100280825] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:43,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:43,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 32] total 65 [2024-12-02 14:09:43,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803590845] [2024-12-02 14:09:43,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:43,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-12-02 14:09:43,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:43,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-12-02 14:09:43,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3973, Unknown=0, NotChecked=0, Total=4160 [2024-12-02 14:09:43,060 INFO L87 Difference]: Start difference. First operand 243 states and 259 transitions. Second operand has 65 states, 65 states have (on average 3.769230769230769) internal successors, (245), 65 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:44,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:44,938 INFO L93 Difference]: Finished difference Result 433 states and 460 transitions. [2024-12-02 14:09:44,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-12-02 14:09:44,939 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.769230769230769) internal successors, (245), 65 states have internal predecessors, (245), 0 states have call successors, (0), 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 126 [2024-12-02 14:09:44,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:44,939 INFO L225 Difference]: With dead ends: 433 [2024-12-02 14:09:44,939 INFO L226 Difference]: Without dead ends: 257 [2024-12-02 14:09:44,940 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=371, Invalid=8185, Unknown=0, NotChecked=0, Total=8556 [2024-12-02 14:09:44,940 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 250 mSDsluCounter, 3875 mSDsCounter, 0 mSdLazyCounter, 2965 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 3984 SdHoareTripleChecker+Invalid, 2976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:44,940 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 3984 Invalid, 2976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2965 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-12-02 14:09:44,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-12-02 14:09:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 251. [2024-12-02 14:09:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.068) internal successors, (267), 250 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:44,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 267 transitions. [2024-12-02 14:09:44,943 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 267 transitions. Word has length 126 [2024-12-02 14:09:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:44,944 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 267 transitions. [2024-12-02 14:09:44,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.769230769230769) internal successors, (245), 65 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:44,944 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 267 transitions. [2024-12-02 14:09:44,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-12-02 14:09:44,944 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:44,944 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:44,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-12-02 14:09:45,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-12-02 14:09:45,145 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:45,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:45,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1568340465, now seen corresponding path program 22 times [2024-12-02 14:09:45,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:45,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297622204] [2024-12-02 14:09:45,145 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:09:45,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:45,166 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:09:45,167 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 210 proven. 363 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:45,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:45,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297622204] [2024-12-02 14:09:45,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297622204] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:45,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072650003] [2024-12-02 14:09:45,864 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:09:45,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:45,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:45,865 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:45,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-12-02 14:09:46,165 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:09:46,165 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:46,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-12-02 14:09:46,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 253 proven. 320 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:46,398 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:09:47,015 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 [2024-12-02 14:09:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 253 proven. 320 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:47,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072650003] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:09:47,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:09:47,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2024-12-02 14:09:47,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547226879] [2024-12-02 14:09:47,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:09:47,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-12-02 14:09:47,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:09:47,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-12-02 14:09:47,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2024-12-02 14:09:47,131 INFO L87 Difference]: Start difference. First operand 251 states and 267 transitions. Second operand has 48 states, 47 states have (on average 4.297872340425532) internal successors, (202), 48 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:09:48,551 INFO L93 Difference]: Finished difference Result 320 states and 337 transitions. [2024-12-02 14:09:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-12-02 14:09:48,551 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.297872340425532) internal successors, (202), 48 states have internal predecessors, (202), 0 states have call successors, (0), 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 130 [2024-12-02 14:09:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:09:48,552 INFO L225 Difference]: With dead ends: 320 [2024-12-02 14:09:48,552 INFO L226 Difference]: Without dead ends: 320 [2024-12-02 14:09:48,553 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 229 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=516, Invalid=4740, Unknown=0, NotChecked=0, Total=5256 [2024-12-02 14:09:48,553 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 332 mSDsluCounter, 2172 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 2277 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-12-02 14:09:48,553 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 2277 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2368 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-12-02 14:09:48,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-12-02 14:09:48,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 261. [2024-12-02 14:09:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0692307692307692) internal successors, (278), 260 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:48,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 278 transitions. [2024-12-02 14:09:48,556 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 278 transitions. Word has length 130 [2024-12-02 14:09:48,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:09:48,556 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 278 transitions. [2024-12-02 14:09:48,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.297872340425532) internal successors, (202), 48 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:09:48,556 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 278 transitions. [2024-12-02 14:09:48,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-12-02 14:09:48,557 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:09:48,557 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:09:48,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-12-02 14:09:48,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:48,757 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:09:48,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:09:48,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2115246739, now seen corresponding path program 23 times [2024-12-02 14:09:48,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:09:48,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992366906] [2024-12-02 14:09:48,758 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:09:48,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:09:48,791 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-12-02 14:09:48,791 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 35 proven. 595 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:09:49,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:09:49,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992366906] [2024-12-02 14:09:49,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992366906] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:09:49,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675498539] [2024-12-02 14:09:49,840 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:09:49,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:09:49,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:09:49,842 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:09:49,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-12-02 14:09:50,189 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-12-02 14:09:50,189 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:09:50,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-12-02 14:09:50,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:09:50,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 14:09:50,694 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 14 treesize of output 10 [2024-12-02 14:10:07,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 14:10:07,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2024-12-02 14:10:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 231 proven. 384 refuted. 15 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:10:07,928 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:10:10,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:10:10,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:10:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 231 proven. 399 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:10:12,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675498539] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:10:12,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:10:12,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 34, 34] total 103 [2024-12-02 14:10:12,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447531577] [2024-12-02 14:10:12,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:10:12,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-12-02 14:10:12,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:10:12,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-12-02 14:10:12,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=9684, Unknown=3, NotChecked=0, Total=10506 [2024-12-02 14:10:12,302 INFO L87 Difference]: Start difference. First operand 261 states and 278 transitions. Second operand has 103 states, 103 states have (on average 3.737864077669903) internal successors, (385), 103 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:10:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:10:34,892 INFO L93 Difference]: Finished difference Result 531 states and 561 transitions. [2024-12-02 14:10:34,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-12-02 14:10:34,892 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.737864077669903) internal successors, (385), 103 states have internal predecessors, (385), 0 states have call successors, (0), 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 135 [2024-12-02 14:10:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:10:34,893 INFO L225 Difference]: With dead ends: 531 [2024-12-02 14:10:34,893 INFO L226 Difference]: Without dead ends: 340 [2024-12-02 14:10:34,896 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7199 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=1873, Invalid=24856, Unknown=3, NotChecked=0, Total=26732 [2024-12-02 14:10:34,896 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 1091 mSDsluCounter, 3898 mSDsCounter, 0 mSdLazyCounter, 4319 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 4004 SdHoareTripleChecker+Invalid, 4327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4319 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2024-12-02 14:10:34,896 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 4004 Invalid, 4327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4319 Invalid, 8 Unknown, 0 Unchecked, 7.6s Time] [2024-12-02 14:10:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2024-12-02 14:10:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 279. [2024-12-02 14:10:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.0683453237410072) internal successors, (297), 278 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:10:34,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 297 transitions. [2024-12-02 14:10:34,901 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 297 transitions. Word has length 135 [2024-12-02 14:10:34,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:10:34,901 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 297 transitions. [2024-12-02 14:10:34,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.737864077669903) internal successors, (385), 103 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:10:34,901 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 297 transitions. [2024-12-02 14:10:34,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-12-02 14:10:34,902 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:10:34,902 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:10:34,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-12-02 14:10:35,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:10:35,102 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:10:35,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:10:35,103 INFO L85 PathProgramCache]: Analyzing trace with hash 270415466, now seen corresponding path program 24 times [2024-12-02 14:10:35,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:10:35,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686263678] [2024-12-02 14:10:35,103 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:10:35,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:10:35,177 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-12-02 14:10:35,178 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:10:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 38 proven. 703 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:10:37,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:10:37,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686263678] [2024-12-02 14:10:37,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686263678] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:10:37,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406143875] [2024-12-02 14:10:37,114 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:10:37,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:10:37,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:10:37,116 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:10:37,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-12-02 14:10:38,207 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-12-02 14:10:38,207 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:10:38,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 152 conjuncts are in the unsatisfiable core [2024-12-02 14:10:38,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:10:39,157 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 [2024-12-02 14:10:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 38 proven. 703 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:10:39,972 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:10:40,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:10:40,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:10:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 38 proven. 703 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:10:40,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406143875] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:10:40,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:10:40,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 37, 36] total 91 [2024-12-02 14:10:40,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349911948] [2024-12-02 14:10:40,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:10:40,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-12-02 14:10:40,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:10:40,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-12-02 14:10:40,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=7859, Unknown=0, NotChecked=0, Total=8190 [2024-12-02 14:10:40,958 INFO L87 Difference]: Start difference. First operand 279 states and 297 transitions. Second operand has 91 states, 91 states have (on average 3.769230769230769) internal successors, (343), 91 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:10:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:10:44,761 INFO L93 Difference]: Finished difference Result 499 states and 530 transitions. [2024-12-02 14:10:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-12-02 14:10:44,761 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.769230769230769) internal successors, (343), 91 states have internal predecessors, (343), 0 states have call successors, (0), 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 144 [2024-12-02 14:10:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:10:44,762 INFO L225 Difference]: With dead ends: 499 [2024-12-02 14:10:44,762 INFO L226 Difference]: Without dead ends: 293 [2024-12-02 14:10:44,764 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4936 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=615, Invalid=15135, Unknown=0, NotChecked=0, Total=15750 [2024-12-02 14:10:44,764 INFO L435 NwaCegarLoop]: 125 mSDtfsCounter, 306 mSDsluCounter, 7006 mSDsCounter, 0 mSdLazyCounter, 5682 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 7131 SdHoareTripleChecker+Invalid, 5695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 5682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:10:44,764 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 7131 Invalid, 5695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 5682 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-12-02 14:10:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-12-02 14:10:44,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 287. [2024-12-02 14:10:44,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.0664335664335665) internal successors, (305), 286 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:10:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 305 transitions. [2024-12-02 14:10:44,767 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 305 transitions. Word has length 144 [2024-12-02 14:10:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:10:44,767 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 305 transitions. [2024-12-02 14:10:44,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.769230769230769) internal successors, (343), 91 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:10:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 305 transitions. [2024-12-02 14:10:44,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-12-02 14:10:44,768 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:10:44,768 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:10:44,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-12-02 14:10:44,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-12-02 14:10:44,969 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:10:44,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:10:44,969 INFO L85 PathProgramCache]: Analyzing trace with hash 312180963, now seen corresponding path program 25 times [2024-12-02 14:10:44,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:10:44,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408985934] [2024-12-02 14:10:44,970 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:10:44,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:10:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:10:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 300 proven. 494 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:10:46,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:10:46,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408985934] [2024-12-02 14:10:46,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408985934] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:10:46,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856743810] [2024-12-02 14:10:46,445 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:10:46,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:10:46,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:10:46,447 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:10:46,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-12-02 14:10:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:10:46,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-12-02 14:10:46,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:10:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 351 proven. 443 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:10:47,347 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:10:48,288 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 [2024-12-02 14:10:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 351 proven. 443 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:10:48,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856743810] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:10:48,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:10:48,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 71 [2024-12-02 14:10:48,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84104177] [2024-12-02 14:10:48,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:10:48,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-12-02 14:10:48,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:10:48,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-12-02 14:10:48,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=4546, Unknown=0, NotChecked=0, Total=5112 [2024-12-02 14:10:48,694 INFO L87 Difference]: Start difference. First operand 287 states and 305 transitions. Second operand has 72 states, 71 states have (on average 4.197183098591549) internal successors, (298), 72 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:10:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:10:50,827 INFO L93 Difference]: Finished difference Result 366 states and 385 transitions. [2024-12-02 14:10:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-12-02 14:10:50,827 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 4.197183098591549) internal successors, (298), 72 states have internal predecessors, (298), 0 states have call successors, (0), 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 148 [2024-12-02 14:10:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:10:50,828 INFO L225 Difference]: With dead ends: 366 [2024-12-02 14:10:50,828 INFO L226 Difference]: Without dead ends: 366 [2024-12-02 14:10:50,829 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 245 SyntacticMatches, 14 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3872 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=997, Invalid=9103, Unknown=0, NotChecked=0, Total=10100 [2024-12-02 14:10:50,829 INFO L435 NwaCegarLoop]: 120 mSDtfsCounter, 431 mSDsluCounter, 3064 mSDsCounter, 0 mSdLazyCounter, 3044 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 3184 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:10:50,830 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 3184 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3044 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-12-02 14:10:50,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2024-12-02 14:10:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 297. [2024-12-02 14:10:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.0675675675675675) internal successors, (316), 296 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:10:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 316 transitions. [2024-12-02 14:10:50,832 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 316 transitions. Word has length 148 [2024-12-02 14:10:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:10:50,833 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 316 transitions. [2024-12-02 14:10:50,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 4.197183098591549) internal successors, (298), 72 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:10:50,833 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 316 transitions. [2024-12-02 14:10:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-12-02 14:10:50,833 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:10:50,833 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:10:50,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-12-02 14:10:51,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-12-02 14:10:51,034 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:10:51,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:10:51,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1193534907, now seen corresponding path program 26 times [2024-12-02 14:10:51,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:10:51,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235534950] [2024-12-02 14:10:51,034 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:10:51,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:10:51,086 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:10:51,086 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:10:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 41 proven. 820 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:10:52,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:10:52,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235534950] [2024-12-02 14:10:52,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235534950] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:10:52,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817932964] [2024-12-02 14:10:52,388 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:10:52,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:10:52,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:10:52,389 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:10:52,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-12-02 14:10:52,587 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:10:52,587 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:10:52,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-12-02 14:10:52,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:10:53,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:10:55,023 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 14:10:55,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 14:10:55,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2024-12-02 14:10:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 41 proven. 820 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:10:55,030 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:10:55,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:10:55,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-12-02 14:10:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 41 proven. 820 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:10:57,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817932964] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:10:57,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:10:57,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 97 [2024-12-02 14:10:57,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326267755] [2024-12-02 14:10:57,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:10:57,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-12-02 14:10:57,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:10:57,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-12-02 14:10:57,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=8959, Unknown=0, NotChecked=0, Total=9312 [2024-12-02 14:10:57,006 INFO L87 Difference]: Start difference. First operand 297 states and 316 transitions. Second operand has 97 states, 97 states have (on average 3.6907216494845363) internal successors, (358), 97 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:11:00,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:11:00,537 INFO L93 Difference]: Finished difference Result 532 states and 565 transitions. [2024-12-02 14:11:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-12-02 14:11:00,538 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.6907216494845363) internal successors, (358), 97 states have internal predecessors, (358), 0 states have call successors, (0), 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 153 [2024-12-02 14:11:00,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:11:00,539 INFO L225 Difference]: With dead ends: 532 [2024-12-02 14:11:00,539 INFO L226 Difference]: Without dead ends: 311 [2024-12-02 14:11:00,540 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5493 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=622, Invalid=16148, Unknown=0, NotChecked=0, Total=16770 [2024-12-02 14:11:00,540 INFO L435 NwaCegarLoop]: 136 mSDtfsCounter, 327 mSDsluCounter, 5522 mSDsCounter, 0 mSdLazyCounter, 4645 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 5658 SdHoareTripleChecker+Invalid, 4660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 4645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:11:00,540 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 5658 Invalid, 4660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 4645 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-12-02 14:11:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-12-02 14:11:00,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 305. [2024-12-02 14:11:00,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.0657894736842106) internal successors, (324), 304 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:11:00,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 324 transitions. [2024-12-02 14:11:00,543 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 324 transitions. Word has length 153 [2024-12-02 14:11:00,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:11:00,543 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 324 transitions. [2024-12-02 14:11:00,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.6907216494845363) internal successors, (358), 97 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:11:00,543 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 324 transitions. [2024-12-02 14:11:00,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-12-02 14:11:00,543 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:11:00,544 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:11:00,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-12-02 14:11:00,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:11:00,744 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:11:00,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:11:00,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1924158306, now seen corresponding path program 27 times [2024-12-02 14:11:00,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:11:00,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638548444] [2024-12-02 14:11:00,745 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:11:00,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:11:00,801 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-12-02 14:11:00,801 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:11:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 399 proven. 483 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-12-02 14:11:02,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:11:02,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638548444] [2024-12-02 14:11:02,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638548444] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:11:02,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225307923] [2024-12-02 14:11:02,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:11:02,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:11:02,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:11:02,968 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:11:02,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-12-02 14:11:04,057 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-12-02 14:11:04,057 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:11:04,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 154 conjuncts are in the unsatisfiable core [2024-12-02 14:11:04,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:11:04,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 14:11:04,934 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 14 treesize of output 10 [2024-12-02 14:11:10,694 INFO L349 Elim1Store]: treesize reduction 12, result has 72.7 percent of original size [2024-12-02 14:11:10,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 50 [2024-12-02 14:11:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 389 proven. 493 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-12-02 14:11:11,134 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:11:51,702 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 61 treesize of output 53 [2024-12-02 14:11:51,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2024-12-02 14:11:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 162 proven. 720 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-12-02 14:11:54,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225307923] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:11:54,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:11:54,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 46, 46] total 129 [2024-12-02 14:11:54,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910320780] [2024-12-02 14:11:54,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:11:54,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2024-12-02 14:11:54,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:11:54,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2024-12-02 14:11:54,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1148, Invalid=15618, Unknown=4, NotChecked=0, Total=16770 [2024-12-02 14:11:54,538 INFO L87 Difference]: Start difference. First operand 305 states and 324 transitions. Second operand has 130 states, 129 states have (on average 3.1705426356589146) internal successors, (409), 130 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:14:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:14:31,183 INFO L93 Difference]: Finished difference Result 410 states and 433 transitions. [2024-12-02 14:14:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2024-12-02 14:14:31,183 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 129 states have (on average 3.1705426356589146) internal successors, (409), 130 states have internal predecessors, (409), 0 states have call successors, (0), 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 157 [2024-12-02 14:14:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:14:31,184 INFO L225 Difference]: With dead ends: 410 [2024-12-02 14:14:31,184 INFO L226 Difference]: Without dead ends: 410 [2024-12-02 14:14:31,186 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18136 ImplicationChecksByTransitivity, 201.4s TimeCoverageRelationStatistics Valid=7617, Invalid=55617, Unknown=18, NotChecked=0, Total=63252 [2024-12-02 14:14:31,186 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 908 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 2802 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:14:31,187 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1221 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2802 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-12-02 14:14:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2024-12-02 14:14:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 345. [2024-12-02 14:14:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.069767441860465) internal successors, (368), 344 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:14:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 368 transitions. [2024-12-02 14:14:31,190 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 368 transitions. Word has length 157 [2024-12-02 14:14:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:14:31,190 INFO L471 AbstractCegarLoop]: Abstraction has 345 states and 368 transitions. [2024-12-02 14:14:31,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 129 states have (on average 3.1705426356589146) internal successors, (409), 130 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:14:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 368 transitions. [2024-12-02 14:14:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2024-12-02 14:14:31,191 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:14:31,191 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 15, 15, 15, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:14:31,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-12-02 14:14:31,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-12-02 14:14:31,392 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:14:31,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:14:31,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1649218590, now seen corresponding path program 28 times [2024-12-02 14:14:31,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:14:31,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47961055] [2024-12-02 14:14:31,392 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:14:31,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:14:31,431 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:14:31,431 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:14:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 266 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-12-02 14:14:32,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:14:32,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47961055] [2024-12-02 14:14:32,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47961055] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:14:32,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686486889] [2024-12-02 14:14:32,788 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:14:32,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:14:32,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:14:32,790 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:14:32,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-12-02 14:14:33,001 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:14:33,001 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:14:33,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 176 conjuncts are in the unsatisfiable core [2024-12-02 14:14:33,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:14:33,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:14:33,328 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 7 treesize of output 3 [2024-12-02 14:14:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 266 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-12-02 14:14:33,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:14:33,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:14:33,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:14:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 266 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-12-02 14:14:33,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686486889] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:14:33,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:14:33,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 45 [2024-12-02 14:14:33,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905631242] [2024-12-02 14:14:33,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:14:33,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-12-02 14:14:33,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:14:33,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-12-02 14:14:33,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1876, Unknown=0, NotChecked=0, Total=1980 [2024-12-02 14:14:33,570 INFO L87 Difference]: Start difference. First operand 345 states and 368 transitions. Second operand has 45 states, 45 states have (on average 3.8444444444444446) internal successors, (173), 45 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:14:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:14:35,997 INFO L93 Difference]: Finished difference Result 595 states and 633 transitions. [2024-12-02 14:14:35,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-12-02 14:14:35,998 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.8444444444444446) internal successors, (173), 45 states have internal predecessors, (173), 0 states have call successors, (0), 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 177 [2024-12-02 14:14:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:14:35,998 INFO L225 Difference]: With dead ends: 595 [2024-12-02 14:14:35,998 INFO L226 Difference]: Without dead ends: 359 [2024-12-02 14:14:35,999 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=233, Invalid=5619, Unknown=0, NotChecked=0, Total=5852 [2024-12-02 14:14:35,999 INFO L435 NwaCegarLoop]: 145 mSDtfsCounter, 192 mSDsluCounter, 5359 mSDsCounter, 0 mSdLazyCounter, 3966 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 5504 SdHoareTripleChecker+Invalid, 3981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-12-02 14:14:35,999 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 5504 Invalid, 3981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3966 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-12-02 14:14:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2024-12-02 14:14:36,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 353. [2024-12-02 14:14:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.0681818181818181) internal successors, (376), 352 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:14:36,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 376 transitions. [2024-12-02 14:14:36,002 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 376 transitions. Word has length 177 [2024-12-02 14:14:36,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:14:36,002 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 376 transitions. [2024-12-02 14:14:36,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.8444444444444446) internal successors, (173), 45 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:14:36,002 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 376 transitions. [2024-12-02 14:14:36,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-12-02 14:14:36,002 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:14:36,002 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 16, 16, 16, 16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:14:36,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-12-02 14:14:36,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:14:36,203 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:14:36,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:14:36,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1316318071, now seen corresponding path program 29 times [2024-12-02 14:14:36,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:14:36,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776998990] [2024-12-02 14:14:36,203 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:14:36,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:14:36,251 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2024-12-02 14:14:36,251 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:14:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1297 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:14:39,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:14:39,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776998990] [2024-12-02 14:14:39,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776998990] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:14:39,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566780696] [2024-12-02 14:14:39,236 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:14:39,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:14:39,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:14:39,238 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:14:39,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-12-02 14:14:39,751 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2024-12-02 14:14:39,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:14:39,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 188 conjuncts are in the unsatisfiable core [2024-12-02 14:14:39,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:14:40,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:14:42,253 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 7 treesize of output 3 [2024-12-02 14:14:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 205 proven. 1081 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-12-02 14:14:42,418 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:14:42,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:14:42,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:14:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 205 proven. 1081 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-12-02 14:14:42,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566780696] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:14:42,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:14:42,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 42, 42] total 92 [2024-12-02 14:14:42,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638031997] [2024-12-02 14:14:42,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:14:42,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-12-02 14:14:42,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:14:42,881 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-12-02 14:14:42,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=8156, Unknown=0, NotChecked=0, Total=8372 [2024-12-02 14:14:42,882 INFO L87 Difference]: Start difference. First operand 353 states and 376 transitions. Second operand has 92 states, 92 states have (on average 3.8043478260869565) internal successors, (350), 92 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:14:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:14:52,723 INFO L93 Difference]: Finished difference Result 623 states and 662 transitions. [2024-12-02 14:14:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-12-02 14:14:52,723 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.8043478260869565) internal successors, (350), 92 states have internal predecessors, (350), 0 states have call successors, (0), 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 181 [2024-12-02 14:14:52,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:14:52,724 INFO L225 Difference]: With dead ends: 623 [2024-12-02 14:14:52,724 INFO L226 Difference]: Without dead ends: 367 [2024-12-02 14:14:52,725 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4199 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=920, Invalid=22336, Unknown=0, NotChecked=0, Total=23256 [2024-12-02 14:14:52,725 INFO L435 NwaCegarLoop]: 139 mSDtfsCounter, 397 mSDsluCounter, 8440 mSDsCounter, 0 mSdLazyCounter, 8718 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 8579 SdHoareTripleChecker+Invalid, 8765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 8718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:14:52,726 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 8579 Invalid, 8765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 8718 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-12-02 14:14:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2024-12-02 14:14:52,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 361. [2024-12-02 14:14:52,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.0666666666666667) internal successors, (384), 360 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:14:52,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 384 transitions. [2024-12-02 14:14:52,730 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 384 transitions. Word has length 181 [2024-12-02 14:14:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:14:52,730 INFO L471 AbstractCegarLoop]: Abstraction has 361 states and 384 transitions. [2024-12-02 14:14:52,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.8043478260869565) internal successors, (350), 92 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:14:52,730 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 384 transitions. [2024-12-02 14:14:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2024-12-02 14:14:52,731 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:14:52,731 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 17, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:14:52,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-12-02 14:14:52,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:14:52,932 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:14:52,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:14:52,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1249874352, now seen corresponding path program 30 times [2024-12-02 14:14:52,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:14:52,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917546431] [2024-12-02 14:14:52,932 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:14:52,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:14:53,002 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-12-02 14:14:53,002 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:14:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 736 proven. 626 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:14:55,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:14:55,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917546431] [2024-12-02 14:14:55,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917546431] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:14:55,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616282284] [2024-12-02 14:14:55,051 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:14:55,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:14:55,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:14:55,052 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:14:55,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-12-02 14:14:56,838 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-12-02 14:14:56,838 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:14:56,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 194 conjuncts are in the unsatisfiable core [2024-12-02 14:14:56,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:14:57,658 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 [2024-12-02 14:14:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 134 proven. 1225 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 14:14:58,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:14:59,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:14:59,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:15:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 134 proven. 1225 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 14:15:01,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616282284] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:15:01,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:15:01,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 44] total 131 [2024-12-02 14:15:01,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932537115] [2024-12-02 14:15:01,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:15:01,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-12-02 14:15:01,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:15:01,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-12-02 14:15:01,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=722, Invalid=16308, Unknown=0, NotChecked=0, Total=17030 [2024-12-02 14:15:01,129 INFO L87 Difference]: Start difference. First operand 361 states and 384 transitions. Second operand has 131 states, 131 states have (on average 3.9618320610687023) internal successors, (519), 131 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:15:10,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:15:10,051 INFO L93 Difference]: Finished difference Result 646 states and 686 transitions. [2024-12-02 14:15:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-12-02 14:15:10,052 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.9618320610687023) internal successors, (519), 131 states have internal predecessors, (519), 0 states have call successors, (0), 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 185 [2024-12-02 14:15:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:15:10,053 INFO L225 Difference]: With dead ends: 646 [2024-12-02 14:15:10,053 INFO L226 Difference]: Without dead ends: 375 [2024-12-02 14:15:10,054 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13765 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=2030, Invalid=39790, Unknown=0, NotChecked=0, Total=41820 [2024-12-02 14:15:10,055 INFO L435 NwaCegarLoop]: 146 mSDtfsCounter, 800 mSDsluCounter, 10047 mSDsCounter, 0 mSdLazyCounter, 9680 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 10193 SdHoareTripleChecker+Invalid, 9697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 9680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:15:10,055 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 10193 Invalid, 9697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 9680 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-12-02 14:15:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-12-02 14:15:10,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 369. [2024-12-02 14:15:10,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.065217391304348) internal successors, (392), 368 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:15:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 392 transitions. [2024-12-02 14:15:10,057 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 392 transitions. Word has length 185 [2024-12-02 14:15:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:15:10,058 INFO L471 AbstractCegarLoop]: Abstraction has 369 states and 392 transitions. [2024-12-02 14:15:10,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.9618320610687023) internal successors, (519), 131 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:15:10,058 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 392 transitions. [2024-12-02 14:15:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2024-12-02 14:15:10,058 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:15:10,058 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:15:10,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-12-02 14:15:10,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-12-02 14:15:10,259 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:15:10,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:15:10,259 INFO L85 PathProgramCache]: Analyzing trace with hash 953394007, now seen corresponding path program 31 times [2024-12-02 14:15:10,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:15:10,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467162187] [2024-12-02 14:15:10,259 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:15:10,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:15:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:15:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 53 proven. 1378 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:15:12,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:15:12,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467162187] [2024-12-02 14:15:12,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467162187] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:15:12,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702790045] [2024-12-02 14:15:12,331 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:15:12,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:15:12,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:15:12,332 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:15:12,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-12-02 14:15:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:15:12,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 200 conjuncts are in the unsatisfiable core [2024-12-02 14:15:12,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:15:13,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:15:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 53 proven. 1378 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:15:13,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:15:13,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:15:13,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:15:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 53 proven. 1378 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:15:14,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702790045] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:15:14,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:15:14,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 46, 46] total 74 [2024-12-02 14:15:14,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079841458] [2024-12-02 14:15:14,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:15:14,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-12-02 14:15:14,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:15:14,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-12-02 14:15:14,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=5196, Unknown=0, NotChecked=0, Total=5402 [2024-12-02 14:15:14,089 INFO L87 Difference]: Start difference. First operand 369 states and 392 transitions. Second operand has 74 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 74 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:15:18,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:15:18,305 INFO L93 Difference]: Finished difference Result 664 states and 705 transitions. [2024-12-02 14:15:18,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-12-02 14:15:18,305 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 74 states have internal predecessors, (281), 0 states have call successors, (0), 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 189 [2024-12-02 14:15:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:15:18,306 INFO L225 Difference]: With dead ends: 664 [2024-12-02 14:15:18,306 INFO L226 Difference]: Without dead ends: 383 [2024-12-02 14:15:18,307 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2933 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=462, Invalid=12878, Unknown=0, NotChecked=0, Total=13340 [2024-12-02 14:15:18,307 INFO L435 NwaCegarLoop]: 172 mSDtfsCounter, 353 mSDsluCounter, 8106 mSDsCounter, 0 mSdLazyCounter, 6256 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 8278 SdHoareTripleChecker+Invalid, 6274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 6256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-12-02 14:15:18,308 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 8278 Invalid, 6274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 6256 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-12-02 14:15:18,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-12-02 14:15:18,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 377. [2024-12-02 14:15:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.0638297872340425) internal successors, (400), 376 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:15:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 400 transitions. [2024-12-02 14:15:18,311 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 400 transitions. Word has length 189 [2024-12-02 14:15:18,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:15:18,311 INFO L471 AbstractCegarLoop]: Abstraction has 377 states and 400 transitions. [2024-12-02 14:15:18,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 74 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:15:18,312 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 400 transitions. [2024-12-02 14:15:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2024-12-02 14:15:18,313 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:15:18,313 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:15:18,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-12-02 14:15:18,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-12-02 14:15:18,513 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:15:18,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:15:18,514 INFO L85 PathProgramCache]: Analyzing trace with hash -706180738, now seen corresponding path program 32 times [2024-12-02 14:15:18,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:15:18,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709364688] [2024-12-02 14:15:18,514 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:15:18,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:15:18,553 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:15:18,553 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:15:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 561 proven. 943 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:15:20,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:15:20,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709364688] [2024-12-02 14:15:20,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709364688] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:15:20,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340987503] [2024-12-02 14:15:20,893 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:15:20,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:15:20,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:15:20,895 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:15:20,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-12-02 14:15:21,161 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:15:21,161 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:15:21,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 181 conjuncts are in the unsatisfiable core [2024-12-02 14:15:21,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:15:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 630 proven. 874 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:15:22,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:15:24,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 14:15:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 630 proven. 874 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:15:24,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340987503] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:15:24,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:15:24,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 92 [2024-12-02 14:15:24,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24617485] [2024-12-02 14:15:24,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:15:24,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-12-02 14:15:24,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:15:24,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-12-02 14:15:24,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=941, Invalid=7615, Unknown=0, NotChecked=0, Total=8556 [2024-12-02 14:15:24,897 INFO L87 Difference]: Start difference. First operand 377 states and 400 transitions. Second operand has 93 states, 92 states have (on average 4.163043478260869) internal successors, (383), 93 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:15:28,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:15:28,872 INFO L93 Difference]: Finished difference Result 481 states and 505 transitions. [2024-12-02 14:15:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-12-02 14:15:28,873 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 4.163043478260869) internal successors, (383), 93 states have internal predecessors, (383), 0 states have call successors, (0), 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 193 [2024-12-02 14:15:28,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:15:28,874 INFO L225 Difference]: With dead ends: 481 [2024-12-02 14:15:28,874 INFO L226 Difference]: Without dead ends: 481 [2024-12-02 14:15:28,874 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 318 SyntacticMatches, 20 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6978 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1670, Invalid=16152, Unknown=0, NotChecked=0, Total=17822 [2024-12-02 14:15:28,875 INFO L435 NwaCegarLoop]: 160 mSDtfsCounter, 849 mSDsluCounter, 5281 mSDsCounter, 0 mSdLazyCounter, 5126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 5441 SdHoareTripleChecker+Invalid, 5128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:15:28,875 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 5441 Invalid, 5128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5126 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-12-02 14:15:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-12-02 14:15:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 387. [2024-12-02 14:15:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0647668393782384) internal successors, (411), 386 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:15:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 411 transitions. [2024-12-02 14:15:28,879 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 411 transitions. Word has length 193 [2024-12-02 14:15:28,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:15:28,879 INFO L471 AbstractCegarLoop]: Abstraction has 387 states and 411 transitions. [2024-12-02 14:15:28,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 4.163043478260869) internal successors, (383), 93 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:15:28,879 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 411 transitions. [2024-12-02 14:15:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2024-12-02 14:15:28,881 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:15:28,881 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:15:28,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-12-02 14:15:29,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-12-02 14:15:29,081 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:15:29,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:15:29,082 INFO L85 PathProgramCache]: Analyzing trace with hash 993723904, now seen corresponding path program 33 times [2024-12-02 14:15:29,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:15:29,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872839254] [2024-12-02 14:15:29,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:15:29,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:15:29,154 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-12-02 14:15:29,154 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:15:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 561 proven. 1035 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:15:32,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:15:32,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872839254] [2024-12-02 14:15:32,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872839254] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:15:32,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944483749] [2024-12-02 14:15:32,235 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:15:32,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:15:32,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:15:32,236 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:15:32,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-12-02 14:15:34,111 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-12-02 14:15:34,111 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:15:34,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 214 conjuncts are in the unsatisfiable core [2024-12-02 14:15:34,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:15:35,481 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 [2024-12-02 14:15:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 56 proven. 1540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:15:37,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:15:39,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:15:39,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:15:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 56 proven. 1540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:15:40,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944483749] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:15:40,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:15:40,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 49, 48] total 143 [2024-12-02 14:15:40,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341959242] [2024-12-02 14:15:40,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:15:40,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2024-12-02 14:15:40,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:15:40,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2024-12-02 14:15:40,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=19357, Unknown=0, NotChecked=0, Total=20306 [2024-12-02 14:15:40,971 INFO L87 Difference]: Start difference. First operand 387 states and 411 transitions. Second operand has 143 states, 143 states have (on average 3.909090909090909) internal successors, (559), 143 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:15:57,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:15:57,607 INFO L93 Difference]: Finished difference Result 797 states and 841 transitions. [2024-12-02 14:15:57,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-12-02 14:15:57,608 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 3.909090909090909) internal successors, (559), 143 states have internal predecessors, (559), 0 states have call successors, (0), 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 198 [2024-12-02 14:15:57,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:15:57,609 INFO L225 Difference]: With dead ends: 797 [2024-12-02 14:15:57,609 INFO L226 Difference]: Without dead ends: 501 [2024-12-02 14:15:57,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16451 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=4124, Invalid=57132, Unknown=0, NotChecked=0, Total=61256 [2024-12-02 14:15:57,611 INFO L435 NwaCegarLoop]: 161 mSDtfsCounter, 1184 mSDsluCounter, 10874 mSDsCounter, 0 mSdLazyCounter, 10807 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 11035 SdHoareTripleChecker+Invalid, 10862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 10807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-12-02 14:15:57,611 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1184 Valid, 11035 Invalid, 10862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 10807 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-12-02 14:15:57,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2024-12-02 14:15:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 405. [2024-12-02 14:15:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.0643564356435644) internal successors, (430), 404 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:15:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 430 transitions. [2024-12-02 14:15:57,614 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 430 transitions. Word has length 198 [2024-12-02 14:15:57,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:15:57,614 INFO L471 AbstractCegarLoop]: Abstraction has 405 states and 430 transitions. [2024-12-02 14:15:57,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 3.909090909090909) internal successors, (559), 143 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:15:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 430 transitions. [2024-12-02 14:15:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2024-12-02 14:15:57,616 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:15:57,616 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:15:57,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-12-02 14:15:57,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-12-02 14:15:57,816 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:15:57,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:15:57,817 INFO L85 PathProgramCache]: Analyzing trace with hash -874274651, now seen corresponding path program 34 times [2024-12-02 14:15:57,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:15:57,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946175839] [2024-12-02 14:15:57,817 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:15:57,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:15:57,880 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:15:57,880 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:16:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 684 proven. 1086 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:00,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:16:00,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946175839] [2024-12-02 14:16:00,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946175839] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:16:00,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883473425] [2024-12-02 14:16:00,875 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:16:00,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:16:00,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:16:00,876 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:16:00,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-12-02 14:16:01,177 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:16:01,177 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:16:01,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 218 conjuncts are in the unsatisfiable core [2024-12-02 14:16:01,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:16:02,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:16:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 59 proven. 1711 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:04,459 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:16:04,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:16:04,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:16:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 59 proven. 1711 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:04,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883473425] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:16:04,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:16:04,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 50, 50] total 103 [2024-12-02 14:16:04,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317341701] [2024-12-02 14:16:04,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:16:04,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-12-02 14:16:04,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:16:04,886 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-12-02 14:16:04,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=9868, Unknown=0, NotChecked=0, Total=10506 [2024-12-02 14:16:04,887 INFO L87 Difference]: Start difference. First operand 405 states and 430 transitions. Second operand has 103 states, 103 states have (on average 3.854368932038835) internal successors, (397), 103 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:16:15,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:16:15,242 INFO L93 Difference]: Finished difference Result 835 states and 881 transitions. [2024-12-02 14:16:15,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2024-12-02 14:16:15,242 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.854368932038835) internal successors, (397), 103 states have internal predecessors, (397), 0 states have call successors, (0), 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 207 [2024-12-02 14:16:15,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:16:15,243 INFO L225 Difference]: With dead ends: 835 [2024-12-02 14:16:15,244 INFO L226 Difference]: Without dead ends: 524 [2024-12-02 14:16:15,245 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7906 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1368, Invalid=31212, Unknown=0, NotChecked=0, Total=32580 [2024-12-02 14:16:15,245 INFO L435 NwaCegarLoop]: 170 mSDtfsCounter, 698 mSDsluCounter, 10519 mSDsCounter, 0 mSdLazyCounter, 10831 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 10689 SdHoareTripleChecker+Invalid, 10850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 10831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-12-02 14:16:15,245 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 10689 Invalid, 10850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 10831 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2024-12-02 14:16:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-12-02 14:16:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 423. [2024-12-02 14:16:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.0639810426540284) internal successors, (449), 422 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:16:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 449 transitions. [2024-12-02 14:16:15,251 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 449 transitions. Word has length 207 [2024-12-02 14:16:15,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:16:15,251 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 449 transitions. [2024-12-02 14:16:15,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.854368932038835) internal successors, (397), 103 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:16:15,251 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 449 transitions. [2024-12-02 14:16:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-12-02 14:16:15,252 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:16:15,252 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:16:15,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-12-02 14:16:15,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-12-02 14:16:15,453 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:16:15,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:16:15,453 INFO L85 PathProgramCache]: Analyzing trace with hash 52981042, now seen corresponding path program 35 times [2024-12-02 14:16:15,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:16:15,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829424345] [2024-12-02 14:16:15,453 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:16:15,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:16:15,535 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2024-12-02 14:16:15,535 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:16:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1959 backedges. 62 proven. 1891 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:18,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:16:18,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829424345] [2024-12-02 14:16:18,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829424345] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:16:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921875099] [2024-12-02 14:16:18,215 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:16:18,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:16:18,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:16:18,216 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:16:18,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-12-02 14:16:19,174 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2024-12-02 14:16:19,174 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:16:19,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 228 conjuncts are in the unsatisfiable core [2024-12-02 14:16:19,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:16:20,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:16:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1959 backedges. 62 proven. 1891 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:20,590 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:16:20,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:16:20,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:16:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1959 backedges. 62 proven. 1891 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:20,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921875099] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:16:20,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:16:20,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 52, 52] total 86 [2024-12-02 14:16:20,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418369957] [2024-12-02 14:16:20,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:16:20,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-12-02 14:16:20,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:16:20,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-12-02 14:16:20,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=7067, Unknown=0, NotChecked=0, Total=7310 [2024-12-02 14:16:20,957 INFO L87 Difference]: Start difference. First operand 423 states and 449 transitions. Second operand has 86 states, 86 states have (on average 3.7674418604651163) internal successors, (324), 86 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:16:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:16:26,271 INFO L93 Difference]: Finished difference Result 763 states and 810 transitions. [2024-12-02 14:16:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-12-02 14:16:26,271 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.7674418604651163) internal successors, (324), 86 states have internal predecessors, (324), 0 states have call successors, (0), 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 216 [2024-12-02 14:16:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:16:26,272 INFO L225 Difference]: With dead ends: 763 [2024-12-02 14:16:26,272 INFO L226 Difference]: Without dead ends: 437 [2024-12-02 14:16:26,273 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4071 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=533, Invalid=17289, Unknown=0, NotChecked=0, Total=17822 [2024-12-02 14:16:26,274 INFO L435 NwaCegarLoop]: 199 mSDtfsCounter, 287 mSDsluCounter, 9908 mSDsCounter, 0 mSdLazyCounter, 7888 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 10107 SdHoareTripleChecker+Invalid, 7910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 7888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:16:26,274 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 10107 Invalid, 7910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 7888 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-12-02 14:16:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2024-12-02 14:16:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 431. [2024-12-02 14:16:26,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 1.0627906976744186) internal successors, (457), 430 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:16:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 457 transitions. [2024-12-02 14:16:26,276 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 457 transitions. Word has length 216 [2024-12-02 14:16:26,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:16:26,277 INFO L471 AbstractCegarLoop]: Abstraction has 431 states and 457 transitions. [2024-12-02 14:16:26,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.7674418604651163) internal successors, (324), 86 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:16:26,277 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 457 transitions. [2024-12-02 14:16:26,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2024-12-02 14:16:26,277 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:16:26,278 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 21, 21, 21, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:16:26,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-12-02 14:16:26,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-12-02 14:16:26,478 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:16:26,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:16:26,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1443620523, now seen corresponding path program 36 times [2024-12-02 14:16:26,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:16:26,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254009832] [2024-12-02 14:16:26,478 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:16:26,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:16:26,554 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2024-12-02 14:16:26,554 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:16:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2044 backedges. 820 proven. 1218 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:29,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:16:29,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254009832] [2024-12-02 14:16:29,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254009832] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:16:29,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818279331] [2024-12-02 14:16:29,158 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:16:29,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:16:29,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:16:29,160 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:16:29,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-12-02 14:16:31,531 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2024-12-02 14:16:31,531 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:16:31,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 168 conjuncts are in the unsatisfiable core [2024-12-02 14:16:31,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:16:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2044 backedges. 861 proven. 1177 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:32,734 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:16:34,488 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 [2024-12-02 14:16:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2044 backedges. 861 proven. 1177 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:35,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818279331] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:16:35,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:16:35,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 50, 50] total 107 [2024-12-02 14:16:35,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473002493] [2024-12-02 14:16:35,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:16:35,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-12-02 14:16:35,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:16:35,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-12-02 14:16:35,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1734, Invalid=9822, Unknown=0, NotChecked=0, Total=11556 [2024-12-02 14:16:35,297 INFO L87 Difference]: Start difference. First operand 431 states and 457 transitions. Second operand has 108 states, 107 states have (on average 4.158878504672897) internal successors, (445), 108 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:16:38,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:16:38,445 INFO L93 Difference]: Finished difference Result 550 states and 577 transitions. [2024-12-02 14:16:38,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-12-02 14:16:38,446 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 4.158878504672897) internal successors, (445), 108 states have internal predecessors, (445), 0 states have call successors, (0), 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 220 [2024-12-02 14:16:38,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:16:38,447 INFO L225 Difference]: With dead ends: 550 [2024-12-02 14:16:38,447 INFO L226 Difference]: Without dead ends: 550 [2024-12-02 14:16:38,448 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 363 SyntacticMatches, 23 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11312 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3847, Invalid=20023, Unknown=0, NotChecked=0, Total=23870 [2024-12-02 14:16:38,448 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 1111 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:16:38,448 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 989 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-12-02 14:16:38,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2024-12-02 14:16:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 441. [2024-12-02 14:16:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 1.0636363636363637) internal successors, (468), 440 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:16:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 468 transitions. [2024-12-02 14:16:38,452 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 468 transitions. Word has length 220 [2024-12-02 14:16:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:16:38,452 INFO L471 AbstractCegarLoop]: Abstraction has 441 states and 468 transitions. [2024-12-02 14:16:38,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 4.158878504672897) internal successors, (445), 108 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:16:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 468 transitions. [2024-12-02 14:16:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2024-12-02 14:16:38,454 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:16:38,454 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:16:38,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-12-02 14:16:38,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-12-02 14:16:38,654 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:16:38,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:16:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1483988211, now seen corresponding path program 37 times [2024-12-02 14:16:38,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:16:38,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901521689] [2024-12-02 14:16:38,655 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:16:38,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:16:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:16:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2151 backedges. 65 proven. 2080 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:41,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:16:41,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901521689] [2024-12-02 14:16:41,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901521689] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:16:41,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728090595] [2024-12-02 14:16:41,507 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:16:41,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:16:41,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:16:41,509 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:16:41,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-12-02 14:16:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:16:41,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 240 conjuncts are in the unsatisfiable core [2024-12-02 14:16:41,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:16:42,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:16:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2151 backedges. 65 proven. 2080 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:43,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:16:43,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:16:43,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:16:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2151 backedges. 65 proven. 2080 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:43,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728090595] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:16:43,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:16:43,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54, 54] total 86 [2024-12-02 14:16:43,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816403395] [2024-12-02 14:16:43,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:16:43,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-12-02 14:16:43,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:16:43,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-12-02 14:16:43,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=7072, Unknown=0, NotChecked=0, Total=7310 [2024-12-02 14:16:43,629 INFO L87 Difference]: Start difference. First operand 441 states and 468 transitions. Second operand has 86 states, 86 states have (on average 3.872093023255814) internal successors, (333), 86 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:16:49,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:16:49,211 INFO L93 Difference]: Finished difference Result 796 states and 845 transitions. [2024-12-02 14:16:49,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-12-02 14:16:49,211 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.872093023255814) internal successors, (333), 86 states have internal predecessors, (333), 0 states have call successors, (0), 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 225 [2024-12-02 14:16:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:16:49,212 INFO L225 Difference]: With dead ends: 796 [2024-12-02 14:16:49,212 INFO L226 Difference]: Without dead ends: 455 [2024-12-02 14:16:49,213 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4039 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=542, Invalid=17818, Unknown=0, NotChecked=0, Total=18360 [2024-12-02 14:16:49,213 INFO L435 NwaCegarLoop]: 208 mSDtfsCounter, 476 mSDsluCounter, 11229 mSDsCounter, 0 mSdLazyCounter, 8433 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 11437 SdHoareTripleChecker+Invalid, 8477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 8433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:16:49,213 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 11437 Invalid, 8477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 8433 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-12-02 14:16:49,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2024-12-02 14:16:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 449. [2024-12-02 14:16:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.0625) internal successors, (476), 448 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:16:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 476 transitions. [2024-12-02 14:16:49,216 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 476 transitions. Word has length 225 [2024-12-02 14:16:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:16:49,216 INFO L471 AbstractCegarLoop]: Abstraction has 449 states and 476 transitions. [2024-12-02 14:16:49,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.872093023255814) internal successors, (333), 86 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:16:49,216 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 476 transitions. [2024-12-02 14:16:49,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-12-02 14:16:49,217 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:16:49,217 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 22, 22, 22, 22, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:16:49,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-12-02 14:16:49,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:16:49,418 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:16:49,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:16:49,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1038156902, now seen corresponding path program 38 times [2024-12-02 14:16:49,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:16:49,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316534119] [2024-12-02 14:16:49,418 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:16:49,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:16:49,449 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:16:49,449 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:16:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 861 proven. 1373 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:52,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:16:52,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316534119] [2024-12-02 14:16:52,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316534119] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:16:52,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134720843] [2024-12-02 14:16:52,196 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:16:52,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:16:52,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:16:52,197 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:16:52,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-12-02 14:16:52,443 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:16:52,443 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:16:52,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 217 conjuncts are in the unsatisfiable core [2024-12-02 14:16:52,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:16:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 946 proven. 1288 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:53,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:16:55,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 14:16:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 946 proven. 1288 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:16:56,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134720843] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:16:56,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:16:56,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 108 [2024-12-02 14:16:56,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2650994] [2024-12-02 14:16:56,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:16:56,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-12-02 14:16:56,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:16:56,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-12-02 14:16:56,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1314, Invalid=10458, Unknown=0, NotChecked=0, Total=11772 [2024-12-02 14:16:56,951 INFO L87 Difference]: Start difference. First operand 449 states and 476 transitions. Second operand has 109 states, 108 states have (on average 4.212962962962963) internal successors, (455), 109 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:17:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:17:02,233 INFO L93 Difference]: Finished difference Result 573 states and 601 transitions. [2024-12-02 14:17:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-12-02 14:17:02,234 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 108 states have (on average 4.212962962962963) internal successors, (455), 109 states have internal predecessors, (455), 0 states have call successors, (0), 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 229 [2024-12-02 14:17:02,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:17:02,235 INFO L225 Difference]: With dead ends: 573 [2024-12-02 14:17:02,235 INFO L226 Difference]: Without dead ends: 573 [2024-12-02 14:17:02,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 378 SyntacticMatches, 24 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10058 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2283, Invalid=22523, Unknown=0, NotChecked=0, Total=24806 [2024-12-02 14:17:02,237 INFO L435 NwaCegarLoop]: 193 mSDtfsCounter, 983 mSDsluCounter, 7330 mSDsCounter, 0 mSdLazyCounter, 6996 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 7523 SdHoareTripleChecker+Invalid, 6997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:17:02,237 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 7523 Invalid, 6997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6996 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-12-02 14:17:02,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2024-12-02 14:17:02,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 459. [2024-12-02 14:17:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.0633187772925765) internal successors, (487), 458 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:17:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 487 transitions. [2024-12-02 14:17:02,241 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 487 transitions. Word has length 229 [2024-12-02 14:17:02,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:17:02,241 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 487 transitions. [2024-12-02 14:17:02,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 108 states have (on average 4.212962962962963) internal successors, (455), 109 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:17:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 487 transitions. [2024-12-02 14:17:02,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2024-12-02 14:17:02,242 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:17:02,242 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:17:02,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-12-02 14:17:02,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:17:02,442 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:17:02,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:17:02,443 INFO L85 PathProgramCache]: Analyzing trace with hash 956532068, now seen corresponding path program 39 times [2024-12-02 14:17:02,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:17:02,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398525089] [2024-12-02 14:17:02,443 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:17:02,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:17:02,564 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-12-02 14:17:02,564 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:17:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 861 proven. 1485 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:17:07,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:17:07,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398525089] [2024-12-02 14:17:07,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398525089] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:17:07,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307751539] [2024-12-02 14:17:07,326 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:17:07,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:17:07,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:17:07,327 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:17:07,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-12-02 14:17:09,332 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-12-02 14:17:09,332 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:17:09,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 254 conjuncts are in the unsatisfiable core [2024-12-02 14:17:09,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:17:11,069 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 [2024-12-02 14:17:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 68 proven. 2278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:17:13,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:17:16,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:17:16,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:17:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 68 proven. 2278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:17:18,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307751539] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:17:18,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:17:18,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 57, 56] total 170 [2024-12-02 14:17:18,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739509987] [2024-12-02 14:17:18,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:17:18,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2024-12-02 14:17:18,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:17:18,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2024-12-02 14:17:18,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1044, Invalid=27686, Unknown=0, NotChecked=0, Total=28730 [2024-12-02 14:17:18,660 INFO L87 Difference]: Start difference. First operand 459 states and 487 transitions. Second operand has 170 states, 170 states have (on average 3.9823529411764707) internal successors, (677), 170 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:17:43,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:17:43,990 INFO L93 Difference]: Finished difference Result 949 states and 1001 transitions. [2024-12-02 14:17:43,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2024-12-02 14:17:43,990 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 3.9823529411764707) internal successors, (677), 170 states have internal predecessors, (677), 0 states have call successors, (0), 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 234 [2024-12-02 14:17:43,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:17:43,991 INFO L225 Difference]: With dead ends: 949 [2024-12-02 14:17:43,991 INFO L226 Difference]: Without dead ends: 593 [2024-12-02 14:17:43,995 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27584 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=5884, Invalid=95558, Unknown=0, NotChecked=0, Total=101442 [2024-12-02 14:17:43,995 INFO L435 NwaCegarLoop]: 191 mSDtfsCounter, 2116 mSDsluCounter, 13741 mSDsCounter, 0 mSdLazyCounter, 14347 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2116 SdHoareTripleChecker+Valid, 13932 SdHoareTripleChecker+Invalid, 14502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 14347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:17:43,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2116 Valid, 13932 Invalid, 14502 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [155 Valid, 14347 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2024-12-02 14:17:43,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2024-12-02 14:17:43,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 477. [2024-12-02 14:17:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.0630252100840336) internal successors, (506), 476 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:17:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 506 transitions. [2024-12-02 14:17:44,000 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 506 transitions. Word has length 234 [2024-12-02 14:17:44,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:17:44,000 INFO L471 AbstractCegarLoop]: Abstraction has 477 states and 506 transitions. [2024-12-02 14:17:44,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 3.9823529411764707) internal successors, (677), 170 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:17:44,000 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 506 transitions. [2024-12-02 14:17:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2024-12-02 14:17:44,001 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:17:44,001 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:17:44,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-12-02 14:17:44,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:17:44,202 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:17:44,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:17:44,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2009040831, now seen corresponding path program 40 times [2024-12-02 14:17:44,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:17:44,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462997306] [2024-12-02 14:17:44,202 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:17:44,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:17:44,247 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:17:44,247 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:17:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2562 backedges. 71 proven. 2485 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:17:47,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:17:47,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462997306] [2024-12-02 14:17:47,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462997306] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:17:47,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387327433] [2024-12-02 14:17:47,112 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:17:47,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:17:47,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:17:47,113 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:17:47,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-12-02 14:17:47,523 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:17:47,523 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:17:47,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 258 conjuncts are in the unsatisfiable core [2024-12-02 14:17:47,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:17:47,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:17:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2562 backedges. 71 proven. 2485 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:17:48,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:17:48,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:17:48,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:17:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2562 backedges. 71 proven. 2485 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:17:48,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387327433] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:17:48,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:17:48,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 62 [2024-12-02 14:17:48,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753244838] [2024-12-02 14:17:48,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:17:48,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-12-02 14:17:48,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:17:48,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-12-02 14:17:48,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3645, Unknown=0, NotChecked=0, Total=3782 [2024-12-02 14:17:48,472 INFO L87 Difference]: Start difference. First operand 477 states and 506 transitions. Second operand has 62 states, 62 states have (on average 4.016129032258065) internal successors, (249), 62 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:17:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:17:53,736 INFO L93 Difference]: Finished difference Result 862 states and 915 transitions. [2024-12-02 14:17:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-12-02 14:17:53,736 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 4.016129032258065) internal successors, (249), 62 states have internal predecessors, (249), 0 states have call successors, (0), 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 243 [2024-12-02 14:17:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:17:53,737 INFO L225 Difference]: With dead ends: 862 [2024-12-02 14:17:53,737 INFO L226 Difference]: Without dead ends: 491 [2024-12-02 14:17:53,738 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=337, Invalid=12095, Unknown=0, NotChecked=0, Total=12432 [2024-12-02 14:17:53,738 INFO L435 NwaCegarLoop]: 226 mSDtfsCounter, 312 mSDsluCounter, 11758 mSDsCounter, 0 mSdLazyCounter, 8480 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 11984 SdHoareTripleChecker+Invalid, 8504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 8480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-12-02 14:17:53,738 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 11984 Invalid, 8504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 8480 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-12-02 14:17:53,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2024-12-02 14:17:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 485. [2024-12-02 14:17:53,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.06198347107438) internal successors, (514), 484 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:17:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 514 transitions. [2024-12-02 14:17:53,741 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 514 transitions. Word has length 243 [2024-12-02 14:17:53,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:17:53,741 INFO L471 AbstractCegarLoop]: Abstraction has 485 states and 514 transitions. [2024-12-02 14:17:53,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 4.016129032258065) internal successors, (249), 62 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:17:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 514 transitions. [2024-12-02 14:17:53,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2024-12-02 14:17:53,742 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:17:53,742 INFO L218 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 24, 24, 24, 24, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:17:53,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-12-02 14:17:53,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:17:53,942 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:17:53,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:17:53,943 INFO L85 PathProgramCache]: Analyzing trace with hash 516283176, now seen corresponding path program 41 times [2024-12-02 14:17:53,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:17:53,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315663093] [2024-12-02 14:17:53,943 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:17:53,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:17:54,036 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2024-12-02 14:17:54,037 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:17:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2659 backedges. 1176 proven. 1477 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:17:57,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:17:57,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315663093] [2024-12-02 14:17:57,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315663093] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:17:57,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440929857] [2024-12-02 14:17:57,009 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:17:57,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:17:57,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:17:57,011 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:17:57,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-12-02 14:17:59,373 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2024-12-02 14:17:59,373 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:17:59,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 240 conjuncts are in the unsatisfiable core [2024-12-02 14:17:59,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:17:59,394 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 [2024-12-02 14:18:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2659 backedges. 1176 proven. 1477 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:18:01,907 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:18:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2659 backedges. 1225 proven. 1428 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:18:07,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440929857] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:18:07,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:18:07,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 55, 55] total 142 [2024-12-02 14:18:07,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955731614] [2024-12-02 14:18:07,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:18:07,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2024-12-02 14:18:07,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:18:07,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2024-12-02 14:18:07,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2359, Invalid=17947, Unknown=0, NotChecked=0, Total=20306 [2024-12-02 14:18:07,815 INFO L87 Difference]: Start difference. First operand 485 states and 514 transitions. Second operand has 143 states, 142 states have (on average 4.288732394366197) internal successors, (609), 143 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:18:14,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:18:14,659 INFO L93 Difference]: Finished difference Result 619 states and 649 transitions. [2024-12-02 14:18:14,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-12-02 14:18:14,659 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 142 states have (on average 4.288732394366197) internal successors, (609), 143 states have internal predecessors, (609), 0 states have call successors, (0), 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 247 [2024-12-02 14:18:14,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:18:14,660 INFO L225 Difference]: With dead ends: 619 [2024-12-02 14:18:14,660 INFO L226 Difference]: Without dead ends: 619 [2024-12-02 14:18:14,662 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9824 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=3421, Invalid=34021, Unknown=0, NotChecked=0, Total=37442 [2024-12-02 14:18:14,662 INFO L435 NwaCegarLoop]: 209 mSDtfsCounter, 1147 mSDsluCounter, 7916 mSDsCounter, 0 mSdLazyCounter, 7538 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 8125 SdHoareTripleChecker+Invalid, 7538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-12-02 14:18:14,662 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1147 Valid, 8125 Invalid, 7538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7538 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-12-02 14:18:14,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2024-12-02 14:18:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 495. [2024-12-02 14:18:14,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.062753036437247) internal successors, (525), 494 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:18:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 525 transitions. [2024-12-02 14:18:14,666 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 525 transitions. Word has length 247 [2024-12-02 14:18:14,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:18:14,666 INFO L471 AbstractCegarLoop]: Abstraction has 495 states and 525 transitions. [2024-12-02 14:18:14,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 142 states have (on average 4.288732394366197) internal successors, (609), 143 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:18:14,667 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 525 transitions. [2024-12-02 14:18:14,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2024-12-02 14:18:14,667 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:18:14,667 INFO L218 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:18:14,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-12-02 14:18:14,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:18:14,868 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:18:14,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:18:14,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1327509142, now seen corresponding path program 42 times [2024-12-02 14:18:14,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:18:14,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971441508] [2024-12-02 14:18:14,868 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:18:14,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:18:14,997 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2024-12-02 14:18:14,997 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:18:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2781 backedges. 74 proven. 2701 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:18:19,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:18:19,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971441508] [2024-12-02 14:18:19,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971441508] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:18:19,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805348347] [2024-12-02 14:18:19,807 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:18:19,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:18:19,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:18:19,809 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:18:19,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-12-02 14:18:24,245 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2024-12-02 14:18:24,245 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:18:24,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 274 conjuncts are in the unsatisfiable core [2024-12-02 14:18:24,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:18:26,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:18:26,584 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 7 treesize of output 3 [2024-12-02 14:18:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2781 backedges. 74 proven. 2701 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:18:26,587 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:18:26,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:18:26,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 14:18:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2781 backedges. 74 proven. 2701 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:18:27,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805348347] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:18:27,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:18:27,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 60, 60] total 103 [2024-12-02 14:18:27,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720118374] [2024-12-02 14:18:27,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:18:27,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-12-02 14:18:27,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:18:27,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-12-02 14:18:27,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=10226, Unknown=0, NotChecked=0, Total=10506 [2024-12-02 14:18:27,122 INFO L87 Difference]: Start difference. First operand 495 states and 525 transitions. Second operand has 103 states, 103 states have (on average 3.7281553398058254) internal successors, (384), 103 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:18:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:18:37,270 INFO L93 Difference]: Finished difference Result 895 states and 950 transitions. [2024-12-02 14:18:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-12-02 14:18:37,271 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.7281553398058254) internal successors, (384), 103 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2024-12-02 14:18:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:18:37,272 INFO L225 Difference]: With dead ends: 895 [2024-12-02 14:18:37,272 INFO L226 Difference]: Without dead ends: 509 [2024-12-02 14:18:37,273 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6401 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=707, Invalid=28363, Unknown=0, NotChecked=0, Total=29070 [2024-12-02 14:18:37,273 INFO L435 NwaCegarLoop]: 234 mSDtfsCounter, 485 mSDsluCounter, 16733 mSDsCounter, 0 mSdLazyCounter, 13157 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 16967 SdHoareTripleChecker+Invalid, 13184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 13157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-12-02 14:18:37,273 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 16967 Invalid, 13184 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 13157 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-12-02 14:18:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2024-12-02 14:18:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 503. [2024-12-02 14:18:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.0617529880478087) internal successors, (533), 502 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:18:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 533 transitions. [2024-12-02 14:18:37,276 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 533 transitions. Word has length 252 [2024-12-02 14:18:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:18:37,277 INFO L471 AbstractCegarLoop]: Abstraction has 503 states and 533 transitions. [2024-12-02 14:18:37,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.7281553398058254) internal successors, (384), 103 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:18:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 533 transitions. [2024-12-02 14:18:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2024-12-02 14:18:37,277 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:18:37,278 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 25, 25, 25, 25, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:18:37,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-12-02 14:18:37,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:18:37,478 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:18:37,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:18:37,478 INFO L85 PathProgramCache]: Analyzing trace with hash -909238385, now seen corresponding path program 43 times [2024-12-02 14:18:37,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:18:37,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702819962] [2024-12-02 14:18:37,479 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:18:37,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:18:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:18:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 1176 proven. 1700 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:18:41,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:18:41,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702819962] [2024-12-02 14:18:41,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702819962] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:18:41,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943567279] [2024-12-02 14:18:41,360 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:18:41,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:18:41,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:18:41,362 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:18:41,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-12-02 14:18:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:18:41,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 243 conjuncts are in the unsatisfiable core [2024-12-02 14:18:41,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:18:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 1275 proven. 1601 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:18:43,670 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:18:46,368 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 [2024-12-02 14:18:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 1275 proven. 1601 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:18:47,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943567279] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:18:47,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:18:47,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 57, 57] total 119 [2024-12-02 14:18:47,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129729943] [2024-12-02 14:18:47,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:18:47,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2024-12-02 14:18:47,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:18:47,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2024-12-02 14:18:47,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1634, Invalid=12646, Unknown=0, NotChecked=0, Total=14280 [2024-12-02 14:18:47,679 INFO L87 Difference]: Start difference. First operand 503 states and 533 transitions. Second operand has 120 states, 119 states have (on average 4.319327731092437) internal successors, (514), 120 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:18:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:18:53,958 INFO L93 Difference]: Finished difference Result 642 states and 673 transitions. [2024-12-02 14:18:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-12-02 14:18:53,959 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 4.319327731092437) internal successors, (514), 120 states have internal predecessors, (514), 0 states have call successors, (0), 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 256 [2024-12-02 14:18:53,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:18:53,960 INFO L225 Difference]: With dead ends: 642 [2024-12-02 14:18:53,960 INFO L226 Difference]: Without dead ends: 642 [2024-12-02 14:18:53,961 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 425 SyntacticMatches, 26 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12152 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=2737, Invalid=27019, Unknown=0, NotChecked=0, Total=29756 [2024-12-02 14:18:53,961 INFO L435 NwaCegarLoop]: 216 mSDtfsCounter, 1203 mSDsluCounter, 8578 mSDsCounter, 0 mSdLazyCounter, 8302 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 8794 SdHoareTripleChecker+Invalid, 8302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-12-02 14:18:53,961 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1203 Valid, 8794 Invalid, 8302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8302 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-12-02 14:18:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2024-12-02 14:18:53,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 513. [2024-12-02 14:18:53,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.0625) internal successors, (544), 512 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:18:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 544 transitions. [2024-12-02 14:18:53,966 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 544 transitions. Word has length 256 [2024-12-02 14:18:53,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:18:53,966 INFO L471 AbstractCegarLoop]: Abstraction has 513 states and 544 transitions. [2024-12-02 14:18:53,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 119 states have (on average 4.319327731092437) internal successors, (514), 120 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:18:53,966 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 544 transitions. [2024-12-02 14:18:53,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2024-12-02 14:18:53,967 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:18:53,967 INFO L218 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:18:53,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-12-02 14:18:54,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:18:54,167 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:18:54,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:18:54,168 INFO L85 PathProgramCache]: Analyzing trace with hash 40211087, now seen corresponding path program 44 times [2024-12-02 14:18:54,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:18:54,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037067494] [2024-12-02 14:18:54,168 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:18:54,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:18:54,218 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:18:54,218 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:18:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 77 proven. 2926 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:18:57,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:18:57,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037067494] [2024-12-02 14:18:57,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037067494] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:18:57,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069869009] [2024-12-02 14:18:57,831 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:18:57,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:18:57,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:18:57,833 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:18:57,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-12-02 14:18:58,135 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:18:58,135 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:18:58,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 279 conjuncts are in the unsatisfiable core [2024-12-02 14:18:58,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:19:00,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:19:04,362 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 14:19:04,364 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 14:19:04,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2024-12-02 14:19:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 77 proven. 2926 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:19:04,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:19:05,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 14:19:05,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-12-02 14:19:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 77 proven. 2926 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:19:09,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069869009] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:19:09,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:19:09,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 157 [2024-12-02 14:19:09,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982586266] [2024-12-02 14:19:09,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:19:09,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2024-12-02 14:19:09,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:19:09,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2024-12-02 14:19:09,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=23923, Unknown=0, NotChecked=0, Total=24492 [2024-12-02 14:19:09,201 INFO L87 Difference]: Start difference. First operand 513 states and 544 transitions. Second operand has 157 states, 157 states have (on average 3.961783439490446) internal successors, (622), 157 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:19:21,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:19:21,995 INFO L93 Difference]: Finished difference Result 928 states and 985 transitions. [2024-12-02 14:19:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-12-02 14:19:21,995 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 3.961783439490446) internal successors, (622), 157 states have internal predecessors, (622), 0 states have call successors, (0), 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 261 [2024-12-02 14:19:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:19:21,996 INFO L225 Difference]: With dead ends: 928 [2024-12-02 14:19:21,996 INFO L226 Difference]: Without dead ends: 527 [2024-12-02 14:19:21,998 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 428 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15087 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1030, Invalid=44552, Unknown=0, NotChecked=0, Total=45582 [2024-12-02 14:19:21,998 INFO L435 NwaCegarLoop]: 244 mSDtfsCounter, 559 mSDsluCounter, 21498 mSDsCounter, 0 mSdLazyCounter, 15974 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 21742 SdHoareTripleChecker+Invalid, 16001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 15974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2024-12-02 14:19:21,998 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 21742 Invalid, 16001 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 15974 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2024-12-02 14:19:21,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2024-12-02 14:19:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 521. [2024-12-02 14:19:22,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.0615384615384615) internal successors, (552), 520 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:19:22,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 552 transitions. [2024-12-02 14:19:22,001 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 552 transitions. Word has length 261 [2024-12-02 14:19:22,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:19:22,001 INFO L471 AbstractCegarLoop]: Abstraction has 521 states and 552 transitions. [2024-12-02 14:19:22,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 3.961783439490446) internal successors, (622), 157 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:19:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 552 transitions. [2024-12-02 14:19:22,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2024-12-02 14:19:22,002 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:19:22,002 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 26, 26, 26, 26, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:19:22,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-12-02 14:19:22,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:19:22,203 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-12-02 14:19:22,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:19:22,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1345017418, now seen corresponding path program 45 times [2024-12-02 14:19:22,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:19:22,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333460912] [2024-12-02 14:19:22,203 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:19:22,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:19:22,362 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2024-12-02 14:19:22,362 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:19:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3114 backedges. 1326 proven. 1677 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-12-02 14:19:27,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:19:27,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333460912] [2024-12-02 14:19:27,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333460912] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:19:27,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542115216] [2024-12-02 14:19:27,470 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:19:27,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:19:27,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:19:27,472 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:19:27,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c3d34e4-078a-4592-b1d2-e1dbd5df2ebc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-12-02 14:19:32,182 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2024-12-02 14:19:32,182 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:19:32,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 236 conjuncts are in the unsatisfiable core [2024-12-02 14:19:32,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:19:32,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 14:19:33,746 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 14 treesize of output 10 [2024-12-02 14:21:58,600 INFO L349 Elim1Store]: treesize reduction 24, result has 90.9 percent of original size [2024-12-02 14:21:58,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 269 [2024-12-02 14:22:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3114 backedges. 1252 proven. 1748 refuted. 3 times theorem prover too weak. 111 trivial. 0 not checked. [2024-12-02 14:22:01,283 INFO L312 TraceCheckSpWp]: Computing backward predicates...