./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.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_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB --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 fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:08:02,787 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:08:02,864 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 05:08:02,871 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:08:02,871 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:08:02,903 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:08:02,903 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:08:02,904 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:08:02,904 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:08:02,904 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:08:02,905 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:08:02,905 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:08:02,905 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:08:02,906 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:08:02,906 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:08:02,906 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:08:02,906 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:08:02,906 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:08:02,906 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:08:02,907 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:08:02,907 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 05:08:02,907 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 05:08:02,907 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 05:08:02,907 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:08:02,907 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 05:08:02,907 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 05:08:02,907 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:08:02,908 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:08:02,908 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:08:02,908 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:08:02,908 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:08:02,908 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:08:02,908 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:08:02,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:08:02,908 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:08:02,909 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:08:02,909 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:08:02,909 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:08:02,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:08:02,909 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:08:02,909 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:08:02,909 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:08:02,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:08:02,910 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:08:02,910 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:08:02,910 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:08:02,911 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:08:02,911 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_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB 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 -> fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 [2024-11-28 05:08:03,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:08:03,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:08:03,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:08:03,338 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:08:03,338 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:08:03,340 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2024-11-28 05:08:07,016 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/data/def032996/37295fe8b88a495fa433361475015d3f/FLAG194b5a337 [2024-11-28 05:08:07,438 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:08:07,442 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2024-11-28 05:08:07,464 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/data/def032996/37295fe8b88a495fa433361475015d3f/FLAG194b5a337 [2024-11-28 05:08:07,493 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/data/def032996/37295fe8b88a495fa433361475015d3f [2024-11-28 05:08:07,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:08:07,499 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:08:07,500 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:08:07,503 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:08:07,509 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:08:07,510 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:08:07" (1/1) ... [2024-11-28 05:08:07,514 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e1646d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:07, skipping insertion in model container [2024-11-28 05:08:07,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:08:07" (1/1) ... [2024-11-28 05:08:07,565 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:08:08,011 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 05:08:08,012 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 05:08:08,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:08:08,031 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:08:08,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:08:08,119 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:08:08,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08 WrapperNode [2024-11-28 05:08:08,120 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:08:08,121 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:08:08,122 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:08:08,122 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:08:08,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08" (1/1) ... [2024-11-28 05:08:08,141 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08" (1/1) ... [2024-11-28 05:08:08,165 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2024-11-28 05:08:08,166 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:08:08,167 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:08:08,167 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:08:08,167 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:08:08,178 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08" (1/1) ... [2024-11-28 05:08:08,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08" (1/1) ... [2024-11-28 05:08:08,181 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08" (1/1) ... [2024-11-28 05:08:08,197 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [1, 3]. 75 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 3 writes are split as follows [1, 2]. [2024-11-28 05:08:08,198 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08" (1/1) ... [2024-11-28 05:08:08,198 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08" (1/1) ... [2024-11-28 05:08:08,210 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08" (1/1) ... [2024-11-28 05:08:08,212 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08" (1/1) ... [2024-11-28 05:08:08,216 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08" (1/1) ... [2024-11-28 05:08:08,218 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08" (1/1) ... [2024-11-28 05:08:08,220 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08" (1/1) ... [2024-11-28 05:08:08,222 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:08:08,223 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:08:08,224 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:08:08,224 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:08:08,225 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08" (1/1) ... [2024-11-28 05:08:08,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:08:08,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:08,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:08:08,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:08:08,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:08:08,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:08:08,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:08:08,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:08:08,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 05:08:08,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 05:08:08,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:08:08,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:08:08,448 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:08:08,450 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:08:08,676 INFO L? ?]: Removed 44 outVars from TransFormulas that were not future-live. [2024-11-28 05:08:08,676 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:08:08,687 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:08:08,687 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-28 05:08:08,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:08:08 BoogieIcfgContainer [2024-11-28 05:08:08,688 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:08:08,690 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:08:08,690 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:08:08,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:08:08,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:08:07" (1/3) ... [2024-11-28 05:08:08,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5521b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:08:08, skipping insertion in model container [2024-11-28 05:08:08,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:08" (2/3) ... [2024-11-28 05:08:08,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5521b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:08:08, skipping insertion in model container [2024-11-28 05:08:08,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:08:08" (3/3) ... [2024-11-28 05:08:08,699 INFO L128 eAbstractionObserver]: Analyzing ICFG cstrcpy-alloca-1.i [2024-11-28 05:08:08,718 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:08:08,720 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG cstrcpy-alloca-1.i that has 1 procedures, 30 locations, 1 initial locations, 2 loop locations, and 9 error locations. [2024-11-28 05:08:08,771 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:08:08,790 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;@9ad46d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:08:08,791 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-28 05:08:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.8) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:08,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-28 05:08:08,807 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:08,807 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 05:08:08,808 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:08,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:08,817 INFO L85 PathProgramCache]: Analyzing trace with hash 889510841, now seen corresponding path program 1 times [2024-11-28 05:08:08,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:08,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73993926] [2024-11-28 05:08:08,830 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:08,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:09,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:09,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73993926] [2024-11-28 05:08:09,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73993926] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:09,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:09,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:08:09,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434620230] [2024-11-28 05:08:09,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:09,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:08:09,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:09,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:08:09,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:08:09,200 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.8) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:09,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:09,296 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-11-28 05:08:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:08:09,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-28 05:08:09,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:09,309 INFO L225 Difference]: With dead ends: 31 [2024-11-28 05:08:09,309 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 05:08:09,311 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:08:09,317 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:09,320 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 80 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:09,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 05:08:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-28 05:08:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.65) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-28 05:08:09,364 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 6 [2024-11-28 05:08:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:09,364 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-28 05:08:09,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-28 05:08:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-28 05:08:09,365 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:09,365 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 05:08:09,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:08:09,366 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:09,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:09,367 INFO L85 PathProgramCache]: Analyzing trace with hash 889512763, now seen corresponding path program 1 times [2024-11-28 05:08:09,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:09,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290282598] [2024-11-28 05:08:09,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:09,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:09,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:09,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290282598] [2024-11-28 05:08:09,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290282598] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:09,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:09,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:08:09,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570245657] [2024-11-28 05:08:09,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:09,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:08:09,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:09,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:08:09,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:08:09,429 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:09,467 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-11-28 05:08:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:08:09,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-28 05:08:09,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:09,469 INFO L225 Difference]: With dead ends: 30 [2024-11-28 05:08:09,469 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 05:08:09,470 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 [2024-11-28 05:08:09,471 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:09,471 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:08:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 05:08:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-11-28 05:08:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.631578947368421) internal successors, (31), 27 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) [2024-11-28 05:08:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-28 05:08:09,477 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2024-11-28 05:08:09,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:09,477 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-28 05:08:09,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:09,480 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-28 05:08:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 05:08:09,480 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:09,480 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:09,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:08:09,482 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:09,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:09,483 INFO L85 PathProgramCache]: Analyzing trace with hash 121448370, now seen corresponding path program 1 times [2024-11-28 05:08:09,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:09,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084891890] [2024-11-28 05:08:09,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:09,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:09,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:09,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084891890] [2024-11-28 05:08:09,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084891890] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:09,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:09,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:08:09,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811615940] [2024-11-28 05:08:09,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:09,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:08:09,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:09,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:08:09,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:08:09,693 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:09,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:09,735 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-11-28 05:08:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:08:09,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-28 05:08:09,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:09,737 INFO L225 Difference]: With dead ends: 33 [2024-11-28 05:08:09,738 INFO L226 Difference]: Without dead ends: 33 [2024-11-28 05:08:09,738 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:08:09,739 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:09,740 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:08:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-28 05:08:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2024-11-28 05:08:09,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-28 05:08:09,745 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 8 [2024-11-28 05:08:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:09,745 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-28 05:08:09,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-28 05:08:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 05:08:09,746 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:09,747 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:09,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 05:08:09,747 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:09,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:09,748 INFO L85 PathProgramCache]: Analyzing trace with hash 121450547, now seen corresponding path program 1 times [2024-11-28 05:08:09,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:09,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699770512] [2024-11-28 05:08:09,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:09,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:09,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:09,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699770512] [2024-11-28 05:08:09,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699770512] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:09,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:09,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:08:09,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481945248] [2024-11-28 05:08:09,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:09,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:08:09,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:09,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:08:09,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:08:09,918 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. 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) [2024-11-28 05:08:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:09,967 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-11-28 05:08:09,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:08:09,967 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 [2024-11-28 05:08:09,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:09,969 INFO L225 Difference]: With dead ends: 28 [2024-11-28 05:08:09,970 INFO L226 Difference]: Without dead ends: 28 [2024-11-28 05:08:09,970 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 [2024-11-28 05:08:09,971 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:09,971 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:08:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-28 05:08:09,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-28 05:08:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 27 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) [2024-11-28 05:08:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-28 05:08:09,981 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 8 [2024-11-28 05:08:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:09,982 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-28 05:08:09,982 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) [2024-11-28 05:08:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-28 05:08:09,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 05:08:09,984 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:09,984 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:09,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 05:08:09,986 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:09,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:09,987 INFO L85 PathProgramCache]: Analyzing trace with hash 121450548, now seen corresponding path program 1 times [2024-11-28 05:08:09,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:09,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958424038] [2024-11-28 05:08:09,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:09,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:10,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:10,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958424038] [2024-11-28 05:08:10,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958424038] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:10,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:10,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:08:10,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809089153] [2024-11-28 05:08:10,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:10,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:08:10,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:10,423 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:08:10,423 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:08:10,423 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:10,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:10,507 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-11-28 05:08:10,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:08:10,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-28 05:08:10,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:10,509 INFO L225 Difference]: With dead ends: 30 [2024-11-28 05:08:10,509 INFO L226 Difference]: Without dead ends: 30 [2024-11-28 05:08:10,509 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:08:10,510 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:10,511 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-28 05:08:10,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-28 05:08:10,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.434782608695652) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-28 05:08:10,515 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 8 [2024-11-28 05:08:10,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:10,516 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-28 05:08:10,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:10,516 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-28 05:08:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 05:08:10,517 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:10,517 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:10,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 05:08:10,517 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:10,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:10,518 INFO L85 PathProgramCache]: Analyzing trace with hash 123295412, now seen corresponding path program 1 times [2024-11-28 05:08:10,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:10,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395900509] [2024-11-28 05:08:10,518 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:10,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:10,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:10,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395900509] [2024-11-28 05:08:10,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395900509] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:10,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:10,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:08:10,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823113221] [2024-11-28 05:08:10,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:10,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:08:10,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:10,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:08:10,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:08:10,622 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:10,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:10,660 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2024-11-28 05:08:10,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:08:10,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-28 05:08:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:10,661 INFO L225 Difference]: With dead ends: 35 [2024-11-28 05:08:10,661 INFO L226 Difference]: Without dead ends: 35 [2024-11-28 05:08:10,662 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 [2024-11-28 05:08:10,663 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:10,663 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:08:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-28 05:08:10,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-11-28 05:08:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-28 05:08:10,667 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 8 [2024-11-28 05:08:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:10,667 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-28 05:08:10,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-28 05:08:10,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 05:08:10,668 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:10,668 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:10,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 05:08:10,669 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:10,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:10,669 INFO L85 PathProgramCache]: Analyzing trace with hash 123297590, now seen corresponding path program 1 times [2024-11-28 05:08:10,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:10,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417425349] [2024-11-28 05:08:10,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:10,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:10,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:10,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417425349] [2024-11-28 05:08:10,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417425349] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:10,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:10,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:08:10,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385483254] [2024-11-28 05:08:10,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:10,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:08:10,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:10,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:08:10,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:08:10,961 INFO L87 Difference]: Start difference. First operand 33 states and 37 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) [2024-11-28 05:08:11,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:11,010 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2024-11-28 05:08:11,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:08:11,011 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 [2024-11-28 05:08:11,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:11,011 INFO L225 Difference]: With dead ends: 32 [2024-11-28 05:08:11,011 INFO L226 Difference]: Without dead ends: 32 [2024-11-28 05:08:11,012 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:08:11,013 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:11,013 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:08:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-28 05:08:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2024-11-28 05:08:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 27 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) [2024-11-28 05:08:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-28 05:08:11,023 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2024-11-28 05:08:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:11,023 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-28 05:08:11,023 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) [2024-11-28 05:08:11,023 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-28 05:08:11,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 05:08:11,023 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:11,024 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:11,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 05:08:11,024 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:11,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:11,024 INFO L85 PathProgramCache]: Analyzing trace with hash 180553714, now seen corresponding path program 1 times [2024-11-28 05:08:11,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:11,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254235088] [2024-11-28 05:08:11,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:11,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:11,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:11,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254235088] [2024-11-28 05:08:11,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254235088] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:11,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:11,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:08:11,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289943631] [2024-11-28 05:08:11,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:11,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:08:11,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:11,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:08:11,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:08:11,316 INFO L87 Difference]: Start difference. First operand 28 states and 32 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) [2024-11-28 05:08:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:11,424 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-11-28 05:08:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:08:11,427 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 [2024-11-28 05:08:11,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:11,428 INFO L225 Difference]: With dead ends: 32 [2024-11-28 05:08:11,428 INFO L226 Difference]: Without dead ends: 32 [2024-11-28 05:08:11,428 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:08:11,429 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:11,429 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 49 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-28 05:08:11,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2024-11-28 05:08:11,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.44) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-28 05:08:11,437 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 8 [2024-11-28 05:08:11,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:11,437 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-28 05:08:11,437 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) [2024-11-28 05:08:11,437 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-28 05:08:11,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 05:08:11,438 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:11,438 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:11,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 05:08:11,438 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:11,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:11,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1770793498, now seen corresponding path program 1 times [2024-11-28 05:08:11,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:11,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134879303] [2024-11-28 05:08:11,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:11,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:11,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:11,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134879303] [2024-11-28 05:08:11,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134879303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:11,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:11,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:08:11,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832485970] [2024-11-28 05:08:11,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:11,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:08:11,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:11,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:08:11,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:08:11,730 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:11,857 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2024-11-28 05:08:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:08:11,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-28 05:08:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:11,859 INFO L225 Difference]: With dead ends: 35 [2024-11-28 05:08:11,859 INFO L226 Difference]: Without dead ends: 35 [2024-11-28 05:08:11,859 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:08:11,860 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:11,860 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 87 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-28 05:08:11,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-11-28 05:08:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-28 05:08:11,865 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 11 [2024-11-28 05:08:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:11,865 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-28 05:08:11,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-28 05:08:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 05:08:11,866 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:11,866 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:11,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 05:08:11,866 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:11,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:11,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1770793497, now seen corresponding path program 1 times [2024-11-28 05:08:11,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:11,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659789061] [2024-11-28 05:08:11,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:11,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:11,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:11,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659789061] [2024-11-28 05:08:11,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659789061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:11,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:11,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:08:11,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997742223] [2024-11-28 05:08:11,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:11,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:08:11,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:11,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:08:11,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:08:11,954 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:12,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:12,031 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-11-28 05:08:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:08:12,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-28 05:08:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:12,032 INFO L225 Difference]: With dead ends: 32 [2024-11-28 05:08:12,032 INFO L226 Difference]: Without dead ends: 32 [2024-11-28 05:08:12,032 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 [2024-11-28 05:08:12,033 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:12,033 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 45 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-28 05:08:12,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-28 05:08:12,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-11-28 05:08:12,040 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2024-11-28 05:08:12,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:12,040 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-11-28 05:08:12,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:12,040 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-11-28 05:08:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 05:08:12,043 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:12,043 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:12,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 05:08:12,044 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:12,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:12,044 INFO L85 PathProgramCache]: Analyzing trace with hash -939976422, now seen corresponding path program 1 times [2024-11-28 05:08:12,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:12,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505587229] [2024-11-28 05:08:12,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:12,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:12,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:12,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505587229] [2024-11-28 05:08:12,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505587229] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:12,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:12,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:08:12,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686557194] [2024-11-28 05:08:12,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:12,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:08:12,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:12,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:08:12,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:08:12,287 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2024-11-28 05:08:12,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:12,356 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2024-11-28 05:08:12,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:08:12,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2024-11-28 05:08:12,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:12,357 INFO L225 Difference]: With dead ends: 31 [2024-11-28 05:08:12,358 INFO L226 Difference]: Without dead ends: 31 [2024-11-28 05:08:12,358 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:08:12,359 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:12,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 55 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-28 05:08:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-28 05:08:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-28 05:08:12,364 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 12 [2024-11-28 05:08:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:12,364 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-28 05:08:12,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2024-11-28 05:08:12,365 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-28 05:08:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 05:08:12,365 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:12,365 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:12,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 05:08:12,366 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:12,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:12,366 INFO L85 PathProgramCache]: Analyzing trace with hash -939976421, now seen corresponding path program 1 times [2024-11-28 05:08:12,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:12,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340879124] [2024-11-28 05:08:12,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:12,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:12,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:12,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340879124] [2024-11-28 05:08:12,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340879124] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:12,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:12,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:08:12,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78961147] [2024-11-28 05:08:12,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:12,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:08:12,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:12,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:08:12,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:08:12,647 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2024-11-28 05:08:12,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:12,740 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2024-11-28 05:08:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:08:12,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2024-11-28 05:08:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:12,742 INFO L225 Difference]: With dead ends: 39 [2024-11-28 05:08:12,742 INFO L226 Difference]: Without dead ends: 39 [2024-11-28 05:08:12,742 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:08:12,743 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:12,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 80 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:12,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-28 05:08:12,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-28 05:08:12,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:12,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-11-28 05:08:12,747 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 12 [2024-11-28 05:08:12,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:12,747 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-11-28 05:08:12,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2024-11-28 05:08:12,747 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-11-28 05:08:12,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 05:08:12,750 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:12,750 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:12,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 05:08:12,750 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:12,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:12,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1333003431, now seen corresponding path program 1 times [2024-11-28 05:08:12,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:12,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818160955] [2024-11-28 05:08:12,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:12,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:13,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:13,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818160955] [2024-11-28 05:08:13,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818160955] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:13,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:13,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:08:13,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138433864] [2024-11-28 05:08:13,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:13,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:08:13,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:13,143 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:08:13,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:08:13,143 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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) [2024-11-28 05:08:13,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:13,227 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2024-11-28 05:08:13,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:08:13,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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 [2024-11-28 05:08:13,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:13,228 INFO L225 Difference]: With dead ends: 40 [2024-11-28 05:08:13,229 INFO L226 Difference]: Without dead ends: 40 [2024-11-28 05:08:13,229 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:08:13,230 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:13,230 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 74 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-28 05:08:13,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2024-11-28 05:08:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:13,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-11-28 05:08:13,233 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 12 [2024-11-28 05:08:13,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:13,234 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-11-28 05:08:13,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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) [2024-11-28 05:08:13,234 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-11-28 05:08:13,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 05:08:13,234 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:13,234 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:13,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 05:08:13,235 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:13,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:13,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1630335403, now seen corresponding path program 1 times [2024-11-28 05:08:13,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:13,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000644712] [2024-11-28 05:08:13,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:13,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:13,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:13,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000644712] [2024-11-28 05:08:13,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000644712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:13,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294235761] [2024-11-28 05:08:13,678 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:13,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:13,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:13,682 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:13,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:08:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:13,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 05:08:13,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:13,902 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 [2024-11-28 05:08:13,928 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 [2024-11-28 05:08:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:14,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:14,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294235761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:14,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:14,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-28 05:08:14,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121915994] [2024-11-28 05:08:14,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:14,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 05:08:14,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:14,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 05:08:14,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-11-28 05:08:14,709 INFO L87 Difference]: Start difference. First operand 32 states and 37 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) [2024-11-28 05:08:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:15,050 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2024-11-28 05:08:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:08:15,051 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 [2024-11-28 05:08:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:15,053 INFO L225 Difference]: With dead ends: 33 [2024-11-28 05:08:15,053 INFO L226 Difference]: Without dead ends: 33 [2024-11-28 05:08:15,054 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:08:15,056 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:15,057 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 84 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:08:15,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-28 05:08:15,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2024-11-28 05:08:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.28) internal successors, (32), 27 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) [2024-11-28 05:08:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-28 05:08:15,065 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2024-11-28 05:08:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:15,065 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-28 05:08:15,065 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) [2024-11-28 05:08:15,066 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-28 05:08:15,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-28 05:08:15,066 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:15,066 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:15,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 05:08:15,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 05:08:15,267 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:15,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:15,268 INFO L85 PathProgramCache]: Analyzing trace with hash 349205664, now seen corresponding path program 1 times [2024-11-28 05:08:15,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:15,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852337629] [2024-11-28 05:08:15,269 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:15,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:15,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:15,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852337629] [2024-11-28 05:08:15,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852337629] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:15,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:15,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 05:08:15,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114555394] [2024-11-28 05:08:15,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:15,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:08:15,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:15,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:08:15,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:08:15,608 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:15,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:15,688 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2024-11-28 05:08:15,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:08:15,688 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2024-11-28 05:08:15,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:15,689 INFO L225 Difference]: With dead ends: 37 [2024-11-28 05:08:15,689 INFO L226 Difference]: Without dead ends: 37 [2024-11-28 05:08:15,689 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:08:15,690 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:15,690 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:15,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-28 05:08:15,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-28 05:08:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2024-11-28 05:08:15,695 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 15 [2024-11-28 05:08:15,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:15,695 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2024-11-28 05:08:15,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:15,696 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2024-11-28 05:08:15,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-28 05:08:15,696 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:15,696 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:15,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 05:08:15,697 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:15,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:15,697 INFO L85 PathProgramCache]: Analyzing trace with hash 607371102, now seen corresponding path program 1 times [2024-11-28 05:08:15,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:15,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579834624] [2024-11-28 05:08:15,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:15,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:16,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:16,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579834624] [2024-11-28 05:08:16,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579834624] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:16,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:16,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 05:08:16,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873728979] [2024-11-28 05:08:16,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:16,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:08:16,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:16,040 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:08:16,040 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:08:16,040 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:16,130 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2024-11-28 05:08:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:08:16,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2024-11-28 05:08:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:16,131 INFO L225 Difference]: With dead ends: 53 [2024-11-28 05:08:16,132 INFO L226 Difference]: Without dead ends: 53 [2024-11-28 05:08:16,132 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:08:16,133 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 101 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 [2024-11-28 05:08:16,133 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 101 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:16,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-28 05:08:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2024-11-28 05:08:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-11-28 05:08:16,137 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 15 [2024-11-28 05:08:16,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:16,138 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-11-28 05:08:16,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:16,138 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-11-28 05:08:16,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-28 05:08:16,139 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:16,139 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:16,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 05:08:16,140 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:16,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:16,140 INFO L85 PathProgramCache]: Analyzing trace with hash 20565088, now seen corresponding path program 1 times [2024-11-28 05:08:16,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:16,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393827346] [2024-11-28 05:08:16,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:16,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:16,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:16,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393827346] [2024-11-28 05:08:16,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393827346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:16,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:16,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 05:08:16,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135575457] [2024-11-28 05:08:16,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:16,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:08:16,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:16,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:08:16,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:08:16,490 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:16,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:16,601 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2024-11-28 05:08:16,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:08:16,601 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2024-11-28 05:08:16,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:16,602 INFO L225 Difference]: With dead ends: 46 [2024-11-28 05:08:16,602 INFO L226 Difference]: Without dead ends: 46 [2024-11-28 05:08:16,602 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:08:16,603 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:16,603 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 84 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-28 05:08:16,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-11-28 05:08:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-11-28 05:08:16,607 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 15 [2024-11-28 05:08:16,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:16,607 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-11-28 05:08:16,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-11-28 05:08:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 05:08:16,608 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:16,608 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:16,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 05:08:16,609 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:16,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:16,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2059450816, now seen corresponding path program 1 times [2024-11-28 05:08:16,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:16,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529428894] [2024-11-28 05:08:16,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:16,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:16,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:16,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529428894] [2024-11-28 05:08:16,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529428894] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:16,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:16,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:08:16,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33719715] [2024-11-28 05:08:16,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:16,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:08:16,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:16,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:08:16,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:08:16,773 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:16,798 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-11-28 05:08:16,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:08:16,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-28 05:08:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:16,799 INFO L225 Difference]: With dead ends: 35 [2024-11-28 05:08:16,799 INFO L226 Difference]: Without dead ends: 22 [2024-11-28 05:08:16,800 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 [2024-11-28 05:08:16,800 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:16,801 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:08:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-28 05:08:16,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-28 05:08:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-11-28 05:08:16,803 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2024-11-28 05:08:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:16,804 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-11-28 05:08:16,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-11-28 05:08:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 05:08:16,805 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:16,805 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:16,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 05:08:16,805 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:16,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:16,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1447112839, now seen corresponding path program 1 times [2024-11-28 05:08:16,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:16,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124229867] [2024-11-28 05:08:16,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:16,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:17,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:17,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124229867] [2024-11-28 05:08:17,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124229867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:17,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296411857] [2024-11-28 05:08:17,182 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:17,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:17,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:17,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:17,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:08:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:17,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:08:17,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:17,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:17,734 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 [2024-11-28 05:08:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:17,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296411857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:17,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:17,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-28 05:08:17,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297001242] [2024-11-28 05:08:17,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:17,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:08:17,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:17,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:08:17,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:08:17,788 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:17,989 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-11-28 05:08:17,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:08:17,990 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2024-11-28 05:08:17,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:17,990 INFO L225 Difference]: With dead ends: 28 [2024-11-28 05:08:17,991 INFO L226 Difference]: Without dead ends: 28 [2024-11-28 05:08:17,991 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:08:17,992 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 58 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 [2024-11-28 05:08:17,992 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 58 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:17,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-28 05:08:17,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2024-11-28 05:08:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:17,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-11-28 05:08:17,995 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2024-11-28 05:08:17,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:17,995 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-11-28 05:08:17,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:17,995 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-11-28 05:08:17,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-28 05:08:17,996 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:17,996 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:18,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:08:18,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:18,201 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:18,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:18,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1910825038, now seen corresponding path program 1 times [2024-11-28 05:08:18,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:18,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982727850] [2024-11-28 05:08:18,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:18,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:18,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:18,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982727850] [2024-11-28 05:08:18,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982727850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:18,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700773088] [2024-11-28 05:08:18,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:18,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:18,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:18,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:18,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:08:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:18,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-28 05:08:18,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:18,974 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 [2024-11-28 05:08:18,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:08:18,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 05:08:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:19,583 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:19,970 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:08:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:20,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700773088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:20,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:20,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-11-28 05:08:20,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212565732] [2024-11-28 05:08:20,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:20,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:08:20,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:20,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:08:20,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:08:20,050 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:20,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:20,450 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2024-11-28 05:08:20,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:08:20,451 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 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 20 [2024-11-28 05:08:20,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:20,451 INFO L225 Difference]: With dead ends: 29 [2024-11-28 05:08:20,451 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 05:08:20,452 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:08:20,453 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:20,453 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 72 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:08:20,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 05:08:20,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2024-11-28 05:08:20,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.125) internal successors, (27), 25 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) [2024-11-28 05:08:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2024-11-28 05:08:20,456 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2024-11-28 05:08:20,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:20,456 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2024-11-28 05:08:20,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:20,457 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2024-11-28 05:08:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 05:08:20,457 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:20,457 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:20,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:08:20,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:20,662 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:20,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:20,663 INFO L85 PathProgramCache]: Analyzing trace with hash -107840371, now seen corresponding path program 2 times [2024-11-28 05:08:20,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:20,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562551402] [2024-11-28 05:08:20,664 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:20,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:20,692 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:08:20,692 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:21,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:21,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562551402] [2024-11-28 05:08:21,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562551402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:21,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600456249] [2024-11-28 05:08:21,356 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:21,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:21,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:21,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:21,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:08:21,479 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:08:21,479 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:21,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 05:08:21,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:21,605 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 [2024-11-28 05:08:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:21,682 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:21,716 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 [2024-11-28 05:08:21,719 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 [2024-11-28 05:08:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:21,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600456249] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:21,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:21,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 21 [2024-11-28 05:08:21,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945688821] [2024-11-28 05:08:21,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:21,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:08:21,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:21,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:08:21,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:08:21,818 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:22,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:22,200 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2024-11-28 05:08:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:08:22,201 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-28 05:08:22,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:22,201 INFO L225 Difference]: With dead ends: 44 [2024-11-28 05:08:22,202 INFO L226 Difference]: Without dead ends: 33 [2024-11-28 05:08:22,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:08:22,203 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:22,204 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 130 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:08:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-28 05:08:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2024-11-28 05:08:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 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) [2024-11-28 05:08:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-11-28 05:08:22,206 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 23 [2024-11-28 05:08:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:22,207 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-11-28 05:08:22,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-11-28 05:08:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 05:08:22,208 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:22,208 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:22,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 05:08:22,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:22,409 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:22,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:22,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1453143628, now seen corresponding path program 3 times [2024-11-28 05:08:22,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:22,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804259828] [2024-11-28 05:08:22,410 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:08:22,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:22,440 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:08:22,441 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:22,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:22,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804259828] [2024-11-28 05:08:22,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804259828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:22,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709803004] [2024-11-28 05:08:22,968 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:08:22,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:22,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:22,971 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:22,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:08:23,104 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:08:23,105 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:23,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 05:08:23,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:23,126 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 [2024-11-28 05:08:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:23,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:23,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709803004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:23,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:23,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-11-28 05:08:23,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978480759] [2024-11-28 05:08:23,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:23,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 05:08:23,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:23,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 05:08:23,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-11-28 05:08:23,943 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 25 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:24,203 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2024-11-28 05:08:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:08:24,207 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-28 05:08:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:24,208 INFO L225 Difference]: With dead ends: 33 [2024-11-28 05:08:24,208 INFO L226 Difference]: Without dead ends: 33 [2024-11-28 05:08:24,208 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:08:24,210 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:24,210 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:08:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-28 05:08:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-28 05:08:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 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) [2024-11-28 05:08:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-11-28 05:08:24,215 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2024-11-28 05:08:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:24,216 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-11-28 05:08:24,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:24,216 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-11-28 05:08:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 05:08:24,217 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:24,217 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:24,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:08:24,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:24,417 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:24,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:24,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2097779519, now seen corresponding path program 2 times [2024-11-28 05:08:24,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:24,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086360687] [2024-11-28 05:08:24,418 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:24,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:24,455 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:08:24,457 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:24,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:24,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086360687] [2024-11-28 05:08:24,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086360687] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:24,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025434671] [2024-11-28 05:08:24,999 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:25,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:25,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:25,002 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:25,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:08:25,113 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:08:25,113 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:25,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-28 05:08:25,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:25,185 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 [2024-11-28 05:08:25,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:08:25,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 05:08:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:26,225 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:27,021 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:08:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:27,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025434671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:27,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:27,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 35 [2024-11-28 05:08:27,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091567706] [2024-11-28 05:08:27,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:27,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 05:08:27,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:27,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 05:08:27,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 05:08:27,101 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:28,038 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2024-11-28 05:08:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:08:28,039 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-28 05:08:28,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:28,039 INFO L225 Difference]: With dead ends: 41 [2024-11-28 05:08:28,039 INFO L226 Difference]: Without dead ends: 41 [2024-11-28 05:08:28,041 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=226, Invalid=1666, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 05:08:28,042 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:28,042 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 121 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:08:28,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-28 05:08:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2024-11-28 05:08:28,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-11-28 05:08:28,045 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2024-11-28 05:08:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:28,045 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-11-28 05:08:28,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-11-28 05:08:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 05:08:28,046 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:28,046 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:28,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:08:28,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:28,248 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:28,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:28,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1119467322, now seen corresponding path program 4 times [2024-11-28 05:08:28,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:28,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580959499] [2024-11-28 05:08:28,249 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:08:28,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:28,275 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:08:28,278 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:08:29,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:29,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580959499] [2024-11-28 05:08:29,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580959499] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:29,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651885954] [2024-11-28 05:08:29,231 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:08:29,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:29,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:29,233 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:29,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:08:29,364 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:08:29,364 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:29,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-28 05:08:29,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:29,435 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 [2024-11-28 05:08:31,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:08:31,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 122 [2024-11-28 05:08:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:08:31,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:32,309 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 44 treesize of output 38 [2024-11-28 05:08:32,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 54 [2024-11-28 05:08:32,332 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 [2024-11-28 05:08:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:08:32,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651885954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:32,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:32,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2024-11-28 05:08:32,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034258948] [2024-11-28 05:08:32,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:32,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 05:08:32,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:32,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 05:08:32,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 05:08:32,382 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 37 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:32,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:32,945 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2024-11-28 05:08:32,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:08:32,945 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-28 05:08:32,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:32,946 INFO L225 Difference]: With dead ends: 33 [2024-11-28 05:08:32,946 INFO L226 Difference]: Without dead ends: 33 [2024-11-28 05:08:32,946 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=227, Invalid=1333, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 05:08:32,947 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:32,947 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 120 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:08:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-28 05:08:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-28 05:08:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 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) [2024-11-28 05:08:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-11-28 05:08:32,949 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2024-11-28 05:08:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:32,949 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-11-28 05:08:32,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-11-28 05:08:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 05:08:32,950 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:32,950 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:32,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 05:08:33,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 05:08:33,154 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:33,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:33,155 INFO L85 PathProgramCache]: Analyzing trace with hash 343748603, now seen corresponding path program 3 times [2024-11-28 05:08:33,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:33,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713877844] [2024-11-28 05:08:33,155 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:08:33,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:33,191 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 05:08:33,194 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:33,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:33,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713877844] [2024-11-28 05:08:33,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713877844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:33,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604029194] [2024-11-28 05:08:33,827 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:08:33,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:33,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:33,830 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:33,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:08:33,980 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 05:08:33,980 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:33,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 05:08:33,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:34,100 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 [2024-11-28 05:08:34,237 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 9 treesize of output 3 [2024-11-28 05:08:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:34,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:34,342 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 [2024-11-28 05:08:34,345 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 [2024-11-28 05:08:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:34,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604029194] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:34,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:34,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 30 [2024-11-28 05:08:34,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296565660] [2024-11-28 05:08:34,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:34,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:08:34,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:34,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:08:34,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:08:34,452 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:35,190 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-11-28 05:08:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:08:35,191 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-28 05:08:35,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:35,191 INFO L225 Difference]: With dead ends: 55 [2024-11-28 05:08:35,191 INFO L226 Difference]: Without dead ends: 40 [2024-11-28 05:08:35,192 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=1708, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 05:08:35,193 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:35,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 153 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:08:35,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-28 05:08:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2024-11-28 05:08:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2024-11-28 05:08:35,195 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2024-11-28 05:08:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:35,195 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2024-11-28 05:08:35,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2024-11-28 05:08:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 05:08:35,196 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:35,196 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:35,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:08:35,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 05:08:35,405 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:35,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:35,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2095300276, now seen corresponding path program 4 times [2024-11-28 05:08:35,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:35,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399616467] [2024-11-28 05:08:35,406 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:08:35,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:35,456 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:08:35,456 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:37,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:37,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399616467] [2024-11-28 05:08:37,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399616467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:37,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758866617] [2024-11-28 05:08:37,713 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:08:37,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:37,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:37,715 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:37,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:08:37,845 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:08:37,845 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:37,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-28 05:08:37,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:37,912 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 [2024-11-28 05:08:37,924 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 [2024-11-28 05:08:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:39,294 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:40,345 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:08:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:40,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758866617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:40,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:40,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 12] total 47 [2024-11-28 05:08:40,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282019323] [2024-11-28 05:08:40,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:40,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-28 05:08:40,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:40,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-28 05:08:40,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2092, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 05:08:40,432 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 48 states, 47 states have (on average 2.25531914893617) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:42,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:42,349 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2024-11-28 05:08:42,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:08:42,349 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.25531914893617) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-28 05:08:42,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:42,350 INFO L225 Difference]: With dead ends: 41 [2024-11-28 05:08:42,350 INFO L226 Difference]: Without dead ends: 41 [2024-11-28 05:08:42,351 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=327, Invalid=3333, Unknown=0, NotChecked=0, Total=3660 [2024-11-28 05:08:42,351 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:42,352 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 197 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:08:42,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-28 05:08:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-28 05:08:42,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-11-28 05:08:42,355 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2024-11-28 05:08:42,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:42,355 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-11-28 05:08:42,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.25531914893617) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:42,355 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-11-28 05:08:42,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 05:08:42,356 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:42,356 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:42,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 05:08:42,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 05:08:42,561 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:42,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:42,561 INFO L85 PathProgramCache]: Analyzing trace with hash -759541650, now seen corresponding path program 5 times [2024-11-28 05:08:42,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:42,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823087765] [2024-11-28 05:08:42,562 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:08:42,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:42,611 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:08:42,611 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:43,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:43,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823087765] [2024-11-28 05:08:43,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823087765] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:43,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123848484] [2024-11-28 05:08:43,315 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:08:43,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:43,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:43,318 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:43,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:08:43,495 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:08:43,495 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:43,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-28 05:08:43,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:43,690 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 [2024-11-28 05:08:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:43,988 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:44,029 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 [2024-11-28 05:08:44,032 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 [2024-11-28 05:08:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:44,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123848484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:44,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:44,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 32 [2024-11-28 05:08:44,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584531066] [2024-11-28 05:08:44,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:44,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 05:08:44,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:44,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 05:08:44,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:08:44,160 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 32 states, 32 states have (on average 2.5) internal successors, (80), 32 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) [2024-11-28 05:08:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:45,052 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-11-28 05:08:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:08:45,052 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 32 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) Word has length 40 [2024-11-28 05:08:45,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:45,053 INFO L225 Difference]: With dead ends: 67 [2024-11-28 05:08:45,053 INFO L226 Difference]: Without dead ends: 48 [2024-11-28 05:08:45,054 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=209, Invalid=2241, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 05:08:45,054 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:45,054 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 239 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:08:45,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-28 05:08:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2024-11-28 05:08:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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) [2024-11-28 05:08:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-11-28 05:08:45,057 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2024-11-28 05:08:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:45,058 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-11-28 05:08:45,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 32 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) [2024-11-28 05:08:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-11-28 05:08:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 05:08:45,058 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:45,059 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:45,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 05:08:45,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:45,263 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:45,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:45,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1876486617, now seen corresponding path program 6 times [2024-11-28 05:08:45,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:45,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951738597] [2024-11-28 05:08:45,264 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:08:45,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:45,299 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:08:45,300 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:45,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:45,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951738597] [2024-11-28 05:08:45,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951738597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:45,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28161513] [2024-11-28 05:08:45,981 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:08:45,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:45,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:45,983 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:45,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:08:46,273 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:08:46,274 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:46,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-28 05:08:46,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:46,320 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 [2024-11-28 05:08:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:08:46,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 05:08:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:47,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:48,414 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:08:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:48,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28161513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:48,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:48,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2024-11-28 05:08:48,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814156566] [2024-11-28 05:08:48,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:48,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 05:08:48,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:48,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 05:08:48,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1753, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 05:08:48,471 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 45 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 45 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:49,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:49,321 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2024-11-28 05:08:49,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:08:49,321 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 45 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-28 05:08:49,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:49,322 INFO L225 Difference]: With dead ends: 56 [2024-11-28 05:08:49,322 INFO L226 Difference]: Without dead ends: 56 [2024-11-28 05:08:49,323 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 05:08:49,324 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:49,324 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 189 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:08:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-28 05:08:49,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2024-11-28 05:08:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 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) [2024-11-28 05:08:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2024-11-28 05:08:49,327 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2024-11-28 05:08:49,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:49,327 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2024-11-28 05:08:49,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 45 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:49,328 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2024-11-28 05:08:49,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 05:08:49,328 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:49,329 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:49,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 05:08:49,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 05:08:49,533 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:49,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:49,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1557050977, now seen corresponding path program 7 times [2024-11-28 05:08:49,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:49,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381098517] [2024-11-28 05:08:49,534 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:08:49,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 41 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:50,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:50,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381098517] [2024-11-28 05:08:50,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381098517] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:50,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537119557] [2024-11-28 05:08:50,407 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:08:50,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:50,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:50,409 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:50,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:08:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:50,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-28 05:08:50,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:50,779 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 [2024-11-28 05:08:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:51,093 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:51,142 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 [2024-11-28 05:08:51,145 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 [2024-11-28 05:08:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:51,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537119557] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:51,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:51,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 35 [2024-11-28 05:08:51,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88923382] [2024-11-28 05:08:51,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:51,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 05:08:51,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:51,261 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 05:08:51,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1100, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 05:08:51,262 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 35 states, 35 states have (on average 2.742857142857143) internal successors, (96), 35 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) [2024-11-28 05:08:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:52,144 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2024-11-28 05:08:52,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 05:08:52,144 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.742857142857143) internal successors, (96), 35 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) Word has length 48 [2024-11-28 05:08:52,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:52,145 INFO L225 Difference]: With dead ends: 79 [2024-11-28 05:08:52,145 INFO L226 Difference]: Without dead ends: 56 [2024-11-28 05:08:52,146 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=216, Invalid=2540, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 05:08:52,146 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:52,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 315 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:08:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-28 05:08:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2024-11-28 05:08:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 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) [2024-11-28 05:08:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2024-11-28 05:08:52,149 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 48 [2024-11-28 05:08:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:52,149 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2024-11-28 05:08:52,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.742857142857143) internal successors, (96), 35 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) [2024-11-28 05:08:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2024-11-28 05:08:52,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 05:08:52,150 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:52,150 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:52,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:08:52,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 05:08:52,354 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:52,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:52,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1122323686, now seen corresponding path program 8 times [2024-11-28 05:08:52,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:52,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988531364] [2024-11-28 05:08:52,355 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:52,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:52,420 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:08:52,420 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:53,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:53,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988531364] [2024-11-28 05:08:53,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988531364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:53,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329907947] [2024-11-28 05:08:53,446 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:53,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:53,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:53,447 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:53,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:08:53,577 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:08:53,577 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:53,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-28 05:08:53,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:53,635 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 [2024-11-28 05:08:53,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:08:53,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 05:08:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:55,131 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:56,154 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:08:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:56,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329907947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:56,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:56,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 54 [2024-11-28 05:08:56,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486909355] [2024-11-28 05:08:56,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:56,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-28 05:08:56,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:56,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-28 05:08:56,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2673, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 05:08:56,219 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 55 states, 54 states have (on average 2.8518518518518516) internal successors, (154), 55 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:57,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:57,404 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2024-11-28 05:08:57,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:08:57,405 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.8518518518518516) internal successors, (154), 55 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-28 05:08:57,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:57,405 INFO L225 Difference]: With dead ends: 64 [2024-11-28 05:08:57,405 INFO L226 Difference]: Without dead ends: 64 [2024-11-28 05:08:57,406 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=408, Invalid=3752, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 05:08:57,407 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:57,407 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 322 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:08:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-28 05:08:57,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2024-11-28 05:08:57,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-11-28 05:08:57,410 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2024-11-28 05:08:57,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:57,410 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-11-28 05:08:57,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.8518518518518516) internal successors, (154), 55 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:08:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-11-28 05:08:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 05:08:57,411 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:57,411 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:57,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 05:08:57,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:57,612 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:08:57,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:57,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2079629780, now seen corresponding path program 9 times [2024-11-28 05:08:57,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:57,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595523385] [2024-11-28 05:08:57,613 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:08:57,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:57,669 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 05:08:57,669 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 61 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:58,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:58,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595523385] [2024-11-28 05:08:58,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595523385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:58,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284301351] [2024-11-28 05:08:58,712 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:08:58,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:58,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:58,714 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:58,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:08:59,017 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 05:08:59,017 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:59,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-28 05:08:59,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:59,223 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 [2024-11-28 05:08:59,502 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 [2024-11-28 05:08:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 18 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:59,534 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:59,617 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 [2024-11-28 05:08:59,619 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 [2024-11-28 05:08:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 18 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:59,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284301351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:59,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:59,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 44 [2024-11-28 05:08:59,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073206337] [2024-11-28 05:08:59,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:59,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 05:08:59,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:59,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 05:08:59,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1754, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 05:08:59,734 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:01,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:01,242 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2024-11-28 05:09:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:09:01,243 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 states have internal predecessors, (114), 0 states have call successors, (0), 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 56 [2024-11-28 05:09:01,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:01,243 INFO L225 Difference]: With dead ends: 91 [2024-11-28 05:09:01,243 INFO L226 Difference]: Without dead ends: 64 [2024-11-28 05:09:01,244 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=330, Invalid=4226, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 05:09:01,245 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:01,245 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 417 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:09:01,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-28 05:09:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2024-11-28 05:09:01,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2024-11-28 05:09:01,248 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2024-11-28 05:09:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:01,248 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2024-11-28 05:09:01,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2024-11-28 05:09:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-28 05:09:01,249 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:01,249 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:01,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 05:09:01,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:01,450 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:09:01,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:01,451 INFO L85 PathProgramCache]: Analyzing trace with hash -470231667, now seen corresponding path program 10 times [2024-11-28 05:09:01,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:01,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796053430] [2024-11-28 05:09:01,451 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:09:01,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:01,498 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:09:01,499 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 45 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:02,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:02,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796053430] [2024-11-28 05:09:02,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796053430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:02,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388682809] [2024-11-28 05:09:02,847 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:09:02,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:02,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:02,849 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:02,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:09:03,066 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:09:03,066 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:03,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-11-28 05:09:03,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:03,115 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 [2024-11-28 05:09:03,140 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 [2024-11-28 05:09:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 45 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:04,875 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:06,163 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:09:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:06,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388682809] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:06,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:06,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 18] total 56 [2024-11-28 05:09:06,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258952896] [2024-11-28 05:09:06,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:06,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-28 05:09:06,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:06,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-28 05:09:06,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=2916, Unknown=0, NotChecked=0, Total=3192 [2024-11-28 05:09:06,252 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 57 states, 56 states have (on average 3.1785714285714284) internal successors, (178), 57 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:08,103 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2024-11-28 05:09:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 05:09:08,104 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.1785714285714284) internal successors, (178), 57 states have internal predecessors, (178), 0 states have call successors, (0), 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 60 [2024-11-28 05:09:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:08,104 INFO L225 Difference]: With dead ends: 65 [2024-11-28 05:09:08,104 INFO L226 Difference]: Without dead ends: 65 [2024-11-28 05:09:08,106 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=507, Invalid=4749, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 05:09:08,107 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:08,107 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 355 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 05:09:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-28 05:09:08,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-28 05:09:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:08,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2024-11-28 05:09:08,113 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2024-11-28 05:09:08,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:08,113 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2024-11-28 05:09:08,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.1785714285714284) internal successors, (178), 57 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2024-11-28 05:09:08,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 05:09:08,114 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:08,115 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:08,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 05:09:08,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-28 05:09:08,315 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:09:08,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:08,316 INFO L85 PathProgramCache]: Analyzing trace with hash -381267257, now seen corresponding path program 11 times [2024-11-28 05:09:08,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:08,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389210689] [2024-11-28 05:09:08,316 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:09:08,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:08,368 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 05:09:08,368 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 77 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:09,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:09,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389210689] [2024-11-28 05:09:09,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389210689] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:09,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593566577] [2024-11-28 05:09:09,653 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:09:09,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:09,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:09,656 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:09,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:09:10,160 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 05:09:10,161 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:10,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-28 05:09:10,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:10,480 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 [2024-11-28 05:09:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:11,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:11,102 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 [2024-11-28 05:09:11,106 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 [2024-11-28 05:09:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:11,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593566577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:11,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:11,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 45 [2024-11-28 05:09:11,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827320718] [2024-11-28 05:09:11,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:11,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 05:09:11,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:11,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 05:09:11,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1854, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 05:09:11,297 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 45 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:13,549 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2024-11-28 05:09:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 05:09:13,550 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 45 states have internal predecessors, (128), 0 states have call successors, (0), 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 64 [2024-11-28 05:09:13,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:13,550 INFO L225 Difference]: With dead ends: 103 [2024-11-28 05:09:13,550 INFO L226 Difference]: Without dead ends: 72 [2024-11-28 05:09:13,552 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=390, Invalid=5160, Unknown=0, NotChecked=0, Total=5550 [2024-11-28 05:09:13,553 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:13,553 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 496 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 05:09:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-28 05:09:13,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2024-11-28 05:09:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 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) [2024-11-28 05:09:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-11-28 05:09:13,556 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2024-11-28 05:09:13,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:13,556 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-11-28 05:09:13,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 45 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:13,557 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-11-28 05:09:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-28 05:09:13,557 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:13,558 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:13,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 05:09:13,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 05:09:13,758 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:09:13,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:13,759 INFO L85 PathProgramCache]: Analyzing trace with hash -723796608, now seen corresponding path program 12 times [2024-11-28 05:09:13,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:13,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553410016] [2024-11-28 05:09:13,759 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:09:13,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:13,819 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 05:09:13,820 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 45 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:14,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:14,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553410016] [2024-11-28 05:09:14,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553410016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:14,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899391174] [2024-11-28 05:09:14,863 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:09:14,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:14,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:14,866 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:14,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 05:09:15,456 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 05:09:15,456 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:15,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 143 conjuncts are in the unsatisfiable core [2024-11-28 05:09:15,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:15,518 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 [2024-11-28 05:09:15,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:09:15,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 05:09:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:17,536 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:19,102 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:09:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:19,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899391174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:19,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:19,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 66 [2024-11-28 05:09:19,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925616410] [2024-11-28 05:09:19,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:19,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-28 05:09:19,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:19,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-28 05:09:19,193 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=3960, Unknown=0, NotChecked=0, Total=4422 [2024-11-28 05:09:19,195 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 67 states, 66 states have (on average 3.0606060606060606) internal successors, (202), 67 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) [2024-11-28 05:09:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:21,087 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2024-11-28 05:09:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 05:09:21,088 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.0606060606060606) internal successors, (202), 67 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 68 [2024-11-28 05:09:21,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:21,089 INFO L225 Difference]: With dead ends: 80 [2024-11-28 05:09:21,089 INFO L226 Difference]: Without dead ends: 80 [2024-11-28 05:09:21,090 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=678, Invalid=5802, Unknown=0, NotChecked=0, Total=6480 [2024-11-28 05:09:21,090 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:21,090 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 372 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 05:09:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-28 05:09:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2024-11-28 05:09:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 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) [2024-11-28 05:09:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2024-11-28 05:09:21,093 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2024-11-28 05:09:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:21,093 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2024-11-28 05:09:21,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.0606060606060606) internal successors, (202), 67 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) [2024-11-28 05:09:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2024-11-28 05:09:21,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-28 05:09:21,094 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:21,094 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:21,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 05:09:21,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-28 05:09:21,295 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:09:21,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:21,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1572735290, now seen corresponding path program 13 times [2024-11-28 05:09:21,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:21,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013696237] [2024-11-28 05:09:21,295 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:09:21,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:22,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:22,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013696237] [2024-11-28 05:09:22,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013696237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:22,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898713358] [2024-11-28 05:09:22,661 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:09:22,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:22,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:22,663 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:22,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 05:09:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:22,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-28 05:09:22,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:23,246 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 [2024-11-28 05:09:23,764 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 9 treesize of output 3 [2024-11-28 05:09:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 24 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:23,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:23,899 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 [2024-11-28 05:09:23,902 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 [2024-11-28 05:09:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 24 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:24,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898713358] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:24,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:24,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 48 [2024-11-28 05:09:24,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077309948] [2024-11-28 05:09:24,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:24,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-28 05:09:24,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:24,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-28 05:09:24,043 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2121, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 05:09:24,044 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 48 states, 48 states have (on average 3.0416666666666665) internal successors, (146), 48 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:26,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:26,222 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2024-11-28 05:09:26,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 05:09:26,223 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0416666666666665) internal successors, (146), 48 states have internal predecessors, (146), 0 states have call successors, (0), 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 [2024-11-28 05:09:26,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:26,224 INFO L225 Difference]: With dead ends: 115 [2024-11-28 05:09:26,224 INFO L226 Difference]: Without dead ends: 80 [2024-11-28 05:09:26,225 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=364, Invalid=5186, Unknown=0, NotChecked=0, Total=5550 [2024-11-28 05:09:26,225 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:26,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 584 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 05:09:26,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-28 05:09:26,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2024-11-28 05:09:26,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2024-11-28 05:09:26,230 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 72 [2024-11-28 05:09:26,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:26,231 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2024-11-28 05:09:26,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0416666666666665) internal successors, (146), 48 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:26,231 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2024-11-28 05:09:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-28 05:09:26,232 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:26,232 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:26,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 05:09:26,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:26,433 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:09:26,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:26,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1606265587, now seen corresponding path program 14 times [2024-11-28 05:09:26,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:26,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901488685] [2024-11-28 05:09:26,434 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:09:26,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:26,468 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:09:26,468 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 66 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:27,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:27,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901488685] [2024-11-28 05:09:27,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901488685] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:27,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079935429] [2024-11-28 05:09:27,847 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:09:27,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:27,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:27,849 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:27,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 05:09:28,067 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:09:28,067 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:28,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-11-28 05:09:28,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:28,135 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 [2024-11-28 05:09:28,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:09:28,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 05:09:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:30,527 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:32,499 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:09:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:32,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079935429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:32,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:32,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 72 [2024-11-28 05:09:32,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659479378] [2024-11-28 05:09:32,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:32,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-28 05:09:32,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:32,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-28 05:09:32,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=4770, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 05:09:32,584 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 73 states, 72 states have (on average 3.138888888888889) internal successors, (226), 73 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:34,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:34,740 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2024-11-28 05:09:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 05:09:34,741 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 3.138888888888889) internal successors, (226), 73 states have internal predecessors, (226), 0 states have call successors, (0), 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 [2024-11-28 05:09:34,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:34,741 INFO L225 Difference]: With dead ends: 88 [2024-11-28 05:09:34,741 INFO L226 Difference]: Without dead ends: 88 [2024-11-28 05:09:34,742 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=693, Invalid=7139, Unknown=0, NotChecked=0, Total=7832 [2024-11-28 05:09:34,743 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:34,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 532 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 05:09:34,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-28 05:09:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2024-11-28 05:09:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2024-11-28 05:09:34,746 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2024-11-28 05:09:34,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:34,746 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2024-11-28 05:09:34,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 3.138888888888889) internal successors, (226), 73 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2024-11-28 05:09:34,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 05:09:34,747 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:34,747 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:34,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 05:09:34,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 05:09:34,951 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:09:34,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:34,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1573518035, now seen corresponding path program 15 times [2024-11-28 05:09:34,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:34,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004702490] [2024-11-28 05:09:34,951 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:09:34,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:35,016 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 05:09:35,017 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 145 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:36,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:36,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004702490] [2024-11-28 05:09:36,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004702490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:36,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244416] [2024-11-28 05:09:36,898 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:09:36,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:36,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:36,900 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:36,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 05:09:37,762 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 05:09:37,763 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:37,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-11-28 05:09:37,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:38,414 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 [2024-11-28 05:09:39,234 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 [2024-11-28 05:09:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 27 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:39,292 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:40,052 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 [2024-11-28 05:09:40,054 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 [2024-11-28 05:09:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 27 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:40,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244416] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:40,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:40,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 25, 25] total 78 [2024-11-28 05:09:40,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034073767] [2024-11-28 05:09:40,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:40,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-28 05:09:40,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:40,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-28 05:09:40,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=5719, Unknown=0, NotChecked=0, Total=6006 [2024-11-28 05:09:40,817 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 78 states, 78 states have (on average 2.8974358974358974) internal successors, (226), 78 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:44,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:44,876 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2024-11-28 05:09:44,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 05:09:44,877 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.8974358974358974) internal successors, (226), 78 states have internal predecessors, (226), 0 states have call successors, (0), 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 80 [2024-11-28 05:09:44,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:44,878 INFO L225 Difference]: With dead ends: 127 [2024-11-28 05:09:44,878 INFO L226 Difference]: Without dead ends: 88 [2024-11-28 05:09:44,879 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=678, Invalid=12432, Unknown=0, NotChecked=0, Total=13110 [2024-11-28 05:09:44,880 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 2803 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 2825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:44,880 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 957 Invalid, 2825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2803 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 05:09:44,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-28 05:09:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2024-11-28 05:09:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2024-11-28 05:09:44,883 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2024-11-28 05:09:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:44,884 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2024-11-28 05:09:44,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.8974358974358974) internal successors, (226), 78 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:44,884 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2024-11-28 05:09:44,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-28 05:09:44,885 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:44,885 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:44,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 05:09:45,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 05:09:45,086 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:09:45,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1685642726, now seen corresponding path program 16 times [2024-11-28 05:09:45,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:45,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17630828] [2024-11-28 05:09:45,086 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:09:45,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:45,162 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:09:45,162 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 120 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:46,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:46,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17630828] [2024-11-28 05:09:46,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17630828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:46,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561884189] [2024-11-28 05:09:46,763 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:09:46,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:46,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:46,765 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:46,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 05:09:47,327 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:09:47,328 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:47,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 181 conjuncts are in the unsatisfiable core [2024-11-28 05:09:47,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:47,413 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 [2024-11-28 05:09:47,417 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 [2024-11-28 05:09:47,441 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 [2024-11-28 05:09:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 120 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:50,377 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:52,350 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:09:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:52,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561884189] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:52,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:52,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24, 24] total 73 [2024-11-28 05:09:52,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073519297] [2024-11-28 05:09:52,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:52,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-28 05:09:52,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:52,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-28 05:09:52,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=4872, Unknown=0, NotChecked=0, Total=5402 [2024-11-28 05:09:52,459 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 74 states, 73 states have (on average 3.4246575342465753) internal successors, (250), 74 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:54,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:54,224 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2024-11-28 05:09:54,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 05:09:54,225 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 3.4246575342465753) internal successors, (250), 74 states have internal predecessors, (250), 0 states have call successors, (0), 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 84 [2024-11-28 05:09:54,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:54,225 INFO L225 Difference]: With dead ends: 89 [2024-11-28 05:09:54,226 INFO L226 Difference]: Without dead ends: 89 [2024-11-28 05:09:54,226 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=641, Invalid=6165, Unknown=0, NotChecked=0, Total=6806 [2024-11-28 05:09:54,226 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:54,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 603 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 05:09:54,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-28 05:09:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-11-28 05:09:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2024-11-28 05:09:54,231 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2024-11-28 05:09:54,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:54,231 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2024-11-28 05:09:54,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 3.4246575342465753) internal successors, (250), 74 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:54,232 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2024-11-28 05:09:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-28 05:09:54,232 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:54,232 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:54,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 05:09:54,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 05:09:54,433 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:09:54,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:54,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1620539744, now seen corresponding path program 17 times [2024-11-28 05:09:54,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:54,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094282426] [2024-11-28 05:09:54,433 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:09:54,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:54,503 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 05:09:54,504 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 161 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:56,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:56,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094282426] [2024-11-28 05:09:56,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094282426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:56,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530236781] [2024-11-28 05:09:56,375 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:09:56,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:56,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:56,377 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:56,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 05:09:58,327 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 05:09:58,327 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:58,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-28 05:09:58,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:58,828 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 [2024-11-28 05:09:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 30 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:59,577 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:59,660 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 [2024-11-28 05:09:59,662 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 [2024-11-28 05:09:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 30 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:59,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530236781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:59,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:59,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 27] total 58 [2024-11-28 05:09:59,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348427674] [2024-11-28 05:09:59,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:59,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-28 05:09:59,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:59,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-28 05:09:59,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3126, Unknown=0, NotChecked=0, Total=3306 [2024-11-28 05:09:59,867 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 58 states, 58 states have (on average 3.0344827586206895) internal successors, (176), 58 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:10:03,500 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2024-11-28 05:10:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 05:10:03,501 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.0344827586206895) internal successors, (176), 58 states have internal predecessors, (176), 0 states have call successors, (0), 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 88 [2024-11-28 05:10:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:10:03,502 INFO L225 Difference]: With dead ends: 139 [2024-11-28 05:10:03,502 INFO L226 Difference]: Without dead ends: 96 [2024-11-28 05:10:03,502 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=623, Invalid=9277, Unknown=0, NotChecked=0, Total=9900 [2024-11-28 05:10:03,503 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 2617 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:10:03,503 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 882 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2617 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 05:10:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-28 05:10:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2024-11-28 05:10:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 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) [2024-11-28 05:10:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2024-11-28 05:10:03,506 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 88 [2024-11-28 05:10:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:10:03,506 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2024-11-28 05:10:03,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.0344827586206895) internal successors, (176), 58 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2024-11-28 05:10:03,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-28 05:10:03,507 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:10:03,507 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:03,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 05:10:03,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 05:10:03,708 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:10:03,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:03,709 INFO L85 PathProgramCache]: Analyzing trace with hash -490236327, now seen corresponding path program 18 times [2024-11-28 05:10:03,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:03,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497147330] [2024-11-28 05:10:03,709 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:10:03,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:03,794 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 05:10:03,795 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 120 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:05,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:05,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497147330] [2024-11-28 05:10:05,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497147330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:05,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111984891] [2024-11-28 05:10:05,484 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:10:05,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:05,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:05,487 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:05,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 05:10:07,755 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 05:10:07,755 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:07,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 189 conjuncts are in the unsatisfiable core [2024-11-28 05:10:07,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:07,818 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 [2024-11-28 05:10:07,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:10:07,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 05:10:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:10,759 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:13,068 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:10:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:13,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111984891] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:13,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:13,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 84 [2024-11-28 05:10:13,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085933424] [2024-11-28 05:10:13,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:13,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-28 05:10:13,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:13,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-28 05:10:13,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=6391, Unknown=0, NotChecked=0, Total=7140 [2024-11-28 05:10:13,176 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 85 states, 84 states have (on average 3.261904761904762) internal successors, (274), 85 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:16,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:10:16,559 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2024-11-28 05:10:16,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-28 05:10:16,560 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 3.261904761904762) internal successors, (274), 85 states have internal predecessors, (274), 0 states have call successors, (0), 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 92 [2024-11-28 05:10:16,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:10:16,561 INFO L225 Difference]: With dead ends: 104 [2024-11-28 05:10:16,561 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 05:10:16,562 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3539 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1113, Invalid=9807, Unknown=0, NotChecked=0, Total=10920 [2024-11-28 05:10:16,562 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 2610 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:10:16,563 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 800 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2610 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-28 05:10:16,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 05:10:16,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2024-11-28 05:10:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2024-11-28 05:10:16,570 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2024-11-28 05:10:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:10:16,570 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2024-11-28 05:10:16,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 3.261904761904762) internal successors, (274), 85 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2024-11-28 05:10:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-28 05:10:16,572 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:10:16,572 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:16,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 05:10:16,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 05:10:16,773 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:10:16,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:16,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1844432275, now seen corresponding path program 19 times [2024-11-28 05:10:16,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:16,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791575918] [2024-11-28 05:10:16,773 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:10:16,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:10:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 221 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:18,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:18,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791575918] [2024-11-28 05:10:18,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791575918] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:18,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963439719] [2024-11-28 05:10:18,699 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:10:18,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:18,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:18,701 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:18,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 05:10:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:10:18,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-28 05:10:18,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:19,540 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 [2024-11-28 05:10:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 33 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:20,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:20,474 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 [2024-11-28 05:10:20,477 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 [2024-11-28 05:10:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 33 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:20,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963439719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:20,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:20,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 59 [2024-11-28 05:10:20,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121595080] [2024-11-28 05:10:20,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:20,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-28 05:10:20,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:20,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-28 05:10:20,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3239, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 05:10:20,725 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 59 states, 59 states have (on average 3.2542372881355934) internal successors, (192), 59 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:10:24,555 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2024-11-28 05:10:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 05:10:24,556 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.2542372881355934) internal successors, (192), 59 states have internal predecessors, (192), 0 states have call successors, (0), 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 96 [2024-11-28 05:10:24,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:10:24,557 INFO L225 Difference]: With dead ends: 151 [2024-11-28 05:10:24,557 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 05:10:24,557 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=540, Invalid=8390, Unknown=0, NotChecked=0, Total=8930 [2024-11-28 05:10:24,557 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 29 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 2927 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 2956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:10:24,558 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 982 Invalid, 2956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2927 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 05:10:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 05:10:24,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2024-11-28 05:10:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:24,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2024-11-28 05:10:24,563 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 96 [2024-11-28 05:10:24,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:10:24,564 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2024-11-28 05:10:24,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.2542372881355934) internal successors, (192), 59 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:24,564 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2024-11-28 05:10:24,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-28 05:10:24,564 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:10:24,565 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:24,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 05:10:24,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-28 05:10:24,765 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:10:24,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:24,766 INFO L85 PathProgramCache]: Analyzing trace with hash 172233804, now seen corresponding path program 20 times [2024-11-28 05:10:24,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:24,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34958717] [2024-11-28 05:10:24,766 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:10:24,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:24,806 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:10:24,806 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 153 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:27,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:27,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34958717] [2024-11-28 05:10:27,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34958717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:27,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113868029] [2024-11-28 05:10:27,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:10:27,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:27,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:27,065 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:27,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 05:10:27,392 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:10:27,392 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:27,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 178 conjuncts are in the unsatisfiable core [2024-11-28 05:10:27,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:27,459 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 [2024-11-28 05:10:27,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:10:27,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 05:10:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 190 proven. 294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:29,442 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:32,121 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:10:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 231 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:32,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113868029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:32,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:32,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 84 [2024-11-28 05:10:32,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386143719] [2024-11-28 05:10:32,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:32,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-28 05:10:32,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:32,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-28 05:10:32,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=6637, Unknown=0, NotChecked=0, Total=7140 [2024-11-28 05:10:32,233 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 85 states, 84 states have (on average 3.5476190476190474) internal successors, (298), 85 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) [2024-11-28 05:10:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:10:35,641 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2024-11-28 05:10:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 05:10:35,642 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 3.5476190476190474) internal successors, (298), 85 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 100 [2024-11-28 05:10:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:10:35,643 INFO L225 Difference]: With dead ends: 105 [2024-11-28 05:10:35,643 INFO L226 Difference]: Without dead ends: 105 [2024-11-28 05:10:35,644 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2950 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=965, Invalid=11025, Unknown=0, NotChecked=0, Total=11990 [2024-11-28 05:10:35,644 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 2973 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:10:35,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 916 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2973 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-28 05:10:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-28 05:10:35,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-11-28 05:10:35,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2024-11-28 05:10:35,652 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2024-11-28 05:10:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:10:35,653 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2024-11-28 05:10:35,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 3.5476190476190474) internal successors, (298), 85 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) [2024-11-28 05:10:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2024-11-28 05:10:35,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-28 05:10:35,654 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:10:35,654 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:35,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 05:10:35,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-28 05:10:35,855 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:10:35,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:35,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1715870214, now seen corresponding path program 21 times [2024-11-28 05:10:35,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:35,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173487295] [2024-11-28 05:10:35,856 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:10:35,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:35,945 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 05:10:35,945 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 288 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:38,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:38,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173487295] [2024-11-28 05:10:38,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173487295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:38,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059164086] [2024-11-28 05:10:38,719 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:10:38,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:38,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:38,723 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:38,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 05:10:41,891 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 05:10:41,892 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:41,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-11-28 05:10:41,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:42,512 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 [2024-11-28 05:10:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 36 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:43,436 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:43,536 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 [2024-11-28 05:10:43,538 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 [2024-11-28 05:10:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 36 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:43,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059164086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:43,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:43,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 31, 31] total 71 [2024-11-28 05:10:43,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013906485] [2024-11-28 05:10:43,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:43,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-28 05:10:43,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:43,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-28 05:10:43,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=4624, Unknown=0, NotChecked=0, Total=4970 [2024-11-28 05:10:43,755 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 71 states, 71 states have (on average 2.9295774647887325) internal successors, (208), 71 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:10:48,170 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2024-11-28 05:10:48,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-28 05:10:48,171 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.9295774647887325) internal successors, (208), 71 states have internal predecessors, (208), 0 states have call successors, (0), 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 104 [2024-11-28 05:10:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:10:48,171 INFO L225 Difference]: With dead ends: 163 [2024-11-28 05:10:48,171 INFO L226 Difference]: Without dead ends: 112 [2024-11-28 05:10:48,172 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=904, Invalid=12668, Unknown=0, NotChecked=0, Total=13572 [2024-11-28 05:10:48,173 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 28 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 3316 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 3348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:10:48,173 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1105 Invalid, 3348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3316 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-28 05:10:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-28 05:10:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2024-11-28 05:10:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2024-11-28 05:10:48,177 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2024-11-28 05:10:48,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:10:48,177 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2024-11-28 05:10:48,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.9295774647887325) internal successors, (208), 71 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2024-11-28 05:10:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-28 05:10:48,178 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:10:48,178 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:48,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-28 05:10:48,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:48,379 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:10:48,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:48,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1248368575, now seen corresponding path program 22 times [2024-11-28 05:10:48,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:48,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113872204] [2024-11-28 05:10:48,379 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:10:48,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:48,437 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:10:48,437 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 231 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:50,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:50,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113872204] [2024-11-28 05:10:50,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113872204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:50,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757577058] [2024-11-28 05:10:50,713 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:10:50,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:50,715 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:50,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 05:10:51,862 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:10:51,862 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:51,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 208 conjuncts are in the unsatisfiable core [2024-11-28 05:10:51,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:51,925 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 [2024-11-28 05:10:51,935 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 [2024-11-28 05:10:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 231 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:55,350 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:58,421 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:10:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 276 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:10:58,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757577058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:58,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:58,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30, 30] total 91 [2024-11-28 05:10:58,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383287453] [2024-11-28 05:10:58,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:58,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-28 05:10:58,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:58,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-28 05:10:58,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=7551, Unknown=0, NotChecked=0, Total=8372 [2024-11-28 05:10:58,525 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 92 states, 91 states have (on average 3.5384615384615383) internal successors, (322), 92 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:11:02,037 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2024-11-28 05:11:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 05:11:02,038 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 3.5384615384615383) internal successors, (322), 92 states have internal predecessors, (322), 0 states have call successors, (0), 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 [2024-11-28 05:11:02,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:11:02,039 INFO L225 Difference]: With dead ends: 113 [2024-11-28 05:11:02,039 INFO L226 Difference]: Without dead ends: 113 [2024-11-28 05:11:02,040 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3838 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1394, Invalid=12412, Unknown=0, NotChecked=0, Total=13806 [2024-11-28 05:11:02,040 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:11:02,040 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 769 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 05:11:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-28 05:11:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-11-28 05:11:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2024-11-28 05:11:02,045 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2024-11-28 05:11:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:11:02,046 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2024-11-28 05:11:02,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 3.5384615384615383) internal successors, (322), 92 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2024-11-28 05:11:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-28 05:11:02,047 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:02,047 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:02,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 05:11:02,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:02,248 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:11:02,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:02,249 INFO L85 PathProgramCache]: Analyzing trace with hash 818260985, now seen corresponding path program 23 times [2024-11-28 05:11:02,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:02,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975256905] [2024-11-28 05:11:02,249 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:11:02,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:02,327 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-28 05:11:02,327 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 285 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:04,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:04,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975256905] [2024-11-28 05:11:04,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975256905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:04,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754752757] [2024-11-28 05:11:04,513 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:11:04,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:04,515 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:04,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 05:11:09,317 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-28 05:11:09,317 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:09,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-11-28 05:11:09,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:09,963 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 [2024-11-28 05:11:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 39 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:11,000 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:11,090 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 [2024-11-28 05:11:11,092 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 [2024-11-28 05:11:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 39 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:11,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754752757] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:11,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:11,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 33, 33] total 70 [2024-11-28 05:11:11,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064275567] [2024-11-28 05:11:11,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:11,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-28 05:11:11,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:11,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-28 05:11:11,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=4592, Unknown=0, NotChecked=0, Total=4830 [2024-11-28 05:11:11,312 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 70 states, 70 states have (on average 3.2) internal successors, (224), 70 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:11:16,484 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2024-11-28 05:11:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-28 05:11:16,484 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.2) internal successors, (224), 70 states have internal predecessors, (224), 0 states have call successors, (0), 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 [2024-11-28 05:11:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:11:16,485 INFO L225 Difference]: With dead ends: 175 [2024-11-28 05:11:16,485 INFO L226 Difference]: Without dead ends: 120 [2024-11-28 05:11:16,486 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3049 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=890, Invalid=14362, Unknown=0, NotChecked=0, Total=15252 [2024-11-28 05:11:16,486 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 71 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 4031 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 4065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 4031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:11:16,486 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1333 Invalid, 4065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 4031 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-28 05:11:16,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-28 05:11:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-11-28 05:11:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 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) [2024-11-28 05:11:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2024-11-28 05:11:16,490 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 112 [2024-11-28 05:11:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:11:16,490 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2024-11-28 05:11:16,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.2) internal successors, (224), 70 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2024-11-28 05:11:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-28 05:11:16,491 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:16,491 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:16,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 05:11:16,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:16,692 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:11:16,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:16,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1653563570, now seen corresponding path program 24 times [2024-11-28 05:11:16,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:16,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695707361] [2024-11-28 05:11:16,692 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:11:16,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:16,815 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 05:11:16,815 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 231 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:18,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:18,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695707361] [2024-11-28 05:11:18,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695707361] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:18,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636144926] [2024-11-28 05:11:18,466 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:11:18,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:18,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:18,471 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:18,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 05:11:27,901 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 05:11:27,901 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:27,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 286 conjuncts are in the unsatisfiable core [2024-11-28 05:11:27,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:27,973 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 [2024-11-28 05:11:28,005 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 [2024-11-28 05:11:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:32,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:37,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636144926] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:37,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:37,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34, 34] total 104 [2024-11-28 05:11:37,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663081810] [2024-11-28 05:11:37,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:37,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-11-28 05:11:37,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:37,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-11-28 05:11:37,373 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=10127, Unknown=0, NotChecked=0, Total=10920 [2024-11-28 05:11:37,374 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 105 states, 104 states have (on average 3.326923076923077) internal successors, (346), 105 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:44,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:11:44,625 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2024-11-28 05:11:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-28 05:11:44,626 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 3.326923076923077) internal successors, (346), 105 states have internal predecessors, (346), 0 states have call successors, (0), 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 116 [2024-11-28 05:11:44,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:11:44,627 INFO L225 Difference]: With dead ends: 128 [2024-11-28 05:11:44,627 INFO L226 Difference]: Without dead ends: 128 [2024-11-28 05:11:44,628 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4441 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1847, Invalid=20803, Unknown=0, NotChecked=0, Total=22650 [2024-11-28 05:11:44,628 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 3971 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 4011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:11:44,628 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 1220 Invalid, 4011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3971 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 05:11:44,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-28 05:11:44,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2024-11-28 05:11:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2024-11-28 05:11:44,632 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2024-11-28 05:11:44,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:11:44,632 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2024-11-28 05:11:44,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 3.326923076923077) internal successors, (346), 105 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2024-11-28 05:11:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-28 05:11:44,633 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:44,633 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:44,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 05:11:44,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:44,837 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:11:44,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:44,837 INFO L85 PathProgramCache]: Analyzing trace with hash -710360212, now seen corresponding path program 25 times [2024-11-28 05:11:44,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:44,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344208155] [2024-11-28 05:11:44,837 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:11:44,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 365 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:46,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:46,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344208155] [2024-11-28 05:11:46,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344208155] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:46,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644101940] [2024-11-28 05:11:46,947 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:11:46,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:46,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:46,948 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:46,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 05:11:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:47,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 156 conjuncts are in the unsatisfiable core [2024-11-28 05:11:47,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:47,961 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 [2024-11-28 05:11:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 42 proven. 689 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:49,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:49,103 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 [2024-11-28 05:11:49,104 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 [2024-11-28 05:11:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 42 proven. 689 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:49,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644101940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:49,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:49,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 71 [2024-11-28 05:11:49,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302864443] [2024-11-28 05:11:49,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:49,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-28 05:11:49,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:49,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-28 05:11:49,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=4727, Unknown=0, NotChecked=0, Total=4970 [2024-11-28 05:11:49,312 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 71 states, 71 states have (on average 3.380281690140845) internal successors, (240), 71 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) [2024-11-28 05:11:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:11:54,269 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2024-11-28 05:11:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-28 05:11:54,270 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.380281690140845) internal successors, (240), 71 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) Word has length 120 [2024-11-28 05:11:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:11:54,271 INFO L225 Difference]: With dead ends: 187 [2024-11-28 05:11:54,271 INFO L226 Difference]: Without dead ends: 128 [2024-11-28 05:11:54,272 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2290 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=756, Invalid=12584, Unknown=0, NotChecked=0, Total=13340 [2024-11-28 05:11:54,272 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 32 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 4660 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 4699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:11:54,272 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1566 Invalid, 4699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 4660 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-28 05:11:54,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-28 05:11:54,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2024-11-28 05:11:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 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) [2024-11-28 05:11:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2024-11-28 05:11:54,277 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 120 [2024-11-28 05:11:54,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:11:54,277 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2024-11-28 05:11:54,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.380281690140845) internal successors, (240), 71 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) [2024-11-28 05:11:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2024-11-28 05:11:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-28 05:11:54,278 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:54,278 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:54,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 05:11:54,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:54,479 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:11:54,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:54,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1911729957, now seen corresponding path program 26 times [2024-11-28 05:11:54,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:54,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408866014] [2024-11-28 05:11:54,480 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:11:54,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:54,518 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:11:54,518 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 276 proven. 508 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:56,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:56,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408866014] [2024-11-28 05:11:56,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408866014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:56,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625214282] [2024-11-28 05:11:56,402 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:11:56,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:56,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:56,403 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:56,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 05:11:56,783 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:11:56,783 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:56,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 241 conjuncts are in the unsatisfiable core [2024-11-28 05:11:56,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:56,867 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 [2024-11-28 05:11:56,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:11:56,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 05:12:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:00,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:04,304 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:12:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:04,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625214282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:04,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:04,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 108 [2024-11-28 05:12:04,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062638470] [2024-11-28 05:12:04,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:04,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-11-28 05:12:04,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:04,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-11-28 05:12:04,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=10746, Unknown=0, NotChecked=0, Total=11772 [2024-11-28 05:12:04,421 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 109 states, 108 states have (on average 3.425925925925926) internal successors, (370), 109 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:08,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:08,537 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2024-11-28 05:12:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-28 05:12:08,538 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 108 states have (on average 3.425925925925926) internal successors, (370), 109 states have internal predecessors, (370), 0 states have call successors, (0), 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 124 [2024-11-28 05:12:08,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:08,539 INFO L225 Difference]: With dead ends: 136 [2024-11-28 05:12:08,539 INFO L226 Difference]: Without dead ends: 136 [2024-11-28 05:12:08,540 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5630 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1506, Invalid=17126, Unknown=0, NotChecked=0, Total=18632 [2024-11-28 05:12:08,540 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 3877 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 3890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 3877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:08,540 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1176 Invalid, 3890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 3877 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 05:12:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-28 05:12:08,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2024-11-28 05:12:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2024-11-28 05:12:08,544 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2024-11-28 05:12:08,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:08,544 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2024-11-28 05:12:08,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 108 states have (on average 3.425925925925926) internal successors, (370), 109 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:08,545 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2024-11-28 05:12:08,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-28 05:12:08,545 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:08,545 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:08,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 05:12:08,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-28 05:12:08,746 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:12:08,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:08,746 INFO L85 PathProgramCache]: Analyzing trace with hash -855007137, now seen corresponding path program 27 times [2024-11-28 05:12:08,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:08,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280464012] [2024-11-28 05:12:08,747 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:12:08,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:08,850 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-28 05:12:08,850 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 421 proven. 422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:11,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:11,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280464012] [2024-11-28 05:12:11,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280464012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:11,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336656389] [2024-11-28 05:12:11,685 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:12:11,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:11,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:11,687 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:11,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 05:12:20,279 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-28 05:12:20,279 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:20,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 238 conjuncts are in the unsatisfiable core [2024-11-28 05:12:20,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:21,456 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 [2024-11-28 05:12:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 45 proven. 798 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:23,026 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:24,481 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 [2024-11-28 05:12:24,483 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 [2024-11-28 05:12:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 45 proven. 798 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:25,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336656389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:25,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:25,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 37, 37] total 118 [2024-11-28 05:12:25,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916932157] [2024-11-28 05:12:25,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:25,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2024-11-28 05:12:25,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:25,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2024-11-28 05:12:25,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=13255, Unknown=0, NotChecked=0, Total=13806 [2024-11-28 05:12:25,928 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 118 states, 118 states have (on average 3.135593220338983) internal successors, (370), 118 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:34,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:34,837 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2024-11-28 05:12:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-28 05:12:34,838 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.135593220338983) internal successors, (370), 118 states have internal predecessors, (370), 0 states have call successors, (0), 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 128 [2024-11-28 05:12:34,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:34,838 INFO L225 Difference]: With dead ends: 199 [2024-11-28 05:12:34,838 INFO L226 Difference]: Without dead ends: 136 [2024-11-28 05:12:34,839 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6799 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1385, Invalid=29767, Unknown=0, NotChecked=0, Total=31152 [2024-11-28 05:12:34,840 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 2316 mSDsCounter, 0 mSdLazyCounter, 6959 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 7001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 6959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:34,840 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 2351 Invalid, 7001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 6959 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-28 05:12:34,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-28 05:12:34,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2024-11-28 05:12:34,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 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) [2024-11-28 05:12:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2024-11-28 05:12:34,842 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 128 [2024-11-28 05:12:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:34,843 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2024-11-28 05:12:34,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.135593220338983) internal successors, (370), 118 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:34,843 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2024-11-28 05:12:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-28 05:12:34,843 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:34,843 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:34,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:35,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:35,044 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:12:35,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:35,044 INFO L85 PathProgramCache]: Analyzing trace with hash 128762648, now seen corresponding path program 28 times [2024-11-28 05:12:35,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:35,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594572209] [2024-11-28 05:12:35,044 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:12:35,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:35,114 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:12:35,114 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 325 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:37,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:37,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594572209] [2024-11-28 05:12:37,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594572209] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:37,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810964488] [2024-11-28 05:12:37,680 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:12:37,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:37,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:37,682 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:37,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 05:12:40,816 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:12:40,817 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:40,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 251 conjuncts are in the unsatisfiable core [2024-11-28 05:12:40,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:40,904 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 [2024-11-28 05:12:40,920 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 [2024-11-28 05:12:40,935 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 [2024-11-28 05:12:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 378 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:45,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:49,976 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:12:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 435 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:50,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810964488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:50,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:50,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 36, 36] total 109 [2024-11-28 05:12:50,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798990251] [2024-11-28 05:12:50,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:50,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-11-28 05:12:50,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:50,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-11-28 05:12:50,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=974, Invalid=11016, Unknown=0, NotChecked=0, Total=11990 [2024-11-28 05:12:50,128 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 110 states, 109 states have (on average 3.614678899082569) internal successors, (394), 110 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:56,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:56,274 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2024-11-28 05:12:56,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-28 05:12:56,275 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 3.614678899082569) internal successors, (394), 110 states have internal predecessors, (394), 0 states have call successors, (0), 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 132 [2024-11-28 05:12:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:56,276 INFO L225 Difference]: With dead ends: 137 [2024-11-28 05:12:56,276 INFO L226 Difference]: Without dead ends: 137 [2024-11-28 05:12:56,276 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5380 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1775, Invalid=18531, Unknown=0, NotChecked=0, Total=20306 [2024-11-28 05:12:56,277 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 3997 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 3997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:56,277 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1243 Invalid, 3997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3997 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-28 05:12:56,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-28 05:12:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2024-11-28 05:12:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 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) [2024-11-28 05:12:56,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2024-11-28 05:12:56,280 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 132 [2024-11-28 05:12:56,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:56,280 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2024-11-28 05:12:56,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 3.614678899082569) internal successors, (394), 110 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:56,281 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2024-11-28 05:12:56,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-28 05:12:56,281 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:56,281 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:56,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 05:12:56,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-28 05:12:56,482 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:12:56,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:56,482 INFO L85 PathProgramCache]: Analyzing trace with hash 249725650, now seen corresponding path program 29 times [2024-11-28 05:12:56,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:56,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591127600] [2024-11-28 05:12:56,482 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:12:56,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:56,581 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-28 05:12:56,581 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 435 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:59,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:59,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591127600] [2024-11-28 05:12:59,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591127600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:59,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867348152] [2024-11-28 05:12:59,642 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:12:59,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:59,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:59,644 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:59,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 05:13:19,697 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-28 05:13:19,697 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:19,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 174 conjuncts are in the unsatisfiable core [2024-11-28 05:13:19,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:20,684 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 [2024-11-28 05:13:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 48 proven. 915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:13:22,114 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:22,238 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 [2024-11-28 05:13:22,244 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 [2024-11-28 05:13:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 48 proven. 915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:13:22,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867348152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:13:22,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:13:22,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 39, 39] total 83 [2024-11-28 05:13:22,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029708518] [2024-11-28 05:13:22,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:22,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-28 05:13:22,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:22,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-28 05:13:22,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=6493, Unknown=0, NotChecked=0, Total=6806 [2024-11-28 05:13:22,519 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 83 states, 83 states have (on average 3.2771084337349397) internal successors, (272), 83 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:30,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:30,081 INFO L93 Difference]: Finished difference Result 211 states and 212 transitions. [2024-11-28 05:13:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-28 05:13:30,081 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.2771084337349397) internal successors, (272), 83 states have internal predecessors, (272), 0 states have call successors, (0), 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 136 [2024-11-28 05:13:30,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:30,082 INFO L225 Difference]: With dead ends: 211 [2024-11-28 05:13:30,082 INFO L226 Difference]: Without dead ends: 144 [2024-11-28 05:13:30,083 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4516 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1223, Invalid=20829, Unknown=0, NotChecked=0, Total=22052 [2024-11-28 05:13:30,084 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 86 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 5852 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1912 SdHoareTripleChecker+Invalid, 5896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:30,084 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1912 Invalid, 5896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5852 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-28 05:13:30,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-28 05:13:30,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2024-11-28 05:13:30,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2024-11-28 05:13:30,087 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 136 [2024-11-28 05:13:30,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:30,088 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2024-11-28 05:13:30,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.2771084337349397) internal successors, (272), 83 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:30,088 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2024-11-28 05:13:30,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-28 05:13:30,089 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:30,089 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:30,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 05:13:30,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:30,290 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:13:30,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:30,290 INFO L85 PathProgramCache]: Analyzing trace with hash 850910347, now seen corresponding path program 30 times [2024-11-28 05:13:30,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:30,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506634028] [2024-11-28 05:13:30,291 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:13:30,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:30,392 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-28 05:13:30,392 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 378 proven. 646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:13:32,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:32,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506634028] [2024-11-28 05:13:32,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506634028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:32,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285059042] [2024-11-28 05:13:32,633 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:13:32,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:32,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:32,635 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:32,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 05:15:22,588 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-28 05:15:22,588 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:22,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 271 conjuncts are in the unsatisfiable core [2024-11-28 05:15:22,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:22,705 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 [2024-11-28 05:15:22,721 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 [2024-11-28 05:15:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:30,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:36,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285059042] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:15:36,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:15:36,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 124 [2024-11-28 05:15:36,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966342232] [2024-11-28 05:15:36,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:15:36,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2024-11-28 05:15:36,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:36,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2024-11-28 05:15:36,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1572, Invalid=13928, Unknown=0, NotChecked=0, Total=15500 [2024-11-28 05:15:36,532 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 125 states, 124 states have (on average 3.370967741935484) internal successors, (418), 125 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:15:49,301 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2024-11-28 05:15:49,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-11-28 05:15:49,301 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 124 states have (on average 3.370967741935484) internal successors, (418), 125 states have internal predecessors, (418), 0 states have call successors, (0), 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 140 [2024-11-28 05:15:49,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:15:49,302 INFO L225 Difference]: With dead ends: 222 [2024-11-28 05:15:49,302 INFO L226 Difference]: Without dead ends: 222 [2024-11-28 05:15:49,303 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12104 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=4193, Invalid=38449, Unknown=0, NotChecked=0, Total=42642 [2024-11-28 05:15:49,304 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 74 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 4159 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 4206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 4159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:15:49,304 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1243 Invalid, 4206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 4159 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-28 05:15:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-28 05:15:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2024-11-28 05:15:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2024-11-28 05:15:49,307 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2024-11-28 05:15:49,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:15:49,307 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2024-11-28 05:15:49,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 124 states have (on average 3.370967741935484) internal successors, (418), 125 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2024-11-28 05:15:49,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-28 05:15:49,308 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:15:49,308 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:49,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 05:15:49,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:49,509 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:15:49,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:49,510 INFO L85 PathProgramCache]: Analyzing trace with hash 588098245, now seen corresponding path program 31 times [2024-11-28 05:15:49,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:49,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514341275] [2024-11-28 05:15:49,510 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:15:49,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 545 proven. 546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:52,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:52,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514341275] [2024-11-28 05:15:52,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514341275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:52,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658460069] [2024-11-28 05:15:52,639 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:15:52,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:52,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:52,641 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:52,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 05:15:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:53,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 186 conjuncts are in the unsatisfiable core [2024-11-28 05:15:53,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:54,344 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 13 treesize of output 9 [2024-11-28 05:15:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 51 proven. 1040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:56,065 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:56,209 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 [2024-11-28 05:15:56,211 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 [2024-11-28 05:15:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 51 proven. 1040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:15:56,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658460069] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:15:56,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:15:56,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 83 [2024-11-28 05:15:56,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427458774] [2024-11-28 05:15:56,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:15:56,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-28 05:15:56,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:56,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-28 05:15:56,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=6494, Unknown=0, NotChecked=0, Total=6806 [2024-11-28 05:15:56,577 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 83 states, 83 states have (on average 3.4698795180722892) internal successors, (288), 83 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:16:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:16:04,926 INFO L93 Difference]: Finished difference Result 223 states and 224 transitions. [2024-11-28 05:16:04,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-28 05:16:04,927 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.4698795180722892) internal successors, (288), 83 states have internal predecessors, (288), 0 states have call successors, (0), 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 [2024-11-28 05:16:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:16:04,928 INFO L225 Difference]: With dead ends: 223 [2024-11-28 05:16:04,928 INFO L226 Difference]: Without dead ends: 152 [2024-11-28 05:16:04,929 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3226 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1008, Invalid=17624, Unknown=0, NotChecked=0, Total=18632 [2024-11-28 05:16:04,929 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 38 mSDsluCounter, 1971 mSDsCounter, 0 mSdLazyCounter, 6038 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 6086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 6038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:16:04,930 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 2010 Invalid, 6086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 6038 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-28 05:16:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-28 05:16:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2024-11-28 05:16:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:16:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2024-11-28 05:16:04,934 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2024-11-28 05:16:04,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:16:04,934 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2024-11-28 05:16:04,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.4698795180722892) internal successors, (288), 83 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:16:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2024-11-28 05:16:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-28 05:16:04,935 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:16:04,935 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:16:04,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-28 05:16:05,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:16:05,140 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:16:05,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:16:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1846658178, now seen corresponding path program 32 times [2024-11-28 05:16:05,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:16:05,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299637407] [2024-11-28 05:16:05,140 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:16:05,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:16:05,189 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:16:05,189 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:16:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 435 proven. 721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:16:08,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:16:08,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299637407] [2024-11-28 05:16:08,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299637407] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:16:08,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436731440] [2024-11-28 05:16:08,159 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:16:08,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:16:08,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:16:08,161 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:16:08,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 05:16:08,609 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:16:08,609 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:16:08,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 283 conjuncts are in the unsatisfiable core [2024-11-28 05:16:08,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:16:08,683 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 [2024-11-28 05:16:08,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:16:08,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 05:16:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:16:14,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:16:20,426 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:16:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:16:20,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436731440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:16:20,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:16:20,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 126 [2024-11-28 05:16:20,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338072805] [2024-11-28 05:16:20,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:16:20,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2024-11-28 05:16:20,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:16:20,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2024-11-28 05:16:20,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1377, Invalid=14625, Unknown=0, NotChecked=0, Total=16002 [2024-11-28 05:16:20,583 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 127 states, 126 states have (on average 3.507936507936508) internal successors, (442), 127 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:16:27,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:16:27,373 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2024-11-28 05:16:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-28 05:16:27,374 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 126 states have (on average 3.507936507936508) internal successors, (442), 127 states have internal predecessors, (442), 0 states have call successors, (0), 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 [2024-11-28 05:16:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:16:27,375 INFO L225 Difference]: With dead ends: 160 [2024-11-28 05:16:27,375 INFO L226 Difference]: Without dead ends: 160 [2024-11-28 05:16:27,375 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7820 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=2034, Invalid=23726, Unknown=0, NotChecked=0, Total=25760 [2024-11-28 05:16:27,376 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 50 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 5788 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 5804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 5788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:16:27,376 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1776 Invalid, 5804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 5788 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-28 05:16:27,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-28 05:16:27,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 153. [2024-11-28 05:16:27,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:16:27,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2024-11-28 05:16:27,379 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2024-11-28 05:16:27,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:16:27,380 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2024-11-28 05:16:27,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 126 states have (on average 3.507936507936508) internal successors, (442), 127 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:16:27,380 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2024-11-28 05:16:27,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-28 05:16:27,381 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:16:27,381 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:16:27,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-28 05:16:27,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:16:27,582 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:16:27,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:16:27,582 INFO L85 PathProgramCache]: Analyzing trace with hash 826628152, now seen corresponding path program 33 times [2024-11-28 05:16:27,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:16:27,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800673888] [2024-11-28 05:16:27,582 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:16:27,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:16:27,730 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-28 05:16:27,730 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:16:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 613 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:16:32,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:16:32,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800673888] [2024-11-28 05:16:32,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800673888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:16:32,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27994174] [2024-11-28 05:16:32,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:16:32,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:16:32,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:16:32,037 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:16:32,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 05:18:01,861 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-28 05:18:01,862 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:18:01,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 198 conjuncts are in the unsatisfiable core [2024-11-28 05:18:01,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:18:03,250 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 [2024-11-28 05:18:05,137 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 [2024-11-28 05:18:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 54 proven. 1173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:18:05,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:18:05,483 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 [2024-11-28 05:18:05,485 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 [2024-11-28 05:18:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 54 proven. 1173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:18:05,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27994174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:18:05,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:18:05,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 43, 43] total 101 [2024-11-28 05:18:05,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753655662] [2024-11-28 05:18:05,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:18:05,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-28 05:18:05,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:05,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-28 05:18:05,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=9500, Unknown=0, NotChecked=0, Total=10100 [2024-11-28 05:18:05,812 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 101 states, 101 states have (on average 3.0297029702970297) internal successors, (306), 101 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:18:16,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:16,313 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2024-11-28 05:18:16,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-28 05:18:16,314 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.0297029702970297) internal successors, (306), 101 states have internal predecessors, (306), 0 states have call successors, (0), 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 152 [2024-11-28 05:18:16,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:16,315 INFO L225 Difference]: With dead ends: 235 [2024-11-28 05:18:16,315 INFO L226 Difference]: Without dead ends: 160 [2024-11-28 05:18:16,316 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6766 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1641, Invalid=27089, Unknown=0, NotChecked=0, Total=28730 [2024-11-28 05:18:16,316 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 40 mSDsluCounter, 2258 mSDsCounter, 0 mSdLazyCounter, 7094 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 7144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 7094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:18:16,316 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 2299 Invalid, 7144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 7094 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-28 05:18:16,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-28 05:18:16,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2024-11-28 05:18:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:18:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2024-11-28 05:18:16,320 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 152 [2024-11-28 05:18:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:16,320 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2024-11-28 05:18:16,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.0297029702970297) internal successors, (306), 101 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:18:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2024-11-28 05:18:16,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-28 05:18:16,322 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:16,322 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:16,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 05:18:16,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-28 05:18:16,523 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:18:16,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:16,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1678385137, now seen corresponding path program 34 times [2024-11-28 05:18:16,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:16,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633067742] [2024-11-28 05:18:16,524 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:18:16,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:16,660 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:18:16,660 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:18:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 561 proven. 735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:18:20,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:20,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633067742] [2024-11-28 05:18:20,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633067742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:18:20,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974513206] [2024-11-28 05:18:20,696 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:18:20,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:20,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:20,700 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:18:20,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 05:18:36,457 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:18:36,457 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:18:36,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 310 conjuncts are in the unsatisfiable core [2024-11-28 05:18:36,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:18:36,536 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 [2024-11-28 05:18:36,552 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 [2024-11-28 05:18:36,575 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 [2024-11-28 05:18:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 561 proven. 735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:18:43,220 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:18:49,596 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:18:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 630 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:18:49,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974513206] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:18:49,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:18:49,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 42, 42] total 128 [2024-11-28 05:18:49,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930856028] [2024-11-28 05:18:49,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:18:49,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-11-28 05:18:49,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:49,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-11-28 05:18:49,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=14912, Unknown=0, NotChecked=0, Total=16512 [2024-11-28 05:18:49,733 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 129 states, 128 states have (on average 3.640625) internal successors, (466), 129 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:18:55,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:55,609 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2024-11-28 05:18:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-28 05:18:55,609 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 128 states have (on average 3.640625) internal successors, (466), 129 states have internal predecessors, (466), 0 states have call successors, (0), 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 156 [2024-11-28 05:18:55,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:55,610 INFO L225 Difference]: With dead ends: 161 [2024-11-28 05:18:55,610 INFO L226 Difference]: Without dead ends: 161 [2024-11-28 05:18:55,612 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8052 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=2773, Invalid=25619, Unknown=0, NotChecked=0, Total=28392 [2024-11-28 05:18:55,612 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 4415 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 4417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:18:55,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1387 Invalid, 4417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4415 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-28 05:18:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-28 05:18:55,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-11-28 05:18:55,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:18:55,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2024-11-28 05:18:55,615 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 156 [2024-11-28 05:18:55,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:55,616 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2024-11-28 05:18:55,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 128 states have (on average 3.640625) internal successors, (466), 129 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:18:55,616 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2024-11-28 05:18:55,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-28 05:18:55,617 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:55,617 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:55,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 05:18:55,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-28 05:18:55,818 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:18:55,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:55,818 INFO L85 PathProgramCache]: Analyzing trace with hash 287558443, now seen corresponding path program 35 times [2024-11-28 05:18:55,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:55,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985179842] [2024-11-28 05:18:55,818 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:18:55,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:55,966 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-11-28 05:18:55,966 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 629 proven. 742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:19:00,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:00,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985179842] [2024-11-28 05:19:00,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985179842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:00,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320064278] [2024-11-28 05:19:00,135 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:19:00,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:00,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:00,137 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:00,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 05:19:30,358 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-11-28 05:19:30,358 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:30,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 204 conjuncts are in the unsatisfiable core [2024-11-28 05:19:30,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:31,829 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 [2024-11-28 05:19:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 57 proven. 1314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:19:34,010 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:34,170 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 [2024-11-28 05:19:34,172 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 [2024-11-28 05:19:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 57 proven. 1314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:19:34,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320064278] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:34,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:34,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 45, 45] total 95 [2024-11-28 05:19:34,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612424102] [2024-11-28 05:19:34,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:34,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-11-28 05:19:34,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:34,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-11-28 05:19:34,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=8540, Unknown=0, NotChecked=0, Total=8930 [2024-11-28 05:19:34,522 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 95 states, 95 states have (on average 3.3684210526315788) internal successors, (320), 95 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:19:45,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:45,262 INFO L93 Difference]: Finished difference Result 247 states and 248 transitions. [2024-11-28 05:19:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-11-28 05:19:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.3684210526315788) internal successors, (320), 95 states have internal predecessors, (320), 0 states have call successors, (0), 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 160 [2024-11-28 05:19:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:45,264 INFO L225 Difference]: With dead ends: 247 [2024-11-28 05:19:45,264 INFO L226 Difference]: Without dead ends: 168 [2024-11-28 05:19:45,265 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6107 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1586, Invalid=28170, Unknown=0, NotChecked=0, Total=29756 [2024-11-28 05:19:45,266 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 101 mSDsluCounter, 2531 mSDsCounter, 0 mSdLazyCounter, 7751 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2574 SdHoareTripleChecker+Invalid, 7805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 7751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:45,266 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 2574 Invalid, 7805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 7751 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-28 05:19:45,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-28 05:19:45,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2024-11-28 05:19:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:19:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2024-11-28 05:19:45,269 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 160 [2024-11-28 05:19:45,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:45,270 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2024-11-28 05:19:45,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.3684210526315788) internal successors, (320), 95 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:19:45,270 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2024-11-28 05:19:45,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-11-28 05:19:45,271 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:45,271 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:45,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:45,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-28 05:19:45,472 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 05:19:45,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:45,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1750742556, now seen corresponding path program 36 times [2024-11-28 05:19:45,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:45,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214659406] [2024-11-28 05:19:45,472 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:19:45,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:45,616 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2024-11-28 05:19:45,616 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 561 proven. 883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:19:49,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:49,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214659406] [2024-11-28 05:19:49,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214659406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:49,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259632358] [2024-11-28 05:19:49,404 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:19:49,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:49,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:49,407 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:49,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da05b3-69a1-47ef-ae1e-2ed457f216ea/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process