./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/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_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/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_a3eaf105-714a-4314-a1c6-bef2b8f99585/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 d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:14:29,057 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:14:29,139 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 02:14:29,149 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:14:29,150 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:14:29,180 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:14:29,181 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:14:29,181 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:14:29,182 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:14:29,182 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:14:29,182 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:14:29,182 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:14:29,183 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:14:29,183 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:14:29,183 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:14:29,184 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:14:29,184 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:14:29,184 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:14:29,188 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:14:29,188 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:14:29,188 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 02:14:29,188 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 02:14:29,189 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 02:14:29,189 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:14:29,189 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:14:29,189 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:14:29,189 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:14:29,189 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:14:29,189 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:14:29,189 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:14:29,190 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:14:29,190 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:14:29,190 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:14:29,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:14:29,190 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:14:29,190 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:14:29,190 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:14:29,190 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:14:29,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:14:29,191 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:14:29,191 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:14:29,191 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:14:29,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:14:29,191 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:14:29,191 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:14:29,191 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:14:29,192 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:14:29,192 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_a3eaf105-714a-4314-a1c6-bef2b8f99585/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 -> d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 [2024-11-28 02:14:29,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:14:29,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:14:29,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:14:29,611 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:14:29,612 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:14:29,615 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2024-11-28 02:14:33,312 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/data/6b8c6cf67/a25705f88f2f4ecfa5351642d13d0b45/FLAG51870b759 [2024-11-28 02:14:33,842 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:14:33,843 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2024-11-28 02:14:33,875 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/data/6b8c6cf67/a25705f88f2f4ecfa5351642d13d0b45/FLAG51870b759 [2024-11-28 02:14:33,908 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/data/6b8c6cf67/a25705f88f2f4ecfa5351642d13d0b45 [2024-11-28 02:14:33,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:14:33,917 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:14:33,921 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:14:33,921 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:14:33,926 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:14:33,928 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:14:33" (1/1) ... [2024-11-28 02:14:33,931 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22105436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:33, skipping insertion in model container [2024-11-28 02:14:33,932 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:14:33" (1/1) ... [2024-11-28 02:14:33,987 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:14:34,387 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 02:14:34,388 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 02:14:34,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:14:34,409 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:14:34,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:14:34,498 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:14:34,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34 WrapperNode [2024-11-28 02:14:34,499 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:14:34,500 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:14:34,500 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:14:34,500 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:14:34,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34" (1/1) ... [2024-11-28 02:14:34,520 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34" (1/1) ... [2024-11-28 02:14:34,549 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2024-11-28 02:14:34,553 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:14:34,554 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:14:34,554 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:14:34,554 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:14:34,566 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34" (1/1) ... [2024-11-28 02:14:34,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34" (1/1) ... [2024-11-28 02:14:34,573 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34" (1/1) ... [2024-11-28 02:14:34,607 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [3, 3]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2024-11-28 02:14:34,607 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34" (1/1) ... [2024-11-28 02:14:34,608 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34" (1/1) ... [2024-11-28 02:14:34,624 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34" (1/1) ... [2024-11-28 02:14:34,625 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34" (1/1) ... [2024-11-28 02:14:34,630 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34" (1/1) ... [2024-11-28 02:14:34,634 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34" (1/1) ... [2024-11-28 02:14:34,635 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34" (1/1) ... [2024-11-28 02:14:34,637 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:14:34,639 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:14:34,639 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:14:34,639 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:14:34,640 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34" (1/1) ... [2024-11-28 02:14:34,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:14:34,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:34,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:14:34,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:14:34,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 02:14:34,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 02:14:34,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 02:14:34,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 02:14:34,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 02:14:34,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 02:14:34,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:14:34,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:14:34,856 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:14:34,859 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:14:35,198 INFO L? ?]: Removed 59 outVars from TransFormulas that were not future-live. [2024-11-28 02:14:35,199 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:14:35,218 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:14:35,218 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 02:14:35,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:14:35 BoogieIcfgContainer [2024-11-28 02:14:35,219 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:14:35,224 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:14:35,224 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:14:35,230 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:14:35,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:14:33" (1/3) ... [2024-11-28 02:14:35,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a789f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:14:35, skipping insertion in model container [2024-11-28 02:14:35,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:14:34" (2/3) ... [2024-11-28 02:14:35,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a789f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:14:35, skipping insertion in model container [2024-11-28 02:14:35,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:14:35" (3/3) ... [2024-11-28 02:14:35,235 INFO L128 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2024-11-28 02:14:35,255 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:14:35,259 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrpbrk-alloca-2.i that has 1 procedures, 46 locations, 1 initial locations, 4 loop locations, and 13 error locations. [2024-11-28 02:14:35,321 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:14:35,341 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;@598b3346, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:14:35,341 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-11-28 02:14:35,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 32 states have (on average 1.75) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 02:14:35,356 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:35,356 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:35,357 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:35,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:35,363 INFO L85 PathProgramCache]: Analyzing trace with hash 121325233, now seen corresponding path program 1 times [2024-11-28 02:14:35,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:35,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597067651] [2024-11-28 02:14:35,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:35,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:35,846 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 02:14:35,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:35,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597067651] [2024-11-28 02:14:35,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597067651] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:35,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:14:35,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:14:35,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353634628] [2024-11-28 02:14:35,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:35,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:14:35,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:35,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:14:35,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:14:35,896 INFO L87 Difference]: Start difference. First operand has 46 states, 32 states have (on average 1.75) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:35,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:35,980 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2024-11-28 02:14:35,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:14:35,983 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 02:14:35,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:35,993 INFO L225 Difference]: With dead ends: 44 [2024-11-28 02:14:35,993 INFO L226 Difference]: Without dead ends: 42 [2024-11-28 02:14:35,995 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 02:14:35,999 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:36,000 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 60 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:36,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-28 02:14:36,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-28 02:14:36,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-11-28 02:14:36,040 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 8 [2024-11-28 02:14:36,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:36,040 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-11-28 02:14:36,040 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 02:14:36,041 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-11-28 02:14:36,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 02:14:36,041 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:36,041 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:36,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:14:36,042 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:36,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:36,043 INFO L85 PathProgramCache]: Analyzing trace with hash 121325234, now seen corresponding path program 1 times [2024-11-28 02:14:36,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:36,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280614024] [2024-11-28 02:14:36,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:36,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:36,605 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 02:14:36,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:36,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280614024] [2024-11-28 02:14:36,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280614024] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:36,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:14:36,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:14:36,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044076036] [2024-11-28 02:14:36,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:36,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:14:36,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:36,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:14:36,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:14:36,609 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:36,799 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2024-11-28 02:14:36,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:14:36,800 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 02:14:36,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:36,802 INFO L225 Difference]: With dead ends: 62 [2024-11-28 02:14:36,802 INFO L226 Difference]: Without dead ends: 62 [2024-11-28 02:14:36,803 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:14:36,805 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 24 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:36,806 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 164 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:36,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-28 02:14:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2024-11-28 02:14:36,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.5) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2024-11-28 02:14:36,819 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 8 [2024-11-28 02:14:36,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:36,820 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2024-11-28 02:14:36,820 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 02:14:36,820 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2024-11-28 02:14:36,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 02:14:36,821 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:36,821 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:36,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:14:36,822 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:36,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:36,822 INFO L85 PathProgramCache]: Analyzing trace with hash 178583536, now seen corresponding path program 1 times [2024-11-28 02:14:36,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:36,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572982833] [2024-11-28 02:14:36,823 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:36,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:37,187 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 02:14:37,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:37,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572982833] [2024-11-28 02:14:37,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572982833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:37,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:14:37,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:14:37,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066528977] [2024-11-28 02:14:37,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:37,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:14:37,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:37,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:14:37,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:14:37,192 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:37,274 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2024-11-28 02:14:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:14:37,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-28 02:14:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:37,277 INFO L225 Difference]: With dead ends: 51 [2024-11-28 02:14:37,277 INFO L226 Difference]: Without dead ends: 51 [2024-11-28 02:14:37,278 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:14:37,279 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:37,279 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 116 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:37,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-28 02:14:37,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2024-11-28 02:14:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.5) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2024-11-28 02:14:37,292 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 8 [2024-11-28 02:14:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:37,292 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2024-11-28 02:14:37,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2024-11-28 02:14:37,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 02:14:37,293 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:37,293 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:37,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:14:37,293 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:37,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:37,296 INFO L85 PathProgramCache]: Analyzing trace with hash -706351253, now seen corresponding path program 1 times [2024-11-28 02:14:37,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:37,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260875368] [2024-11-28 02:14:37,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:37,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:14:37,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:37,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260875368] [2024-11-28 02:14:37,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260875368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:37,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271803237] [2024-11-28 02:14:37,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:37,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:37,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:37,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:37,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:14:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:37,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:14:37,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:14:37,648 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:14:37,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271803237] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:37,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:14:37,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-28 02:14:37,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35608356] [2024-11-28 02:14:37,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:37,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:14:37,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:37,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:14:37,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:14:37,654 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:37,709 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2024-11-28 02:14:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:14:37,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-28 02:14:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:37,714 INFO L225 Difference]: With dead ends: 61 [2024-11-28 02:14:37,715 INFO L226 Difference]: Without dead ends: 61 [2024-11-28 02:14:37,715 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:14:37,716 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:37,716 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 118 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:14:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-28 02:14:37,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2024-11-28 02:14:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:37,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-11-28 02:14:37,728 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 12 [2024-11-28 02:14:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:37,728 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-11-28 02:14:37,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:37,728 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-11-28 02:14:37,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 02:14:37,729 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:37,729 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:37,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 02:14:37,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:37,930 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:37,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:37,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1099378263, now seen corresponding path program 1 times [2024-11-28 02:14:37,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:37,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420158385] [2024-11-28 02:14:37,931 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:37,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:38,501 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 02:14:38,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:38,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420158385] [2024-11-28 02:14:38,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420158385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:38,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927747609] [2024-11-28 02:14:38,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:38,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:38,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:38,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:38,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:14:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:38,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 02:14:38,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:38,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:14:38,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-28 02:14:38,733 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 02:14:39,173 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 02:14:39,174 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:39,621 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:14:39,716 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 02:14:39,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927747609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:14:39,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:14:39,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-28 02:14:39,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403217096] [2024-11-28 02:14:39,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:14:39,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 02:14:39,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:39,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 02:14:39,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-28 02:14:39,721 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:40,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:40,017 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2024-11-28 02:14:40,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:14:40,018 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 02:14:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:40,018 INFO L225 Difference]: With dead ends: 52 [2024-11-28 02:14:40,018 INFO L226 Difference]: Without dead ends: 52 [2024-11-28 02:14:40,019 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:14:40,020 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:40,020 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 172 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:40,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-28 02:14:40,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2024-11-28 02:14:40,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.435897435897436) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:40,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2024-11-28 02:14:40,027 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2024-11-28 02:14:40,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:40,027 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2024-11-28 02:14:40,028 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 02:14:40,028 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2024-11-28 02:14:40,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 02:14:40,028 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:40,029 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:40,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 02:14:40,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:40,234 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:40,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:40,234 INFO L85 PathProgramCache]: Analyzing trace with hash -196624046, now seen corresponding path program 1 times [2024-11-28 02:14:40,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:40,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230700659] [2024-11-28 02:14:40,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:40,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:40,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:40,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230700659] [2024-11-28 02:14:40,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230700659] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:40,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:14:40,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:14:40,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917102195] [2024-11-28 02:14:40,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:40,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:14:40,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:40,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:14:40,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:14:40,350 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:40,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:40,399 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2024-11-28 02:14:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:14:40,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 02:14:40,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:40,401 INFO L225 Difference]: With dead ends: 47 [2024-11-28 02:14:40,401 INFO L226 Difference]: Without dead ends: 47 [2024-11-28 02:14:40,401 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 02:14:40,402 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:40,405 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 56 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:14:40,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-28 02:14:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-28 02:14:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2024-11-28 02:14:40,415 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 14 [2024-11-28 02:14:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:40,415 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2024-11-28 02:14:40,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2024-11-28 02:14:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 02:14:40,416 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:40,416 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:40,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 02:14:40,417 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:40,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:40,417 INFO L85 PathProgramCache]: Analyzing trace with hash -196624045, now seen corresponding path program 1 times [2024-11-28 02:14:40,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:40,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805588914] [2024-11-28 02:14:40,418 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:40,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:40,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:40,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805588914] [2024-11-28 02:14:40,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805588914] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:40,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:14:40,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:14:40,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366241911] [2024-11-28 02:14:40,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:40,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:14:40,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:40,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:14:40,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:14:40,763 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:40,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:40,899 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2024-11-28 02:14:40,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:14:40,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 02:14:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:40,904 INFO L225 Difference]: With dead ends: 73 [2024-11-28 02:14:40,904 INFO L226 Difference]: Without dead ends: 73 [2024-11-28 02:14:40,904 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:14:40,905 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:40,905 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 132 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:40,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-28 02:14:40,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2024-11-28 02:14:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 69 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2024-11-28 02:14:40,919 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 14 [2024-11-28 02:14:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:40,919 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2024-11-28 02:14:40,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2024-11-28 02:14:40,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 02:14:40,924 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:40,924 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:40,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 02:14:40,924 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:40,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:40,925 INFO L85 PathProgramCache]: Analyzing trace with hash 504440533, now seen corresponding path program 1 times [2024-11-28 02:14:40,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:40,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673480065] [2024-11-28 02:14:40,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:40,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:41,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:41,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673480065] [2024-11-28 02:14:41,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673480065] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:41,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:14:41,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:14:41,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000914312] [2024-11-28 02:14:41,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:41,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:14:41,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:41,236 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:14:41,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:14:41,237 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:41,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:41,374 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2024-11-28 02:14:41,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:14:41,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 02:14:41,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:41,376 INFO L225 Difference]: With dead ends: 75 [2024-11-28 02:14:41,376 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 02:14:41,377 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:14:41,378 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:41,378 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 121 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:41,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 02:14:41,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2024-11-28 02:14:41,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 72 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:41,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2024-11-28 02:14:41,386 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 14 [2024-11-28 02:14:41,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:41,386 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2024-11-28 02:14:41,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:41,386 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2024-11-28 02:14:41,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:14:41,387 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:41,387 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:41,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 02:14:41,388 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:41,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:41,389 INFO L85 PathProgramCache]: Analyzing trace with hash 487237132, now seen corresponding path program 1 times [2024-11-28 02:14:41,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:41,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128728516] [2024-11-28 02:14:41,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:41,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:41,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:41,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128728516] [2024-11-28 02:14:41,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128728516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:41,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309315076] [2024-11-28 02:14:41,510 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:41,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:41,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:41,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:41,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:14:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:41,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:14:41,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:41,697 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:14:41,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309315076] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:41,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:14:41,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-28 02:14:41,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856278788] [2024-11-28 02:14:41,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:41,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:14:41,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:41,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:14:41,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:14:41,699 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:41,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:41,743 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2024-11-28 02:14:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:14:41,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-28 02:14:41,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:41,745 INFO L225 Difference]: With dead ends: 72 [2024-11-28 02:14:41,745 INFO L226 Difference]: Without dead ends: 72 [2024-11-28 02:14:41,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:14:41,746 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:41,750 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 109 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:14:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-28 02:14:41,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2024-11-28 02:14:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 70 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2024-11-28 02:14:41,760 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 18 [2024-11-28 02:14:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:41,760 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2024-11-28 02:14:41,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2024-11-28 02:14:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:14:41,762 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:41,763 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:41,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 02:14:41,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:41,968 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:41,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:41,969 INFO L85 PathProgramCache]: Analyzing trace with hash 487239310, now seen corresponding path program 1 times [2024-11-28 02:14:41,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:41,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299104215] [2024-11-28 02:14:41,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:41,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:42,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:42,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299104215] [2024-11-28 02:14:42,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299104215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:42,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194120785] [2024-11-28 02:14:42,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:42,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:42,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:42,165 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:42,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:14:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:42,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:14:42,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:42,471 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:42,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-28 02:14:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:42,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194120785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:14:42,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:14:42,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-28 02:14:42,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049371914] [2024-11-28 02:14:42,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:14:42,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:14:42,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:42,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:14:42,675 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:14:42,676 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:42,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:42,863 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2024-11-28 02:14:42,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:14:42,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-28 02:14:42,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:42,864 INFO L225 Difference]: With dead ends: 90 [2024-11-28 02:14:42,865 INFO L226 Difference]: Without dead ends: 90 [2024-11-28 02:14:42,866 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:14:42,866 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:42,867 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 195 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:42,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-28 02:14:42,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2024-11-28 02:14:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 88 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2024-11-28 02:14:42,881 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 18 [2024-11-28 02:14:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:42,881 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2024-11-28 02:14:42,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2024-11-28 02:14:42,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:14:42,883 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:42,883 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:42,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:14:43,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 02:14:43,088 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:43,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:43,088 INFO L85 PathProgramCache]: Analyzing trace with hash -792626546, now seen corresponding path program 1 times [2024-11-28 02:14:43,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:43,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752728915] [2024-11-28 02:14:43,089 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:43,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:43,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:43,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752728915] [2024-11-28 02:14:43,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752728915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:43,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685325252] [2024-11-28 02:14:43,565 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:43,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:43,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:43,567 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:43,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:14:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:43,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:14:43,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:43,706 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 02:14:43,721 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 02:14:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:44,127 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:44,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685325252] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:14:44,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:14:44,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-11-28 02:14:44,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292942320] [2024-11-28 02:14:44,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:14:44,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 02:14:44,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:44,687 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 02:14:44,687 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2024-11-28 02:14:44,687 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:45,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:45,026 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2024-11-28 02:14:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:14:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-28 02:14:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:45,027 INFO L225 Difference]: With dead ends: 90 [2024-11-28 02:14:45,027 INFO L226 Difference]: Without dead ends: 90 [2024-11-28 02:14:45,028 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2024-11-28 02:14:45,028 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 19 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:45,029 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 211 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:14:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-28 02:14:45,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2024-11-28 02:14:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2024-11-28 02:14:45,041 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 18 [2024-11-28 02:14:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:45,041 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2024-11-28 02:14:45,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:45,042 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2024-11-28 02:14:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:14:45,042 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:45,042 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:45,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 02:14:45,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 02:14:45,243 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:45,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:45,244 INFO L85 PathProgramCache]: Analyzing trace with hash -533829044, now seen corresponding path program 1 times [2024-11-28 02:14:45,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:45,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821811369] [2024-11-28 02:14:45,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:45,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:45,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:45,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821811369] [2024-11-28 02:14:45,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821811369] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:45,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:14:45,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:14:45,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481822014] [2024-11-28 02:14:45,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:45,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:14:45,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:45,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:14:45,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:14:45,450 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:45,490 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2024-11-28 02:14:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:14:45,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-28 02:14:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:45,492 INFO L225 Difference]: With dead ends: 83 [2024-11-28 02:14:45,492 INFO L226 Difference]: Without dead ends: 83 [2024-11-28 02:14:45,492 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:14:45,493 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:45,495 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 78 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:14:45,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-28 02:14:45,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2024-11-28 02:14:45,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 66 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2024-11-28 02:14:45,503 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 18 [2024-11-28 02:14:45,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:45,503 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2024-11-28 02:14:45,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:45,503 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2024-11-28 02:14:45,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 02:14:45,504 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:45,504 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:45,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 02:14:45,504 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:45,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:45,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1198448363, now seen corresponding path program 1 times [2024-11-28 02:14:45,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:45,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304107322] [2024-11-28 02:14:45,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:45,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:45,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:45,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304107322] [2024-11-28 02:14:45,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304107322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:45,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:14:45,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:14:45,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182770781] [2024-11-28 02:14:45,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:45,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:14:45,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:45,690 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:14:45,690 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:14:45,690 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:45,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:45,755 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2024-11-28 02:14:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:14:45,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-28 02:14:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:45,756 INFO L225 Difference]: With dead ends: 68 [2024-11-28 02:14:45,756 INFO L226 Difference]: Without dead ends: 68 [2024-11-28 02:14:45,757 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:14:45,758 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:45,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 115 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-28 02:14:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2024-11-28 02:14:45,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2024-11-28 02:14:45,763 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 19 [2024-11-28 02:14:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:45,763 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2024-11-28 02:14:45,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:45,763 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2024-11-28 02:14:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 02:14:45,764 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:45,764 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:45,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 02:14:45,768 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:45,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:45,769 INFO L85 PathProgramCache]: Analyzing trace with hash 600992369, now seen corresponding path program 1 times [2024-11-28 02:14:45,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:45,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867626882] [2024-11-28 02:14:45,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:45,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:45,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:45,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867626882] [2024-11-28 02:14:45,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867626882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:45,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:14:45,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:14:45,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548093929] [2024-11-28 02:14:45,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:45,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:14:45,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:45,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:14:45,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:14:45,893 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:45,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:45,966 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2024-11-28 02:14:45,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:14:45,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-28 02:14:45,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:45,967 INFO L225 Difference]: With dead ends: 63 [2024-11-28 02:14:45,968 INFO L226 Difference]: Without dead ends: 63 [2024-11-28 02:14:45,968 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 02:14:45,968 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:45,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 81 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:45,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-28 02:14:45,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-11-28 02:14:45,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.206896551724138) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2024-11-28 02:14:45,972 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 22 [2024-11-28 02:14:45,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:45,973 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2024-11-28 02:14:45,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:45,973 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2024-11-28 02:14:45,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 02:14:45,973 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:45,973 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:45,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 02:14:45,974 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:45,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:45,974 INFO L85 PathProgramCache]: Analyzing trace with hash 600992370, now seen corresponding path program 1 times [2024-11-28 02:14:45,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:45,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898590987] [2024-11-28 02:14:45,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:45,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:46,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:46,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898590987] [2024-11-28 02:14:46,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898590987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:46,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503024834] [2024-11-28 02:14:46,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:46,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:46,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:46,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:46,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:14:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:46,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 02:14:46,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:46,382 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-28 02:14:46,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-28 02:14:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:46,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:47,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503024834] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:47,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:14:47,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 8] total 20 [2024-11-28 02:14:47,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899145012] [2024-11-28 02:14:47,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:47,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:14:47,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:47,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:14:47,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:14:47,140 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:47,286 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2024-11-28 02:14:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:14:47,286 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-28 02:14:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:47,287 INFO L225 Difference]: With dead ends: 80 [2024-11-28 02:14:47,287 INFO L226 Difference]: Without dead ends: 80 [2024-11-28 02:14:47,287 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-11-28 02:14:47,288 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:47,288 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 161 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:47,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-28 02:14:47,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-28 02:14:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 79 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:47,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2024-11-28 02:14:47,292 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 22 [2024-11-28 02:14:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:47,293 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2024-11-28 02:14:47,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:47,293 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2024-11-28 02:14:47,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 02:14:47,294 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:47,294 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:47,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 02:14:47,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 02:14:47,499 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:47,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:47,499 INFO L85 PathProgramCache]: Analyzing trace with hash -216656080, now seen corresponding path program 1 times [2024-11-28 02:14:47,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:47,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307535280] [2024-11-28 02:14:47,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:47,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:47,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:47,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307535280] [2024-11-28 02:14:47,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307535280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:47,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60726041] [2024-11-28 02:14:47,707 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:47,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:47,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:47,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:47,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:14:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:47,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 02:14:47,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:47,990 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:48,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:14:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:48,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60726041] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:14:48,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:14:48,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-28 02:14:48,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247378505] [2024-11-28 02:14:48,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:14:48,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:14:48,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:48,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:14:48,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:14:48,114 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:48,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:48,271 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2024-11-28 02:14:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:14:48,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-28 02:14:48,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:48,272 INFO L225 Difference]: With dead ends: 88 [2024-11-28 02:14:48,273 INFO L226 Difference]: Without dead ends: 88 [2024-11-28 02:14:48,274 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:14:48,274 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:48,275 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 229 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-28 02:14:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2024-11-28 02:14:48,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.2) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2024-11-28 02:14:48,282 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 22 [2024-11-28 02:14:48,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:48,283 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2024-11-28 02:14:48,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2024-11-28 02:14:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 02:14:48,284 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:48,284 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:48,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:14:48,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 02:14:48,484 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:48,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:48,485 INFO L85 PathProgramCache]: Analyzing trace with hash 335619097, now seen corresponding path program 1 times [2024-11-28 02:14:48,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:48,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124132210] [2024-11-28 02:14:48,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:48,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:48,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:48,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124132210] [2024-11-28 02:14:48,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124132210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:48,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407446094] [2024-11-28 02:14:48,792 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:48,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:48,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:48,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:48,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:14:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:48,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 02:14:48,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:49,100 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:49,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:14:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:49,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407446094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:14:49,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:14:49,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-28 02:14:49,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109479533] [2024-11-28 02:14:49,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:14:49,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 02:14:49,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:49,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 02:14:49,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:14:49,223 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:49,419 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2024-11-28 02:14:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:14:49,420 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-28 02:14:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:49,421 INFO L225 Difference]: With dead ends: 69 [2024-11-28 02:14:49,421 INFO L226 Difference]: Without dead ends: 69 [2024-11-28 02:14:49,421 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-28 02:14:49,422 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:49,422 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 197 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-28 02:14:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2024-11-28 02:14:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 65 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2024-11-28 02:14:49,428 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 27 [2024-11-28 02:14:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:49,428 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2024-11-28 02:14:49,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2024-11-28 02:14:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 02:14:49,429 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:49,429 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:49,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 02:14:49,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 02:14:49,636 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:49,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:49,636 INFO L85 PathProgramCache]: Analyzing trace with hash 335619096, now seen corresponding path program 1 times [2024-11-28 02:14:49,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:49,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398211367] [2024-11-28 02:14:49,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:49,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:49,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:49,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398211367] [2024-11-28 02:14:49,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398211367] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:49,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:14:49,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:14:49,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989183840] [2024-11-28 02:14:49,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:49,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:14:49,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:49,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:14:49,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:14:49,742 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:49,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:49,843 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2024-11-28 02:14:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:14:49,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-28 02:14:49,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:49,844 INFO L225 Difference]: With dead ends: 70 [2024-11-28 02:14:49,844 INFO L226 Difference]: Without dead ends: 70 [2024-11-28 02:14:49,844 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:14:49,845 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:49,845 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 115 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:49,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-28 02:14:49,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2024-11-28 02:14:49,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:49,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2024-11-28 02:14:49,849 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 27 [2024-11-28 02:14:49,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:49,849 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2024-11-28 02:14:49,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:49,850 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2024-11-28 02:14:49,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 02:14:49,850 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:49,850 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:49,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 02:14:49,851 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:49,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:49,851 INFO L85 PathProgramCache]: Analyzing trace with hash 335704432, now seen corresponding path program 1 times [2024-11-28 02:14:49,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:49,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770447800] [2024-11-28 02:14:49,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:49,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:14:50,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:50,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770447800] [2024-11-28 02:14:50,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770447800] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:50,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:14:50,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:14:50,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449112928] [2024-11-28 02:14:50,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:50,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:14:50,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:50,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:14:50,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:14:50,056 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:50,091 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2024-11-28 02:14:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:14:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-28 02:14:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:50,092 INFO L225 Difference]: With dead ends: 64 [2024-11-28 02:14:50,092 INFO L226 Difference]: Without dead ends: 61 [2024-11-28 02:14:50,093 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 02:14:50,093 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:50,093 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 60 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:14:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-28 02:14:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-28 02:14:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:50,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2024-11-28 02:14:50,098 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 27 [2024-11-28 02:14:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:50,099 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2024-11-28 02:14:50,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:50,099 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2024-11-28 02:14:50,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 02:14:50,101 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:50,101 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:50,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 02:14:50,102 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:50,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:50,102 INFO L85 PathProgramCache]: Analyzing trace with hash 674848063, now seen corresponding path program 1 times [2024-11-28 02:14:50,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:50,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009006259] [2024-11-28 02:14:50,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:50,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:14:50,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:50,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009006259] [2024-11-28 02:14:50,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009006259] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:50,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:14:50,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:14:50,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437846986] [2024-11-28 02:14:50,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:50,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:14:50,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:50,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:14:50,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:14:50,443 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:50,531 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2024-11-28 02:14:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:14:50,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-28 02:14:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:50,532 INFO L225 Difference]: With dead ends: 81 [2024-11-28 02:14:50,532 INFO L226 Difference]: Without dead ends: 48 [2024-11-28 02:14:50,532 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 02:14:50,533 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:50,533 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 197 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:50,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-28 02:14:50,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-28 02:14:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2024-11-28 02:14:50,539 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 31 [2024-11-28 02:14:50,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:50,539 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2024-11-28 02:14:50,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:50,540 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2024-11-28 02:14:50,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 02:14:50,540 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:50,540 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:50,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 02:14:50,541 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:50,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2061051457, now seen corresponding path program 1 times [2024-11-28 02:14:50,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:50,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401548300] [2024-11-28 02:14:50,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:50,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:50,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:50,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:50,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401548300] [2024-11-28 02:14:50,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401548300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:50,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824998589] [2024-11-28 02:14:50,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:50,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:50,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:50,959 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:50,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:14:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:51,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 02:14:51,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:51,183 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 02:14:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:51,222 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:51,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-28 02:14:51,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-28 02:14:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:51,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824998589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:14:51,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:14:51,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-28 02:14:51,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783423407] [2024-11-28 02:14:51,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:14:51,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 02:14:51,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:51,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 02:14:51,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-28 02:14:51,370 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:51,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:51,543 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2024-11-28 02:14:51,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:14:51,543 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-28 02:14:51,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:51,546 INFO L225 Difference]: With dead ends: 82 [2024-11-28 02:14:51,546 INFO L226 Difference]: Without dead ends: 62 [2024-11-28 02:14:51,547 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-11-28 02:14:51,548 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:51,548 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 219 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:51,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-28 02:14:51,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2024-11-28 02:14:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 55 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:51,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2024-11-28 02:14:51,552 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 31 [2024-11-28 02:14:51,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:51,552 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2024-11-28 02:14:51,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:51,553 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2024-11-28 02:14:51,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 02:14:51,553 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:51,554 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:51,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 02:14:51,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:51,754 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:51,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:51,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1730057112, now seen corresponding path program 2 times [2024-11-28 02:14:51,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:51,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239918051] [2024-11-28 02:14:51,755 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:14:51,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:51,786 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:14:51,787 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:14:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:52,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:52,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239918051] [2024-11-28 02:14:52,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239918051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:52,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511891220] [2024-11-28 02:14:52,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:14:52,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:52,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:52,204 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:52,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:14:52,301 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:14:52,302 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:14:52,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 02:14:52,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:52,476 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:52,663 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 02:14:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:52,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511891220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:14:52,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:14:52,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-28 02:14:52,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939770663] [2024-11-28 02:14:52,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:14:52,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 02:14:52,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:52,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 02:14:52,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:14:52,728 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 21 states, 20 states have (on average 3.55) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:52,957 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2024-11-28 02:14:52,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:14:52,958 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.55) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-28 02:14:52,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:52,959 INFO L225 Difference]: With dead ends: 73 [2024-11-28 02:14:52,959 INFO L226 Difference]: Without dead ends: 73 [2024-11-28 02:14:52,960 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:14:52,962 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:52,963 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 234 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:52,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-28 02:14:52,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2024-11-28 02:14:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2024-11-28 02:14:52,966 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 35 [2024-11-28 02:14:52,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:52,966 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2024-11-28 02:14:52,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.55) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:52,967 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2024-11-28 02:14:52,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 02:14:52,967 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:52,967 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:52,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 02:14:53,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:53,172 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:53,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:53,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2092193220, now seen corresponding path program 1 times [2024-11-28 02:14:53,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:53,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771787610] [2024-11-28 02:14:53,173 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:53,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:14:53,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:53,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771787610] [2024-11-28 02:14:53,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771787610] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:14:53,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:14:53,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-28 02:14:53,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351888415] [2024-11-28 02:14:53,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:14:53,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:14:53,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:53,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:14:53,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:14:53,450 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:53,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:53,558 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2024-11-28 02:14:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:14:53,558 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-28 02:14:53,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:53,559 INFO L225 Difference]: With dead ends: 93 [2024-11-28 02:14:53,559 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 02:14:53,559 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:14:53,560 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:53,560 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 199 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 02:14:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2024-11-28 02:14:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 91 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2024-11-28 02:14:53,567 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 36 [2024-11-28 02:14:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:53,567 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2024-11-28 02:14:53,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2024-11-28 02:14:53,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 02:14:53,567 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:53,568 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:53,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-28 02:14:53,568 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:53,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:53,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2130387518, now seen corresponding path program 1 times [2024-11-28 02:14:53,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:53,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233871848] [2024-11-28 02:14:53,570 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:53,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:14:53,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:53,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233871848] [2024-11-28 02:14:53,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233871848] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:53,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309124224] [2024-11-28 02:14:53,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:14:53,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:53,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:53,977 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:53,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:14:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:54,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 02:14:54,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:54,209 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 02:14:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:14:54,252 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:54,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-28 02:14:54,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-28 02:14:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:14:54,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309124224] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:14:54,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:14:54,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 20 [2024-11-28 02:14:54,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713658500] [2024-11-28 02:14:54,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:14:54,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:14:54,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:54,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:14:54,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:14:54,378 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:54,652 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2024-11-28 02:14:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 02:14:54,652 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-28 02:14:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:54,653 INFO L225 Difference]: With dead ends: 124 [2024-11-28 02:14:54,653 INFO L226 Difference]: Without dead ends: 124 [2024-11-28 02:14:54,654 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2024-11-28 02:14:54,654 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 75 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:54,655 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 246 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:14:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-28 02:14:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2024-11-28 02:14:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 95 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2024-11-28 02:14:54,658 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 36 [2024-11-28 02:14:54,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:54,659 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2024-11-28 02:14:54,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:54,659 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2024-11-28 02:14:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 02:14:54,659 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:54,659 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:54,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 02:14:54,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:54,860 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:54,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:54,861 INFO L85 PathProgramCache]: Analyzing trace with hash 951322167, now seen corresponding path program 2 times [2024-11-28 02:14:54,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:54,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391844748] [2024-11-28 02:14:54,861 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:14:54,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:54,880 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:14:54,880 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:14:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:14:55,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:55,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391844748] [2024-11-28 02:14:55,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391844748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:55,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957672447] [2024-11-28 02:14:55,268 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:14:55,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:55,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:55,270 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:55,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:14:55,375 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:14:55,375 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:14:55,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 02:14:55,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:14:55,626 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:55,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-28 02:14:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:14:56,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957672447] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:14:56,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:14:56,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-11-28 02:14:56,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537198771] [2024-11-28 02:14:56,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:14:56,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 02:14:56,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:56,024 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 02:14:56,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:14:56,025 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:56,435 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2024-11-28 02:14:56,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:14:56,435 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-28 02:14:56,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:56,436 INFO L225 Difference]: With dead ends: 117 [2024-11-28 02:14:56,436 INFO L226 Difference]: Without dead ends: 117 [2024-11-28 02:14:56,437 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 02:14:56,437 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 56 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:56,438 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 312 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:14:56,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-28 02:14:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 106. [2024-11-28 02:14:56,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 104 states have (on average 1.125) internal successors, (117), 105 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2024-11-28 02:14:56,443 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 40 [2024-11-28 02:14:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:56,443 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2024-11-28 02:14:56,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2024-11-28 02:14:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 02:14:56,444 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:56,444 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:56,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 02:14:56,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:56,648 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:56,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:56,649 INFO L85 PathProgramCache]: Analyzing trace with hash -66179063, now seen corresponding path program 3 times [2024-11-28 02:14:56,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:56,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688385257] [2024-11-28 02:14:56,649 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:14:56,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:56,688 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:14:56,688 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:14:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:57,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:57,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688385257] [2024-11-28 02:14:57,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688385257] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:57,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183134331] [2024-11-28 02:14:57,250 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:14:57,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:57,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:57,254 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:57,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:14:57,403 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:14:57,403 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:14:57,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 02:14:57,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:57,587 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 02:14:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:57,661 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:57,794 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 02:14:57,796 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 02:14:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:14:57,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183134331] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:14:57,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:14:57,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 27 [2024-11-28 02:14:57,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883598559] [2024-11-28 02:14:57,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:14:57,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 02:14:57,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:57,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 02:14:57,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2024-11-28 02:14:57,973 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:58,238 INFO L93 Difference]: Finished difference Result 179 states and 194 transitions. [2024-11-28 02:14:58,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:14:58,239 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-28 02:14:58,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:58,240 INFO L225 Difference]: With dead ends: 179 [2024-11-28 02:14:58,240 INFO L226 Difference]: Without dead ends: 152 [2024-11-28 02:14:58,241 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:14:58,242 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:58,242 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 421 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:14:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-28 02:14:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2024-11-28 02:14:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 143 states have (on average 1.1118881118881119) internal successors, (159), 144 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 159 transitions. [2024-11-28 02:14:58,250 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 159 transitions. Word has length 44 [2024-11-28 02:14:58,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:58,250 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 159 transitions. [2024-11-28 02:14:58,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:58,250 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 159 transitions. [2024-11-28 02:14:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 02:14:58,251 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:58,251 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:14:58,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 02:14:58,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 02:14:58,455 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:14:58,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:58,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1276275481, now seen corresponding path program 3 times [2024-11-28 02:14:58,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:58,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4886022] [2024-11-28 02:14:58,456 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:14:58,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:58,497 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:14:58,497 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:14:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:14:59,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:59,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4886022] [2024-11-28 02:14:59,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4886022] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:59,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514580980] [2024-11-28 02:14:59,415 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:14:59,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:59,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:59,418 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:59,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:14:59,615 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:14:59,615 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:14:59,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 02:14:59,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:59,779 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 02:14:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:14:59,902 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:59,945 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 02:14:59,947 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 02:15:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:00,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514580980] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:00,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:00,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 27 [2024-11-28 02:15:00,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519048860] [2024-11-28 02:15:00,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:00,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 02:15:00,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:00,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 02:15:00,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-11-28 02:15:00,048 INFO L87 Difference]: Start difference. First operand 145 states and 159 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:00,741 INFO L93 Difference]: Finished difference Result 220 states and 237 transitions. [2024-11-28 02:15:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:15:00,742 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-28 02:15:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:00,743 INFO L225 Difference]: With dead ends: 220 [2024-11-28 02:15:00,743 INFO L226 Difference]: Without dead ends: 202 [2024-11-28 02:15:00,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 02:15:00,746 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:00,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 541 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:15:00,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-28 02:15:00,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 187. [2024-11-28 02:15:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 185 states have (on average 1.1081081081081081) internal successors, (205), 186 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:00,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 205 transitions. [2024-11-28 02:15:00,759 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 205 transitions. Word has length 45 [2024-11-28 02:15:00,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:00,759 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 205 transitions. [2024-11-28 02:15:00,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:00,760 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 205 transitions. [2024-11-28 02:15:00,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 02:15:00,763 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:00,763 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:00,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 02:15:00,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:00,967 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:00,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:00,968 INFO L85 PathProgramCache]: Analyzing trace with hash -118398654, now seen corresponding path program 4 times [2024-11-28 02:15:00,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:00,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110292510] [2024-11-28 02:15:00,968 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:15:00,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:01,001 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:15:01,001 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 02:15:02,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:02,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110292510] [2024-11-28 02:15:02,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110292510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:02,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082537009] [2024-11-28 02:15:02,074 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:15:02,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:02,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:02,076 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:02,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:15:02,218 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:15:02,218 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:02,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 02:15:02,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:02,428 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 02:15:03,334 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-11-28 02:15:03,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2024-11-28 02:15:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:15:03,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:04,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-28 02:15:04,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2024-11-28 02:15:05,115 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 5 treesize of output 3 [2024-11-28 02:15:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:15:05,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082537009] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:05,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:05,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 44 [2024-11-28 02:15:05,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085611238] [2024-11-28 02:15:05,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:05,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 02:15:05,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:05,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 02:15:05,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 02:15:05,144 INFO L87 Difference]: Start difference. First operand 187 states and 205 transitions. Second operand has 45 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 45 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:06,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:06,112 INFO L93 Difference]: Finished difference Result 187 states and 202 transitions. [2024-11-28 02:15:06,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:15:06,113 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 45 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-28 02:15:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:06,114 INFO L225 Difference]: With dead ends: 187 [2024-11-28 02:15:06,114 INFO L226 Difference]: Without dead ends: 109 [2024-11-28 02:15:06,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=289, Invalid=2467, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 02:15:06,116 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:06,116 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 334 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:15:06,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-28 02:15:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 89. [2024-11-28 02:15:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 88 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2024-11-28 02:15:06,121 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 48 [2024-11-28 02:15:06,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:06,121 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2024-11-28 02:15:06,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 45 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:06,122 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2024-11-28 02:15:06,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 02:15:06,122 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:06,123 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:06,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 02:15:06,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 02:15:06,323 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:06,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:06,324 INFO L85 PathProgramCache]: Analyzing trace with hash 603134222, now seen corresponding path program 4 times [2024-11-28 02:15:06,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:06,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621407882] [2024-11-28 02:15:06,324 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:15:06,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:06,345 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:15:06,345 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:06,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:06,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621407882] [2024-11-28 02:15:06,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621407882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:06,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439995183] [2024-11-28 02:15:06,662 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:15:06,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:06,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:06,664 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:06,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:15:06,809 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:15:06,809 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:06,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 02:15:06,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:06,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:07,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 02:15:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:07,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439995183] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:07,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:07,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2024-11-28 02:15:07,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224626875] [2024-11-28 02:15:07,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:07,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 02:15:07,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:07,410 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 02:15:07,410 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:15:07,412 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:07,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:07,861 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2024-11-28 02:15:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 02:15:07,862 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-28 02:15:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:07,863 INFO L225 Difference]: With dead ends: 113 [2024-11-28 02:15:07,863 INFO L226 Difference]: Without dead ends: 113 [2024-11-28 02:15:07,863 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:15:07,864 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 74 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:07,864 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 303 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:15:07,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-28 02:15:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2024-11-28 02:15:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0918367346938775) internal successors, (107), 98 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:07,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2024-11-28 02:15:07,877 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 49 [2024-11-28 02:15:07,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:07,877 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2024-11-28 02:15:07,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:07,878 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2024-11-28 02:15:07,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 02:15:07,878 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:07,878 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:07,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 02:15:08,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 02:15:08,079 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:08,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:08,080 INFO L85 PathProgramCache]: Analyzing trace with hash 506179696, now seen corresponding path program 5 times [2024-11-28 02:15:08,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:08,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154339636] [2024-11-28 02:15:08,080 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:15:08,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:08,125 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 02:15:08,126 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:15:09,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:09,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154339636] [2024-11-28 02:15:09,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154339636] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:09,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379362113] [2024-11-28 02:15:09,705 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:15:09,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:09,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:09,707 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:09,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 02:15:09,877 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 02:15:09,877 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:09,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 02:15:09,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:10,156 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 02:15:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:10,252 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:10,302 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 02:15:10,305 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 02:15:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:10,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379362113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:10,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:10,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16, 16] total 33 [2024-11-28 02:15:10,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177608697] [2024-11-28 02:15:10,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:10,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 02:15:10,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:10,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 02:15:10,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 02:15:10,435 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:11,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:11,881 INFO L93 Difference]: Finished difference Result 172 states and 183 transitions. [2024-11-28 02:15:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 02:15:11,882 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-11-28 02:15:11,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:11,884 INFO L225 Difference]: With dead ends: 172 [2024-11-28 02:15:11,884 INFO L226 Difference]: Without dead ends: 116 [2024-11-28 02:15:11,885 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=188, Invalid=2262, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 02:15:11,886 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 60 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:11,886 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 721 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:15:11,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-28 02:15:11,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2024-11-28 02:15:11,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0849056603773586) internal successors, (115), 106 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2024-11-28 02:15:11,892 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 54 [2024-11-28 02:15:11,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:11,892 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2024-11-28 02:15:11,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:11,893 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2024-11-28 02:15:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 02:15:11,893 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:11,893 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:11,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 02:15:12,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:12,098 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:12,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:12,098 INFO L85 PathProgramCache]: Analyzing trace with hash -112531415, now seen corresponding path program 6 times [2024-11-28 02:15:12,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:12,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708709611] [2024-11-28 02:15:12,098 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:15:12,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:12,163 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 02:15:12,163 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:12,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:12,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708709611] [2024-11-28 02:15:12,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708709611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:12,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14914290] [2024-11-28 02:15:12,596 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:15:12,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:12,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:12,598 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:12,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 02:15:12,837 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 02:15:12,837 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:12,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 02:15:12,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:13,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:13,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-28 02:15:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:13,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14914290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:13,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:13,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2024-11-28 02:15:13,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390653952] [2024-11-28 02:15:13,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:13,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 02:15:13,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:13,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 02:15:13,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 02:15:13,813 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 34 states, 33 states have (on average 4.212121212121212) internal successors, (139), 34 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:14,396 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2024-11-28 02:15:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 02:15:14,396 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.212121212121212) internal successors, (139), 34 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-28 02:15:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:14,397 INFO L225 Difference]: With dead ends: 136 [2024-11-28 02:15:14,397 INFO L226 Difference]: Without dead ends: 136 [2024-11-28 02:15:14,398 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=1657, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 02:15:14,398 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 101 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:14,398 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 559 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:15:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-28 02:15:14,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2024-11-28 02:15:14,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0862068965517242) internal successors, (126), 116 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2024-11-28 02:15:14,404 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 58 [2024-11-28 02:15:14,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:14,404 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2024-11-28 02:15:14,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.212121212121212) internal successors, (139), 34 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:14,405 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2024-11-28 02:15:14,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 02:15:14,405 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:14,405 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:14,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 02:15:14,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:14,606 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:14,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:14,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1886394933, now seen corresponding path program 7 times [2024-11-28 02:15:14,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:14,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118056885] [2024-11-28 02:15:14,607 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:15:14,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:15,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:15,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118056885] [2024-11-28 02:15:15,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118056885] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:15,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540730566] [2024-11-28 02:15:15,398 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:15:15,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:15,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:15,400 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:15,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 02:15:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:15,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-28 02:15:15,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:15,730 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 02:15:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:15,866 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:15,918 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 02:15:15,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 02:15:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:16,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540730566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:16,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:16,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 32 [2024-11-28 02:15:16,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460568655] [2024-11-28 02:15:16,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:16,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 02:15:16,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:16,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 02:15:16,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2024-11-28 02:15:16,048 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:16,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:16,740 INFO L93 Difference]: Finished difference Result 202 states and 215 transitions. [2024-11-28 02:15:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 02:15:16,741 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-11-28 02:15:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:16,742 INFO L225 Difference]: With dead ends: 202 [2024-11-28 02:15:16,742 INFO L226 Difference]: Without dead ends: 131 [2024-11-28 02:15:16,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=1888, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 02:15:16,743 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 69 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:16,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 882 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:15:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-28 02:15:16,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2024-11-28 02:15:16,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0806451612903225) internal successors, (134), 124 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:16,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2024-11-28 02:15:16,751 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 63 [2024-11-28 02:15:16,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:16,752 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2024-11-28 02:15:16,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:16,752 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2024-11-28 02:15:16,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-28 02:15:16,753 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:16,753 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:16,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 02:15:16,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-28 02:15:16,954 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:16,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:16,954 INFO L85 PathProgramCache]: Analyzing trace with hash -124681572, now seen corresponding path program 8 times [2024-11-28 02:15:16,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:16,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450688890] [2024-11-28 02:15:16,955 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:15:16,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:16,983 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:15:16,987 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:17,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:17,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450688890] [2024-11-28 02:15:17,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450688890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:17,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586767266] [2024-11-28 02:15:17,686 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:15:17,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:17,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:17,689 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:17,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 02:15:17,867 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:15:17,867 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:17,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-28 02:15:17,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:18,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:18,746 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 02:15:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:18,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586767266] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:18,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:18,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2024-11-28 02:15:18,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034081844] [2024-11-28 02:15:18,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:18,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 02:15:18,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:18,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 02:15:18,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 02:15:18,917 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand has 37 states, 36 states have (on average 3.638888888888889) internal successors, (131), 37 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:19,883 INFO L93 Difference]: Finished difference Result 159 states and 169 transitions. [2024-11-28 02:15:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:15:19,884 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.638888888888889) internal successors, (131), 37 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-11-28 02:15:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:19,885 INFO L225 Difference]: With dead ends: 159 [2024-11-28 02:15:19,885 INFO L226 Difference]: Without dead ends: 159 [2024-11-28 02:15:19,886 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 108 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=284, Invalid=2166, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 02:15:19,886 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 97 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:19,886 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 896 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 02:15:19,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-28 02:15:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2024-11-28 02:15:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0820895522388059) internal successors, (145), 134 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 145 transitions. [2024-11-28 02:15:19,892 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 145 transitions. Word has length 67 [2024-11-28 02:15:19,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:19,892 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 145 transitions. [2024-11-28 02:15:19,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.638888888888889) internal successors, (131), 37 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:19,893 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 145 transitions. [2024-11-28 02:15:19,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-28 02:15:19,895 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:19,895 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:19,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 02:15:20,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 02:15:20,096 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:20,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:20,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1686696030, now seen corresponding path program 9 times [2024-11-28 02:15:20,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:20,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636934680] [2024-11-28 02:15:20,096 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:15:20,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:20,134 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 02:15:20,135 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:20,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:20,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636934680] [2024-11-28 02:15:20,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636934680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:20,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085998064] [2024-11-28 02:15:20,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:15:20,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:20,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:20,951 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:20,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 02:15:21,263 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 02:15:21,263 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:21,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-28 02:15:21,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:21,402 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 02:15:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:21,626 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:21,797 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 02:15:21,800 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 02:15:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:22,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085998064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:22,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:22,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 40 [2024-11-28 02:15:22,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668584417] [2024-11-28 02:15:22,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:22,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 02:15:22,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:22,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 02:15:22,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 02:15:22,018 INFO L87 Difference]: Start difference. First operand 135 states and 145 transitions. Second operand has 40 states, 40 states have (on average 3.375) internal successors, (135), 40 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:22,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:22,950 INFO L93 Difference]: Finished difference Result 235 states and 250 transitions. [2024-11-28 02:15:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 02:15:22,951 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.375) internal successors, (135), 40 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2024-11-28 02:15:22,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:22,952 INFO L225 Difference]: With dead ends: 235 [2024-11-28 02:15:22,952 INFO L226 Difference]: Without dead ends: 149 [2024-11-28 02:15:22,953 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=216, Invalid=2754, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 02:15:22,953 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 118 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:22,954 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1181 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:15:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-28 02:15:22,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2024-11-28 02:15:22,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0774647887323943) internal successors, (153), 142 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:22,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2024-11-28 02:15:22,960 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 72 [2024-11-28 02:15:22,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:22,960 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2024-11-28 02:15:22,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.375) internal successors, (135), 40 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:22,961 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2024-11-28 02:15:22,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-28 02:15:22,966 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:22,966 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:22,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 02:15:23,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-28 02:15:23,167 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:23,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:23,167 INFO L85 PathProgramCache]: Analyzing trace with hash -940102885, now seen corresponding path program 10 times [2024-11-28 02:15:23,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:23,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268815062] [2024-11-28 02:15:23,168 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:15:23,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:23,192 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:15:23,192 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:23,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:23,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268815062] [2024-11-28 02:15:23,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268815062] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:23,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959521579] [2024-11-28 02:15:23,754 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:15:23,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:23,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:23,757 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:23,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 02:15:23,946 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:15:23,946 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:23,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-28 02:15:23,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 55 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:24,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:24,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 02:15:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 55 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:24,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959521579] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:24,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:24,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2024-11-28 02:15:24,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572429258] [2024-11-28 02:15:24,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:24,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 02:15:24,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:24,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 02:15:24,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2024-11-28 02:15:24,748 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand has 30 states, 29 states have (on average 4.068965517241379) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:25,514 INFO L93 Difference]: Finished difference Result 182 states and 193 transitions. [2024-11-28 02:15:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:15:25,514 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.068965517241379) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2024-11-28 02:15:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:25,515 INFO L225 Difference]: With dead ends: 182 [2024-11-28 02:15:25,515 INFO L226 Difference]: Without dead ends: 182 [2024-11-28 02:15:25,516 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 133 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 02:15:25,516 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 110 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:25,516 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 766 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:15:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-28 02:15:25,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 153. [2024-11-28 02:15:25,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0789473684210527) internal successors, (164), 152 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 164 transitions. [2024-11-28 02:15:25,522 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 164 transitions. Word has length 76 [2024-11-28 02:15:25,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:25,523 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 164 transitions. [2024-11-28 02:15:25,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.068965517241379) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:25,523 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 164 transitions. [2024-11-28 02:15:25,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-28 02:15:25,524 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:25,524 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:25,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 02:15:25,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-28 02:15:25,728 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:25,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:25,729 INFO L85 PathProgramCache]: Analyzing trace with hash 705814147, now seen corresponding path program 11 times [2024-11-28 02:15:25,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:25,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557955742] [2024-11-28 02:15:25,729 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:15:25,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:25,782 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 02:15:25,782 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:26,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:26,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557955742] [2024-11-28 02:15:26,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557955742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:26,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881498872] [2024-11-28 02:15:26,634 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:15:26,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:26,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:26,637 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:26,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 02:15:26,842 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 02:15:26,842 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:26,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-28 02:15:26,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:27,006 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 02:15:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:27,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:27,158 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 02:15:27,160 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 02:15:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:27,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881498872] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:27,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:27,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 26 [2024-11-28 02:15:27,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730927471] [2024-11-28 02:15:27,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:27,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 02:15:27,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:27,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 02:15:27,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2024-11-28 02:15:27,248 INFO L87 Difference]: Start difference. First operand 153 states and 164 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:27,989 INFO L93 Difference]: Finished difference Result 268 states and 285 transitions. [2024-11-28 02:15:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 02:15:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2024-11-28 02:15:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:27,991 INFO L225 Difference]: With dead ends: 268 [2024-11-28 02:15:27,991 INFO L226 Difference]: Without dead ends: 167 [2024-11-28 02:15:27,992 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1439, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 02:15:27,992 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 75 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:27,992 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 1242 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:15:27,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-28 02:15:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2024-11-28 02:15:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.075) internal successors, (172), 160 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 172 transitions. [2024-11-28 02:15:27,997 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 172 transitions. Word has length 81 [2024-11-28 02:15:27,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:27,998 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 172 transitions. [2024-11-28 02:15:27,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:27,998 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 172 transitions. [2024-11-28 02:15:27,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-28 02:15:27,999 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:27,999 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:28,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 02:15:28,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 02:15:28,200 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:28,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:28,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1127652138, now seen corresponding path program 12 times [2024-11-28 02:15:28,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:28,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20748086] [2024-11-28 02:15:28,200 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:15:28,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:28,259 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 02:15:28,259 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 55 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:29,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:29,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20748086] [2024-11-28 02:15:29,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20748086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:29,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505585349] [2024-11-28 02:15:29,149 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:15:29,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:29,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:29,152 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:29,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 02:15:29,494 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 02:15:29,494 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:29,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-28 02:15:29,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:29,511 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 02:15:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:15:30,168 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:31,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505585349] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:31,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:31,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 20] total 54 [2024-11-28 02:15:31,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515124490] [2024-11-28 02:15:31,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:31,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-28 02:15:31,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:31,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-28 02:15:31,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2620, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 02:15:31,336 INFO L87 Difference]: Start difference. First operand 161 states and 172 transitions. Second operand has 55 states, 54 states have (on average 3.962962962962963) internal successors, (214), 55 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:32,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:32,410 INFO L93 Difference]: Finished difference Result 205 states and 217 transitions. [2024-11-28 02:15:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 02:15:32,411 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.962962962962963) internal successors, (214), 55 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2024-11-28 02:15:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:32,412 INFO L225 Difference]: With dead ends: 205 [2024-11-28 02:15:32,412 INFO L226 Difference]: Without dead ends: 205 [2024-11-28 02:15:32,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1618 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=722, Invalid=4390, Unknown=0, NotChecked=0, Total=5112 [2024-11-28 02:15:32,414 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 204 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:32,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 434 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:15:32,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-28 02:15:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 171. [2024-11-28 02:15:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.076470588235294) internal successors, (183), 170 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 183 transitions. [2024-11-28 02:15:32,421 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 183 transitions. Word has length 85 [2024-11-28 02:15:32,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:32,421 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 183 transitions. [2024-11-28 02:15:32,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.962962962962963) internal successors, (214), 55 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 183 transitions. [2024-11-28 02:15:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-28 02:15:32,424 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:32,424 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:32,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 02:15:32,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 02:15:32,625 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:32,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:32,626 INFO L85 PathProgramCache]: Analyzing trace with hash 378609620, now seen corresponding path program 13 times [2024-11-28 02:15:32,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:32,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714552535] [2024-11-28 02:15:32,626 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:15:32,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:33,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:33,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714552535] [2024-11-28 02:15:33,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714552535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:33,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222999623] [2024-11-28 02:15:33,672 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:15:33,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:33,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:33,675 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:33,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 02:15:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:33,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-28 02:15:33,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:34,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:15:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:34,372 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:34,459 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 02:15:34,461 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 02:15:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:34,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222999623] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:34,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:34,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 41 [2024-11-28 02:15:34,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540300345] [2024-11-28 02:15:34,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:34,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 02:15:34,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:34,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 02:15:34,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 02:15:34,593 INFO L87 Difference]: Start difference. First operand 171 states and 183 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:35,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:35,991 INFO L93 Difference]: Finished difference Result 301 states and 320 transitions. [2024-11-28 02:15:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 02:15:35,992 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2024-11-28 02:15:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:35,993 INFO L225 Difference]: With dead ends: 301 [2024-11-28 02:15:35,993 INFO L226 Difference]: Without dead ends: 185 [2024-11-28 02:15:35,994 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2024-11-28 02:15:35,994 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 97 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:35,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 2065 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:15:35,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-28 02:15:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 179. [2024-11-28 02:15:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0730337078651686) internal successors, (191), 178 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 191 transitions. [2024-11-28 02:15:36,000 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 191 transitions. Word has length 90 [2024-11-28 02:15:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:36,000 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 191 transitions. [2024-11-28 02:15:36,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 191 transitions. [2024-11-28 02:15:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-28 02:15:36,001 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:36,001 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:36,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 02:15:36,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 02:15:36,202 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:36,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:36,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1357426445, now seen corresponding path program 14 times [2024-11-28 02:15:36,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:36,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152367024] [2024-11-28 02:15:36,203 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:15:36,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:36,235 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:15:36,235 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 66 proven. 173 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:37,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:37,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152367024] [2024-11-28 02:15:37,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152367024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:37,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045018698] [2024-11-28 02:15:37,204 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:15:37,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:37,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:37,209 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:37,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 02:15:37,452 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:15:37,452 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:37,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-28 02:15:37,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 148 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:38,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:38,667 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 02:15:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 148 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:38,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045018698] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:38,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:38,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 48 [2024-11-28 02:15:38,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210640614] [2024-11-28 02:15:38,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:38,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-28 02:15:38,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:38,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-28 02:15:38,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2103, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 02:15:38,922 INFO L87 Difference]: Start difference. First operand 179 states and 191 transitions. Second operand has 49 states, 48 states have (on average 3.8541666666666665) internal successors, (185), 49 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:40,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:40,354 INFO L93 Difference]: Finished difference Result 228 states and 241 transitions. [2024-11-28 02:15:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 02:15:40,355 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.8541666666666665) internal successors, (185), 49 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-11-28 02:15:40,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:40,355 INFO L225 Difference]: With dead ends: 228 [2024-11-28 02:15:40,355 INFO L226 Difference]: Without dead ends: 228 [2024-11-28 02:15:40,357 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 153 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=483, Invalid=4073, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 02:15:40,357 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 233 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:40,357 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1354 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:15:40,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-11-28 02:15:40,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 189. [2024-11-28 02:15:40,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.074468085106383) internal successors, (202), 188 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:40,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 202 transitions. [2024-11-28 02:15:40,364 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 202 transitions. Word has length 94 [2024-11-28 02:15:40,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:40,364 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 202 transitions. [2024-11-28 02:15:40,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.8541666666666665) internal successors, (185), 49 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:40,365 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 202 transitions. [2024-11-28 02:15:40,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-28 02:15:40,366 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:40,366 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:40,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-28 02:15:40,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 02:15:40,570 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:40,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:40,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1215364655, now seen corresponding path program 15 times [2024-11-28 02:15:40,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:40,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327005606] [2024-11-28 02:15:40,571 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:15:40,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:40,646 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-28 02:15:40,646 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:41,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:41,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327005606] [2024-11-28 02:15:41,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327005606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:41,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718183666] [2024-11-28 02:15:41,908 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:15:41,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:41,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:41,910 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:41,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 02:15:42,228 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-28 02:15:42,228 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:42,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-28 02:15:42,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:42,423 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 02:15:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:42,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:43,052 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 02:15:43,054 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 02:15:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:43,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718183666] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:43,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:43,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 26] total 53 [2024-11-28 02:15:43,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861160309] [2024-11-28 02:15:43,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:43,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-28 02:15:43,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:43,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-28 02:15:43,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 02:15:43,521 INFO L87 Difference]: Start difference. First operand 189 states and 202 transitions. Second operand has 53 states, 53 states have (on average 3.6037735849056602) internal successors, (191), 53 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:45,352 INFO L93 Difference]: Finished difference Result 334 states and 355 transitions. [2024-11-28 02:15:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 02:15:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.6037735849056602) internal successors, (191), 53 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2024-11-28 02:15:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:45,353 INFO L225 Difference]: With dead ends: 334 [2024-11-28 02:15:45,354 INFO L226 Difference]: Without dead ends: 203 [2024-11-28 02:15:45,354 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=299, Invalid=5251, Unknown=0, NotChecked=0, Total=5550 [2024-11-28 02:15:45,355 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 167 mSDsluCounter, 2801 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 2883 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:45,355 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 2883 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2128 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 02:15:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-28 02:15:45,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 197. [2024-11-28 02:15:45,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0714285714285714) internal successors, (210), 196 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 210 transitions. [2024-11-28 02:15:45,361 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 210 transitions. Word has length 99 [2024-11-28 02:15:45,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:45,361 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 210 transitions. [2024-11-28 02:15:45,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.6037735849056602) internal successors, (191), 53 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:45,362 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 210 transitions. [2024-11-28 02:15:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-28 02:15:45,363 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:45,363 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:45,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 02:15:45,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 02:15:45,564 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:45,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:45,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1717402952, now seen corresponding path program 16 times [2024-11-28 02:15:45,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:45,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776238710] [2024-11-28 02:15:45,565 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:15:45,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:45,596 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:15:45,596 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 105 proven. 204 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:46,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:46,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776238710] [2024-11-28 02:15:46,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776238710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:46,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195618873] [2024-11-28 02:15:46,429 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:15:46,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:46,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:46,431 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:46,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 02:15:46,687 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:15:46,687 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:46,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-28 02:15:46,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 136 proven. 173 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:47,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:47,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 02:15:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 136 proven. 173 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:47,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195618873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:47,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:47,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2024-11-28 02:15:47,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691482563] [2024-11-28 02:15:47,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:47,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 02:15:47,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:47,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 02:15:47,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 02:15:47,818 INFO L87 Difference]: Start difference. First operand 197 states and 210 transitions. Second operand has 39 states, 38 states have (on average 4.2105263157894735) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:49,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:49,459 INFO L93 Difference]: Finished difference Result 251 states and 265 transitions. [2024-11-28 02:15:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 02:15:49,459 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.2105263157894735) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-11-28 02:15:49,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:49,460 INFO L225 Difference]: With dead ends: 251 [2024-11-28 02:15:49,460 INFO L226 Difference]: Without dead ends: 251 [2024-11-28 02:15:49,461 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 181 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=342, Invalid=2964, Unknown=0, NotChecked=0, Total=3306 [2024-11-28 02:15:49,461 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 176 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:49,463 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 1600 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1617 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 02:15:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-28 02:15:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 207. [2024-11-28 02:15:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0728155339805825) internal successors, (221), 206 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 221 transitions. [2024-11-28 02:15:49,468 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 221 transitions. Word has length 103 [2024-11-28 02:15:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:49,468 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 221 transitions. [2024-11-28 02:15:49,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.2105263157894735) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:49,469 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 221 transitions. [2024-11-28 02:15:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-28 02:15:49,470 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:49,470 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:49,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 02:15:49,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-28 02:15:49,671 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:49,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:49,671 INFO L85 PathProgramCache]: Analyzing trace with hash 751681798, now seen corresponding path program 17 times [2024-11-28 02:15:49,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:49,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613267298] [2024-11-28 02:15:49,672 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:15:49,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:49,724 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-28 02:15:49,724 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:51,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:51,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613267298] [2024-11-28 02:15:51,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613267298] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:51,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074073896] [2024-11-28 02:15:51,115 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:15:51,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:51,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:51,117 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:51,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 02:15:51,461 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-28 02:15:51,462 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:51,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-28 02:15:51,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:51,870 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 02:15:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:52,047 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:52,140 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 02:15:52,142 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 02:15:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:52,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074073896] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:52,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:52,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 48 [2024-11-28 02:15:52,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467539651] [2024-11-28 02:15:52,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:52,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-28 02:15:52,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:52,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-28 02:15:52,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 02:15:52,305 INFO L87 Difference]: Start difference. First operand 207 states and 221 transitions. Second operand has 48 states, 48 states have (on average 3.4166666666666665) internal successors, (164), 48 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:54,066 INFO L93 Difference]: Finished difference Result 367 states and 390 transitions. [2024-11-28 02:15:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-28 02:15:54,067 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.4166666666666665) internal successors, (164), 48 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2024-11-28 02:15:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:54,067 INFO L225 Difference]: With dead ends: 367 [2024-11-28 02:15:54,067 INFO L226 Difference]: Without dead ends: 221 [2024-11-28 02:15:54,068 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=282, Invalid=4688, Unknown=0, NotChecked=0, Total=4970 [2024-11-28 02:15:54,068 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 190 mSDsluCounter, 2382 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 1939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:54,068 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 2473 Invalid, 1939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1929 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 02:15:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-28 02:15:54,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 215. [2024-11-28 02:15:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0700934579439252) internal successors, (229), 214 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 229 transitions. [2024-11-28 02:15:54,074 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 229 transitions. Word has length 108 [2024-11-28 02:15:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:54,074 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 229 transitions. [2024-11-28 02:15:54,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.4166666666666665) internal successors, (164), 48 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 229 transitions. [2024-11-28 02:15:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-28 02:15:54,076 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:54,076 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:54,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-28 02:15:54,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-28 02:15:54,277 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:15:54,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:54,277 INFO L85 PathProgramCache]: Analyzing trace with hash 384783359, now seen corresponding path program 18 times [2024-11-28 02:15:54,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:54,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725789206] [2024-11-28 02:15:54,277 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:15:54,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:54,351 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 02:15:54,351 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 136 proven. 252 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:55,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:55,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725789206] [2024-11-28 02:15:55,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725789206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:55,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029703160] [2024-11-28 02:15:55,980 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:15:55,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:55,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:55,982 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:55,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 02:15:56,410 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 02:15:56,410 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:56,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-28 02:15:56,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 171 proven. 217 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:57,044 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:58,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 02:15:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 171 proven. 217 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:58,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029703160] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:58,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:58,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 25] total 58 [2024-11-28 02:15:58,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95166173] [2024-11-28 02:15:58,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:58,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-28 02:15:58,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:58,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-28 02:15:58,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2979, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 02:15:58,339 INFO L87 Difference]: Start difference. First operand 215 states and 229 transitions. Second operand has 59 states, 58 states have (on average 4.0) internal successors, (232), 59 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:59,811 INFO L93 Difference]: Finished difference Result 274 states and 289 transitions. [2024-11-28 02:15:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-28 02:15:59,811 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 4.0) internal successors, (232), 59 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2024-11-28 02:15:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:59,813 INFO L225 Difference]: With dead ends: 274 [2024-11-28 02:15:59,813 INFO L226 Difference]: Without dead ends: 274 [2024-11-28 02:15:59,814 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 185 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2654 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=957, Invalid=5363, Unknown=0, NotChecked=0, Total=6320 [2024-11-28 02:15:59,814 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 309 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:59,814 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 693 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:15:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-28 02:15:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 225. [2024-11-28 02:15:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0714285714285714) internal successors, (240), 224 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 240 transitions. [2024-11-28 02:15:59,821 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 240 transitions. Word has length 112 [2024-11-28 02:15:59,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:59,822 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 240 transitions. [2024-11-28 02:15:59,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 4.0) internal successors, (232), 59 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:59,822 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 240 transitions. [2024-11-28 02:15:59,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-28 02:15:59,823 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:59,824 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:59,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 02:16:00,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:00,024 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:16:00,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:00,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1023648799, now seen corresponding path program 19 times [2024-11-28 02:16:00,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:16:00,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271682758] [2024-11-28 02:16:00,025 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:16:00,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:16:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 29 proven. 406 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:01,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:16:01,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271682758] [2024-11-28 02:16:01,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271682758] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:16:01,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610062106] [2024-11-28 02:16:01,498 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:16:01,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:01,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:01,500 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:01,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 02:16:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:01,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-28 02:16:01,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:02,107 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 02:16:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 29 proven. 406 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:02,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:02,391 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 02:16:02,397 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 02:16:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 29 proven. 406 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:02,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610062106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:02,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:16:02,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 50 [2024-11-28 02:16:02,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217748144] [2024-11-28 02:16:02,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:02,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-28 02:16:02,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:16:02,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-28 02:16:02,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 02:16:02,543 INFO L87 Difference]: Start difference. First operand 225 states and 240 transitions. Second operand has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:04,181 INFO L93 Difference]: Finished difference Result 400 states and 425 transitions. [2024-11-28 02:16:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-28 02:16:04,181 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2024-11-28 02:16:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:04,182 INFO L225 Difference]: With dead ends: 400 [2024-11-28 02:16:04,182 INFO L226 Difference]: Without dead ends: 239 [2024-11-28 02:16:04,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=302, Invalid=5398, Unknown=0, NotChecked=0, Total=5700 [2024-11-28 02:16:04,183 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 159 mSDsluCounter, 2894 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:04,183 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 2994 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2258 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 02:16:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-28 02:16:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 233. [2024-11-28 02:16:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0689655172413792) internal successors, (248), 232 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:04,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 248 transitions. [2024-11-28 02:16:04,186 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 248 transitions. Word has length 117 [2024-11-28 02:16:04,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:04,186 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 248 transitions. [2024-11-28 02:16:04,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:04,186 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 248 transitions. [2024-11-28 02:16:04,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-28 02:16:04,187 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:04,187 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:04,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 02:16:04,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:04,388 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:16:04,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1510647482, now seen corresponding path program 20 times [2024-11-28 02:16:04,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:16:04,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144662964] [2024-11-28 02:16:04,388 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:16:04,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:16:04,419 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:16:04,419 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 153 proven. 323 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:05,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:16:05,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144662964] [2024-11-28 02:16:05,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144662964] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:16:05,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127099380] [2024-11-28 02:16:05,872 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:16:05,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:05,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:05,874 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:05,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 02:16:06,097 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:16:06,098 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:06,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-28 02:16:06,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 190 proven. 286 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:06,777 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:07,656 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 02:16:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 190 proven. 286 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:08,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127099380] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:08,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:16:08,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 60 [2024-11-28 02:16:08,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467939776] [2024-11-28 02:16:08,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:08,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-28 02:16:08,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:16:08,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-28 02:16:08,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=3271, Unknown=0, NotChecked=0, Total=3660 [2024-11-28 02:16:08,042 INFO L87 Difference]: Start difference. First operand 233 states and 248 transitions. Second operand has 61 states, 60 states have (on average 3.9833333333333334) internal successors, (239), 61 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:10,201 INFO L93 Difference]: Finished difference Result 297 states and 313 transitions. [2024-11-28 02:16:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 02:16:10,202 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 3.9833333333333334) internal successors, (239), 61 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2024-11-28 02:16:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:10,205 INFO L225 Difference]: With dead ends: 297 [2024-11-28 02:16:10,205 INFO L226 Difference]: Without dead ends: 297 [2024-11-28 02:16:10,206 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 198 SyntacticMatches, 12 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2650 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=734, Invalid=6576, Unknown=0, NotChecked=0, Total=7310 [2024-11-28 02:16:10,207 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 355 mSDsluCounter, 2332 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:10,207 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 2428 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 02:16:10,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-11-28 02:16:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 243. [2024-11-28 02:16:10,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0702479338842976) internal successors, (259), 242 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 259 transitions. [2024-11-28 02:16:10,238 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 259 transitions. Word has length 121 [2024-11-28 02:16:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:10,238 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 259 transitions. [2024-11-28 02:16:10,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 3.9833333333333334) internal successors, (239), 61 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 259 transitions. [2024-11-28 02:16:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-28 02:16:10,253 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:10,253 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:10,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 02:16:10,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-28 02:16:10,454 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:16:10,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:10,455 INFO L85 PathProgramCache]: Analyzing trace with hash 589353784, now seen corresponding path program 21 times [2024-11-28 02:16:10,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:16:10,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040121352] [2024-11-28 02:16:10,455 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:16:10,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:16:10,528 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-28 02:16:10,528 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 496 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:12,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:16:12,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040121352] [2024-11-28 02:16:12,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040121352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:16:12,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515378884] [2024-11-28 02:16:12,091 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:16:12,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:12,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:12,094 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:12,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 02:16:12,583 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-28 02:16:12,584 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:12,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-11-28 02:16:12,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:12,846 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 02:16:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 496 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:13,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:13,759 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 02:16:13,764 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 02:16:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 496 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:14,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515378884] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:14,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:16:14,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 32] total 65 [2024-11-28 02:16:14,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593056764] [2024-11-28 02:16:14,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:14,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-28 02:16:14,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:16:14,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-28 02:16:14,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3973, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 02:16:14,392 INFO L87 Difference]: Start difference. First operand 243 states and 259 transitions. Second operand has 65 states, 65 states have (on average 3.769230769230769) internal successors, (245), 65 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:16,663 INFO L93 Difference]: Finished difference Result 433 states and 460 transitions. [2024-11-28 02:16:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-28 02:16:16,663 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.769230769230769) internal successors, (245), 65 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2024-11-28 02:16:16,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:16,665 INFO L225 Difference]: With dead ends: 433 [2024-11-28 02:16:16,665 INFO L226 Difference]: Without dead ends: 257 [2024-11-28 02:16:16,666 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=371, Invalid=8185, Unknown=0, NotChecked=0, Total=8556 [2024-11-28 02:16:16,667 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 250 mSDsluCounter, 3875 mSDsCounter, 0 mSdLazyCounter, 2965 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 3984 SdHoareTripleChecker+Invalid, 2976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:16,668 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 3984 Invalid, 2976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2965 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 02:16:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-11-28 02:16:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 251. [2024-11-28 02:16:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.068) internal successors, (267), 250 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:16,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 267 transitions. [2024-11-28 02:16:16,677 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 267 transitions. Word has length 126 [2024-11-28 02:16:16,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:16,677 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 267 transitions. [2024-11-28 02:16:16,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.769230769230769) internal successors, (245), 65 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:16,678 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 267 transitions. [2024-11-28 02:16:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-28 02:16:16,682 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:16,682 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:16,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 02:16:16,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:16,883 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:16:16,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:16,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1568340465, now seen corresponding path program 22 times [2024-11-28 02:16:16,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:16:16,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622720688] [2024-11-28 02:16:16,884 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:16:16,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:16:16,916 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:16:16,916 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 210 proven. 363 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:17,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:16:17,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622720688] [2024-11-28 02:16:17,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622720688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:16:17,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480268169] [2024-11-28 02:16:17,839 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:16:17,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:17,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:17,841 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:17,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 02:16:18,280 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:16:18,280 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:18,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-28 02:16:18,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 253 proven. 320 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:18,694 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:19,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 02:16:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 253 proven. 320 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:19,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480268169] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:19,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:16:19,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2024-11-28 02:16:19,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429279991] [2024-11-28 02:16:19,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:19,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-28 02:16:19,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:16:19,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-28 02:16:19,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 02:16:19,829 INFO L87 Difference]: Start difference. First operand 251 states and 267 transitions. Second operand has 48 states, 47 states have (on average 4.297872340425532) internal successors, (202), 48 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:21,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:21,916 INFO L93 Difference]: Finished difference Result 320 states and 337 transitions. [2024-11-28 02:16:21,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 02:16:21,917 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.297872340425532) internal successors, (202), 48 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2024-11-28 02:16:21,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:21,918 INFO L225 Difference]: With dead ends: 320 [2024-11-28 02:16:21,918 INFO L226 Difference]: Without dead ends: 320 [2024-11-28 02:16:21,919 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 229 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=516, Invalid=4740, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 02:16:21,919 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 332 mSDsluCounter, 2172 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 2277 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:21,920 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 2277 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2368 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 02:16:21,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-28 02:16:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 261. [2024-11-28 02:16:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0692307692307692) internal successors, (278), 260 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 278 transitions. [2024-11-28 02:16:21,930 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 278 transitions. Word has length 130 [2024-11-28 02:16:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:21,931 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 278 transitions. [2024-11-28 02:16:21,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.297872340425532) internal successors, (202), 48 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:21,932 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 278 transitions. [2024-11-28 02:16:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-28 02:16:21,933 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:21,934 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:21,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 02:16:22,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:22,135 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:16:22,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:22,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2115246739, now seen corresponding path program 23 times [2024-11-28 02:16:22,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:16:22,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462962642] [2024-11-28 02:16:22,136 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:16:22,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:16:22,193 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-28 02:16:22,193 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 35 proven. 595 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:23,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:16:23,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462962642] [2024-11-28 02:16:23,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462962642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:16:23,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692197912] [2024-11-28 02:16:23,875 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:16:23,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:23,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:23,877 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:23,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 02:16:24,407 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-28 02:16:24,407 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:24,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-11-28 02:16:24,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:24,425 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 02:16:25,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-28 02:16:31,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:16:31,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2024-11-28 02:16:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 231 proven. 394 refuted. 5 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:31,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:34,431 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 02:16:34,436 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 02:16:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 231 proven. 399 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:37,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692197912] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:37,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:16:37,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 34, 34] total 103 [2024-11-28 02:16:37,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487777972] [2024-11-28 02:16:37,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:37,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-11-28 02:16:37,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:16:37,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-11-28 02:16:37,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=9686, Unknown=1, NotChecked=0, Total=10506 [2024-11-28 02:16:37,589 INFO L87 Difference]: Start difference. First operand 261 states and 278 transitions. Second operand has 103 states, 103 states have (on average 3.737864077669903) internal successors, (385), 103 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:17:07,869 INFO L93 Difference]: Finished difference Result 531 states and 561 transitions. [2024-11-28 02:17:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-28 02:17:07,869 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.737864077669903) internal successors, (385), 103 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2024-11-28 02:17:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:17:07,871 INFO L225 Difference]: With dead ends: 531 [2024-11-28 02:17:07,871 INFO L226 Difference]: Without dead ends: 340 [2024-11-28 02:17:07,873 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7203 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=1873, Invalid=24858, Unknown=1, NotChecked=0, Total=26732 [2024-11-28 02:17:07,874 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 1091 mSDsluCounter, 3898 mSDsCounter, 0 mSdLazyCounter, 4324 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 4004 SdHoareTripleChecker+Invalid, 4327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4324 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:17:07,874 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 4004 Invalid, 4327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4324 Invalid, 3 Unknown, 0 Unchecked, 5.8s Time] [2024-11-28 02:17:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2024-11-28 02:17:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 279. [2024-11-28 02:17:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.0683453237410072) internal successors, (297), 278 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 297 transitions. [2024-11-28 02:17:07,886 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 297 transitions. Word has length 135 [2024-11-28 02:17:07,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:17:07,887 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 297 transitions. [2024-11-28 02:17:07,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.737864077669903) internal successors, (385), 103 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 297 transitions. [2024-11-28 02:17:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-28 02:17:07,889 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:17:07,889 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:17:07,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 02:17:08,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-28 02:17:08,090 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:17:08,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:17:08,091 INFO L85 PathProgramCache]: Analyzing trace with hash 270415466, now seen corresponding path program 24 times [2024-11-28 02:17:08,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:17:08,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299582076] [2024-11-28 02:17:08,091 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:17:08,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:17:08,230 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 02:17:08,230 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:17:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 38 proven. 703 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:17:11,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:17:11,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299582076] [2024-11-28 02:17:11,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299582076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:17:11,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959743340] [2024-11-28 02:17:11,222 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:17:11,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:17:11,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:17:11,224 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:17:11,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 02:17:12,299 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 02:17:12,299 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:17:12,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 152 conjuncts are in the unsatisfiable core [2024-11-28 02:17:12,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:17:13,467 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 02:17:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 38 proven. 703 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:17:14,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:17:14,872 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 02:17:14,875 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 02:17:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 38 proven. 703 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:17:16,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959743340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:17:16,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:17:16,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 37, 36] total 91 [2024-11-28 02:17:16,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799650033] [2024-11-28 02:17:16,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:17:16,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-28 02:17:16,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:17:16,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-28 02:17:16,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=7859, Unknown=0, NotChecked=0, Total=8190 [2024-11-28 02:17:16,114 INFO L87 Difference]: Start difference. First operand 279 states and 297 transitions. Second operand has 91 states, 91 states have (on average 3.769230769230769) internal successors, (343), 91 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:17:21,952 INFO L93 Difference]: Finished difference Result 499 states and 530 transitions. [2024-11-28 02:17:21,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-28 02:17:21,953 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.769230769230769) internal successors, (343), 91 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2024-11-28 02:17:21,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:17:21,954 INFO L225 Difference]: With dead ends: 499 [2024-11-28 02:17:21,954 INFO L226 Difference]: Without dead ends: 293 [2024-11-28 02:17:21,955 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4936 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=615, Invalid=15135, Unknown=0, NotChecked=0, Total=15750 [2024-11-28 02:17:21,958 INFO L435 NwaCegarLoop]: 125 mSDtfsCounter, 306 mSDsluCounter, 7006 mSDsCounter, 0 mSdLazyCounter, 5682 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 7131 SdHoareTripleChecker+Invalid, 5695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 5682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:17:21,958 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 7131 Invalid, 5695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 5682 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-28 02:17:21,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-11-28 02:17:21,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 287. [2024-11-28 02:17:21,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.0664335664335665) internal successors, (305), 286 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:21,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 305 transitions. [2024-11-28 02:17:21,966 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 305 transitions. Word has length 144 [2024-11-28 02:17:21,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:17:21,966 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 305 transitions. [2024-11-28 02:17:21,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.769230769230769) internal successors, (343), 91 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:21,967 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 305 transitions. [2024-11-28 02:17:21,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-28 02:17:21,968 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:17:21,969 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:17:21,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-28 02:17:22,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-28 02:17:22,169 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:17:22,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:17:22,170 INFO L85 PathProgramCache]: Analyzing trace with hash 312180963, now seen corresponding path program 25 times [2024-11-28 02:17:22,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:17:22,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48346236] [2024-11-28 02:17:22,170 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:17:22,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:17:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:17:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 300 proven. 494 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:17:24,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:17:24,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48346236] [2024-11-28 02:17:24,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48346236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:17:24,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188809362] [2024-11-28 02:17:24,125 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:17:24,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:17:24,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:17:24,127 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:17:24,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 02:17:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:17:24,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-11-28 02:17:24,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:17:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 351 proven. 443 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:17:25,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:17:27,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 02:17:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 351 proven. 443 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:17:27,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188809362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:17:27,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:17:27,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 71 [2024-11-28 02:17:27,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80811845] [2024-11-28 02:17:27,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:17:27,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-28 02:17:27,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:17:27,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-28 02:17:27,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=4546, Unknown=0, NotChecked=0, Total=5112 [2024-11-28 02:17:27,703 INFO L87 Difference]: Start difference. First operand 287 states and 305 transitions. Second operand has 72 states, 71 states have (on average 4.197183098591549) internal successors, (298), 72 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:31,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:17:31,101 INFO L93 Difference]: Finished difference Result 366 states and 385 transitions. [2024-11-28 02:17:31,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-28 02:17:31,101 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 4.197183098591549) internal successors, (298), 72 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2024-11-28 02:17:31,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:17:31,103 INFO L225 Difference]: With dead ends: 366 [2024-11-28 02:17:31,103 INFO L226 Difference]: Without dead ends: 366 [2024-11-28 02:17:31,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 245 SyntacticMatches, 14 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3872 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=997, Invalid=9103, Unknown=0, NotChecked=0, Total=10100 [2024-11-28 02:17:31,105 INFO L435 NwaCegarLoop]: 120 mSDtfsCounter, 431 mSDsluCounter, 3064 mSDsCounter, 0 mSdLazyCounter, 3044 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 3184 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:17:31,105 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 3184 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3044 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-28 02:17:31,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2024-11-28 02:17:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 297. [2024-11-28 02:17:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.0675675675675675) internal successors, (316), 296 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 316 transitions. [2024-11-28 02:17:31,112 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 316 transitions. Word has length 148 [2024-11-28 02:17:31,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:17:31,113 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 316 transitions. [2024-11-28 02:17:31,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 4.197183098591549) internal successors, (298), 72 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:31,113 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 316 transitions. [2024-11-28 02:17:31,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-28 02:17:31,115 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:17:31,115 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:17:31,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-28 02:17:31,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-28 02:17:31,316 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:17:31,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:17:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1193534907, now seen corresponding path program 26 times [2024-11-28 02:17:31,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:17:31,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517172595] [2024-11-28 02:17:31,317 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:17:31,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:17:31,373 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:17:31,374 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:17:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 41 proven. 820 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:17:33,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:17:33,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517172595] [2024-11-28 02:17:33,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517172595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:17:33,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253487193] [2024-11-28 02:17:33,418 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:17:33,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:17:33,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:17:33,420 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:17:33,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 02:17:33,728 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:17:33,728 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:17:33,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-11-28 02:17:33,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:17:34,837 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 02:17:37,384 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:17:37,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:17:37,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2024-11-28 02:17:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 41 proven. 820 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:17:37,397 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:17:38,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 02:17:38,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-28 02:17:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 41 proven. 820 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:17:40,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253487193] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:17:40,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:17:40,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 97 [2024-11-28 02:17:40,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274784312] [2024-11-28 02:17:40,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:17:40,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-28 02:17:40,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:17:40,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-28 02:17:40,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=8959, Unknown=0, NotChecked=0, Total=9312 [2024-11-28 02:17:40,558 INFO L87 Difference]: Start difference. First operand 297 states and 316 transitions. Second operand has 97 states, 97 states have (on average 3.6907216494845363) internal successors, (358), 97 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:17:46,104 INFO L93 Difference]: Finished difference Result 532 states and 565 transitions. [2024-11-28 02:17:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-28 02:17:46,104 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.6907216494845363) internal successors, (358), 97 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2024-11-28 02:17:46,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:17:46,106 INFO L225 Difference]: With dead ends: 532 [2024-11-28 02:17:46,106 INFO L226 Difference]: Without dead ends: 311 [2024-11-28 02:17:46,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5493 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=622, Invalid=16148, Unknown=0, NotChecked=0, Total=16770 [2024-11-28 02:17:46,112 INFO L435 NwaCegarLoop]: 136 mSDtfsCounter, 327 mSDsluCounter, 5522 mSDsCounter, 0 mSdLazyCounter, 4645 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 5658 SdHoareTripleChecker+Invalid, 4660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 4645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:17:46,113 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 5658 Invalid, 4660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 4645 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-28 02:17:46,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-11-28 02:17:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 305. [2024-11-28 02:17:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.0657894736842106) internal successors, (324), 304 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 324 transitions. [2024-11-28 02:17:46,122 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 324 transitions. Word has length 153 [2024-11-28 02:17:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:17:46,122 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 324 transitions. [2024-11-28 02:17:46,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.6907216494845363) internal successors, (358), 97 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 324 transitions. [2024-11-28 02:17:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-11-28 02:17:46,125 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:17:46,126 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:17:46,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 02:17:46,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:17:46,327 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:17:46,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:17:46,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1924158306, now seen corresponding path program 27 times [2024-11-28 02:17:46,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:17:46,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898502845] [2024-11-28 02:17:46,328 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:17:46,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:17:46,421 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-28 02:17:46,421 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:17:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 399 proven. 483 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-28 02:17:49,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:17:49,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898502845] [2024-11-28 02:17:49,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898502845] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:17:49,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566887796] [2024-11-28 02:17:49,409 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:17:49,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:17:49,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:17:49,412 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:17:49,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 02:17:50,590 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-28 02:17:50,590 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:17:50,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 154 conjuncts are in the unsatisfiable core [2024-11-28 02:17:50,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:17:50,608 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 02:17:51,698 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 02:17:58,438 INFO L349 Elim1Store]: treesize reduction 12, result has 72.7 percent of original size [2024-11-28 02:17:58,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 50 [2024-11-28 02:17:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 389 proven. 493 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-28 02:17:59,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:18:42,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 53 [2024-11-28 02:18:42,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2024-11-28 02:18:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 162 proven. 720 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-28 02:18:46,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566887796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:18:46,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:18:46,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 46, 46] total 129 [2024-11-28 02:18:46,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853575242] [2024-11-28 02:18:46,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:18:46,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2024-11-28 02:18:46,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:18:46,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2024-11-28 02:18:46,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1149, Invalid=15618, Unknown=3, NotChecked=0, Total=16770 [2024-11-28 02:18:46,369 INFO L87 Difference]: Start difference. First operand 305 states and 324 transitions. Second operand has 130 states, 129 states have (on average 3.1705426356589146) internal successors, (409), 130 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:22:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:22:03,273 INFO L93 Difference]: Finished difference Result 410 states and 433 transitions. [2024-11-28 02:22:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2024-11-28 02:22:03,273 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 129 states have (on average 3.1705426356589146) internal successors, (409), 130 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2024-11-28 02:22:03,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:22:03,275 INFO L225 Difference]: With dead ends: 410 [2024-11-28 02:22:03,275 INFO L226 Difference]: Without dead ends: 410 [2024-11-28 02:22:03,278 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18143 ImplicationChecksByTransitivity, 243.8s TimeCoverageRelationStatistics Valid=7628, Invalid=55618, Unknown=6, NotChecked=0, Total=63252 [2024-11-28 02:22:03,279 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 908 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 2793 mSolverCounterSat, 93 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2793 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:22:03,280 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1221 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2793 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2024-11-28 02:22:03,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2024-11-28 02:22:03,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 345. [2024-11-28 02:22:03,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.069767441860465) internal successors, (368), 344 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:22:03,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 368 transitions. [2024-11-28 02:22:03,291 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 368 transitions. Word has length 157 [2024-11-28 02:22:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:22:03,294 INFO L471 AbstractCegarLoop]: Abstraction has 345 states and 368 transitions. [2024-11-28 02:22:03,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 129 states have (on average 3.1705426356589146) internal successors, (409), 130 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:22:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 368 transitions. [2024-11-28 02:22:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2024-11-28 02:22:03,295 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:22:03,296 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 15, 15, 15, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:22:03,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 02:22:03,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:22:03,497 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:22:03,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:22:03,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1649218590, now seen corresponding path program 28 times [2024-11-28 02:22:03,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:22:03,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513593358] [2024-11-28 02:22:03,497 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:22:03,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:22:03,544 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:22:03,544 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:22:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 266 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:22:05,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:22:05,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513593358] [2024-11-28 02:22:05,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513593358] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:22:05,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802598290] [2024-11-28 02:22:05,551 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:22:05,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:22:05,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:22:05,553 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:22:05,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 02:22:05,909 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:22:05,909 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:22:05,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 176 conjuncts are in the unsatisfiable core [2024-11-28 02:22:05,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:22:06,180 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 02:22:06,409 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 02:22:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 266 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:22:06,413 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:22:06,585 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 02:22:06,588 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 02:22:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 266 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:22:06,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802598290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:22:06,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:22:06,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 45 [2024-11-28 02:22:06,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265709996] [2024-11-28 02:22:06,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:22:06,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 02:22:06,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:22:06,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 02:22:06,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1876, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 02:22:06,785 INFO L87 Difference]: Start difference. First operand 345 states and 368 transitions. Second operand has 45 states, 45 states have (on average 3.8444444444444446) internal successors, (173), 45 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:22:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:22:10,444 INFO L93 Difference]: Finished difference Result 595 states and 633 transitions. [2024-11-28 02:22:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-28 02:22:10,445 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.8444444444444446) internal successors, (173), 45 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2024-11-28 02:22:10,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:22:10,447 INFO L225 Difference]: With dead ends: 595 [2024-11-28 02:22:10,447 INFO L226 Difference]: Without dead ends: 359 [2024-11-28 02:22:10,447 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=233, Invalid=5619, Unknown=0, NotChecked=0, Total=5852 [2024-11-28 02:22:10,448 INFO L435 NwaCegarLoop]: 145 mSDtfsCounter, 192 mSDsluCounter, 5359 mSDsCounter, 0 mSdLazyCounter, 3966 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 5504 SdHoareTripleChecker+Invalid, 3981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:22:10,448 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 5504 Invalid, 3981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3966 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 02:22:10,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2024-11-28 02:22:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 353. [2024-11-28 02:22:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.0681818181818181) internal successors, (376), 352 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:22:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 376 transitions. [2024-11-28 02:22:10,455 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 376 transitions. Word has length 177 [2024-11-28 02:22:10,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:22:10,455 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 376 transitions. [2024-11-28 02:22:10,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.8444444444444446) internal successors, (173), 45 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:22:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 376 transitions. [2024-11-28 02:22:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-11-28 02:22:10,457 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:22:10,457 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 16, 16, 16, 16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:22:10,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-28 02:22:10,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:22:10,658 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:22:10,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:22:10,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1316318071, now seen corresponding path program 29 times [2024-11-28 02:22:10,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:22:10,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806028025] [2024-11-28 02:22:10,659 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:22:10,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:22:10,718 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2024-11-28 02:22:10,719 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:22:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1297 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:22:15,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:22:15,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806028025] [2024-11-28 02:22:15,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806028025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:22:15,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513155898] [2024-11-28 02:22:15,268 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:22:15,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:22:15,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:22:15,271 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:22:15,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 02:22:15,984 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2024-11-28 02:22:15,984 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:22:15,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 188 conjuncts are in the unsatisfiable core [2024-11-28 02:22:15,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:22:17,574 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 02:22:19,830 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 02:22:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 205 proven. 1081 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 02:22:20,060 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:22:20,377 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 02:22:20,380 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 02:22:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 205 proven. 1081 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 02:22:20,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513155898] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:22:20,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:22:20,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 42, 42] total 92 [2024-11-28 02:22:20,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889870570] [2024-11-28 02:22:20,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:22:20,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-28 02:22:20,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:22:20,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-28 02:22:20,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=8156, Unknown=0, NotChecked=0, Total=8372 [2024-11-28 02:22:20,791 INFO L87 Difference]: Start difference. First operand 353 states and 376 transitions. Second operand has 92 states, 92 states have (on average 3.8043478260869565) internal successors, (350), 92 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:22:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:22:34,789 INFO L93 Difference]: Finished difference Result 623 states and 662 transitions. [2024-11-28 02:22:34,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-28 02:22:34,789 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.8043478260869565) internal successors, (350), 92 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2024-11-28 02:22:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:22:34,791 INFO L225 Difference]: With dead ends: 623 [2024-11-28 02:22:34,791 INFO L226 Difference]: Without dead ends: 367 [2024-11-28 02:22:34,792 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4199 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=920, Invalid=22336, Unknown=0, NotChecked=0, Total=23256 [2024-11-28 02:22:34,793 INFO L435 NwaCegarLoop]: 139 mSDtfsCounter, 397 mSDsluCounter, 8440 mSDsCounter, 0 mSdLazyCounter, 8718 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 8579 SdHoareTripleChecker+Invalid, 8765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 8718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:22:34,793 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 8579 Invalid, 8765 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [47 Valid, 8718 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-11-28 02:22:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2024-11-28 02:22:34,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 361. [2024-11-28 02:22:34,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.0666666666666667) internal successors, (384), 360 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:22:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 384 transitions. [2024-11-28 02:22:34,800 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 384 transitions. Word has length 181 [2024-11-28 02:22:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:22:34,801 INFO L471 AbstractCegarLoop]: Abstraction has 361 states and 384 transitions. [2024-11-28 02:22:34,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.8043478260869565) internal successors, (350), 92 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:22:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 384 transitions. [2024-11-28 02:22:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2024-11-28 02:22:34,802 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:22:34,803 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 17, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:22:34,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-28 02:22:35,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:22:35,003 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:22:35,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:22:35,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1249874352, now seen corresponding path program 30 times [2024-11-28 02:22:35,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:22:35,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633342827] [2024-11-28 02:22:35,004 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:22:35,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:22:35,089 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-28 02:22:35,089 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:22:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 736 proven. 626 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:22:37,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:22:37,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633342827] [2024-11-28 02:22:37,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633342827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:22:37,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769744204] [2024-11-28 02:22:37,346 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:22:37,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:22:37,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:22:37,348 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:22:37,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 02:22:39,354 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-28 02:22:39,354 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:22:39,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 194 conjuncts are in the unsatisfiable core [2024-11-28 02:22:39,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:22:40,455 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 02:22:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 134 proven. 1225 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 02:22:42,092 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:22:43,709 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 02:22:43,711 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 02:22:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 134 proven. 1225 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 02:22:45,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769744204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:22:45,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:22:45,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 44] total 131 [2024-11-28 02:22:45,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777039829] [2024-11-28 02:22:45,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:22:45,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-11-28 02:22:45,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:22:45,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-11-28 02:22:45,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=722, Invalid=16308, Unknown=0, NotChecked=0, Total=17030 [2024-11-28 02:22:45,275 INFO L87 Difference]: Start difference. First operand 361 states and 384 transitions. Second operand has 131 states, 131 states have (on average 3.9618320610687023) internal successors, (519), 131 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:22:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:22:58,133 INFO L93 Difference]: Finished difference Result 646 states and 686 transitions. [2024-11-28 02:22:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-11-28 02:22:58,133 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.9618320610687023) internal successors, (519), 131 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2024-11-28 02:22:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:22:58,135 INFO L225 Difference]: With dead ends: 646 [2024-11-28 02:22:58,135 INFO L226 Difference]: Without dead ends: 375 [2024-11-28 02:22:58,137 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13765 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=2030, Invalid=39790, Unknown=0, NotChecked=0, Total=41820 [2024-11-28 02:22:58,138 INFO L435 NwaCegarLoop]: 146 mSDtfsCounter, 800 mSDsluCounter, 10047 mSDsCounter, 0 mSdLazyCounter, 9680 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 10193 SdHoareTripleChecker+Invalid, 9697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 9680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:22:58,138 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 10193 Invalid, 9697 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [17 Valid, 9680 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-11-28 02:22:58,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-28 02:22:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 369. [2024-11-28 02:22:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.065217391304348) internal successors, (392), 368 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:22:58,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 392 transitions. [2024-11-28 02:22:58,145 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 392 transitions. Word has length 185 [2024-11-28 02:22:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:22:58,146 INFO L471 AbstractCegarLoop]: Abstraction has 369 states and 392 transitions. [2024-11-28 02:22:58,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.9618320610687023) internal successors, (519), 131 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:22:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 392 transitions. [2024-11-28 02:22:58,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2024-11-28 02:22:58,147 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:22:58,147 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:22:58,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-28 02:22:58,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-28 02:22:58,348 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:22:58,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:22:58,349 INFO L85 PathProgramCache]: Analyzing trace with hash 953394007, now seen corresponding path program 31 times [2024-11-28 02:22:58,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:22:58,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416514248] [2024-11-28 02:22:58,351 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:22:58,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:22:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 53 proven. 1378 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:23:00,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:00,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416514248] [2024-11-28 02:23:00,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416514248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:00,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285234004] [2024-11-28 02:23:00,997 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:23:00,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:00,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:00,999 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:01,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 02:23:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:01,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 200 conjuncts are in the unsatisfiable core [2024-11-28 02:23:01,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:02,564 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 02:23:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 53 proven. 1378 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:23:02,947 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:03,158 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 02:23:03,160 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 02:23:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 53 proven. 1378 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:23:03,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285234004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:03,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:03,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 46, 46] total 74 [2024-11-28 02:23:03,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704170168] [2024-11-28 02:23:03,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:03,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-28 02:23:03,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:03,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-28 02:23:03,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=5196, Unknown=0, NotChecked=0, Total=5402 [2024-11-28 02:23:03,452 INFO L87 Difference]: Start difference. First operand 369 states and 392 transitions. Second operand has 74 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 74 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:09,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:23:09,481 INFO L93 Difference]: Finished difference Result 664 states and 705 transitions. [2024-11-28 02:23:09,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-28 02:23:09,481 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 74 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2024-11-28 02:23:09,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:23:09,483 INFO L225 Difference]: With dead ends: 664 [2024-11-28 02:23:09,483 INFO L226 Difference]: Without dead ends: 383 [2024-11-28 02:23:09,484 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2933 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=462, Invalid=12878, Unknown=0, NotChecked=0, Total=13340 [2024-11-28 02:23:09,484 INFO L435 NwaCegarLoop]: 172 mSDtfsCounter, 353 mSDsluCounter, 8106 mSDsCounter, 0 mSdLazyCounter, 6256 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 8278 SdHoareTripleChecker+Invalid, 6274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 6256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:23:09,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 8278 Invalid, 6274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 6256 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-28 02:23:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-11-28 02:23:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 377. [2024-11-28 02:23:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.0638297872340425) internal successors, (400), 376 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 400 transitions. [2024-11-28 02:23:09,492 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 400 transitions. Word has length 189 [2024-11-28 02:23:09,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:23:09,493 INFO L471 AbstractCegarLoop]: Abstraction has 377 states and 400 transitions. [2024-11-28 02:23:09,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 74 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 400 transitions. [2024-11-28 02:23:09,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2024-11-28 02:23:09,495 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:23:09,495 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:09,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 02:23:09,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-28 02:23:09,696 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:23:09,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:09,696 INFO L85 PathProgramCache]: Analyzing trace with hash -706180738, now seen corresponding path program 32 times [2024-11-28 02:23:09,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:09,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730125567] [2024-11-28 02:23:09,697 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:23:09,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:09,737 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:23:09,737 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 561 proven. 943 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:23:12,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:12,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730125567] [2024-11-28 02:23:12,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730125567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:12,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55280443] [2024-11-28 02:23:12,623 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:23:12,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:12,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:12,626 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:12,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 02:23:12,955 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:23:12,955 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:12,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 181 conjuncts are in the unsatisfiable core [2024-11-28 02:23:12,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 630 proven. 874 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:23:14,737 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:16,857 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 02:23:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 630 proven. 874 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:23:18,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55280443] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:18,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:18,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 92 [2024-11-28 02:23:18,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603884951] [2024-11-28 02:23:18,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:18,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-28 02:23:18,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:18,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-28 02:23:18,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=941, Invalid=7615, Unknown=0, NotChecked=0, Total=8556 [2024-11-28 02:23:18,066 INFO L87 Difference]: Start difference. First operand 377 states and 400 transitions. Second operand has 93 states, 92 states have (on average 4.163043478260869) internal successors, (383), 93 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:23,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:23:23,691 INFO L93 Difference]: Finished difference Result 481 states and 505 transitions. [2024-11-28 02:23:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-28 02:23:23,691 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 4.163043478260869) internal successors, (383), 93 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2024-11-28 02:23:23,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:23:23,694 INFO L225 Difference]: With dead ends: 481 [2024-11-28 02:23:23,694 INFO L226 Difference]: Without dead ends: 481 [2024-11-28 02:23:23,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 318 SyntacticMatches, 20 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6978 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1670, Invalid=16152, Unknown=0, NotChecked=0, Total=17822 [2024-11-28 02:23:23,695 INFO L435 NwaCegarLoop]: 160 mSDtfsCounter, 849 mSDsluCounter, 5281 mSDsCounter, 0 mSdLazyCounter, 5126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 5441 SdHoareTripleChecker+Invalid, 5128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:23:23,695 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 5441 Invalid, 5128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5126 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-28 02:23:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-11-28 02:23:23,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 387. [2024-11-28 02:23:23,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0647668393782384) internal successors, (411), 386 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 411 transitions. [2024-11-28 02:23:23,702 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 411 transitions. Word has length 193 [2024-11-28 02:23:23,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:23:23,702 INFO L471 AbstractCegarLoop]: Abstraction has 387 states and 411 transitions. [2024-11-28 02:23:23,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 4.163043478260869) internal successors, (383), 93 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:23:23,702 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 411 transitions. [2024-11-28 02:23:23,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2024-11-28 02:23:23,704 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:23:23,704 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:23,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-28 02:23:23,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-28 02:23:23,904 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:23:23,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:23,905 INFO L85 PathProgramCache]: Analyzing trace with hash 993723904, now seen corresponding path program 33 times [2024-11-28 02:23:23,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:23,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036140951] [2024-11-28 02:23:23,905 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:23:23,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:24,012 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-28 02:23:24,012 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 561 proven. 1035 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:23:28,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:28,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036140951] [2024-11-28 02:23:28,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036140951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:28,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24653903] [2024-11-28 02:23:28,154 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:23:28,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:28,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:28,156 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:28,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 02:23:30,239 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-28 02:23:30,239 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:30,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 214 conjuncts are in the unsatisfiable core [2024-11-28 02:23:30,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:31,788 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 02:23:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 56 proven. 1540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:23:34,288 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:36,867 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 02:23:36,869 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 02:23:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 56 proven. 1540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:23:39,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24653903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:39,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:39,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 49, 48] total 143 [2024-11-28 02:23:39,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128930381] [2024-11-28 02:23:39,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:39,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2024-11-28 02:23:39,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:39,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2024-11-28 02:23:39,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=19357, Unknown=0, NotChecked=0, Total=20306 [2024-11-28 02:23:39,507 INFO L87 Difference]: Start difference. First operand 387 states and 411 transitions. Second operand has 143 states, 143 states have (on average 3.909090909090909) internal successors, (559), 143 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:24:01,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:24:01,642 INFO L93 Difference]: Finished difference Result 797 states and 841 transitions. [2024-11-28 02:24:01,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-11-28 02:24:01,642 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 3.909090909090909) internal successors, (559), 143 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2024-11-28 02:24:01,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:24:01,643 INFO L225 Difference]: With dead ends: 797 [2024-11-28 02:24:01,643 INFO L226 Difference]: Without dead ends: 501 [2024-11-28 02:24:01,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16451 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=4124, Invalid=57132, Unknown=0, NotChecked=0, Total=61256 [2024-11-28 02:24:01,645 INFO L435 NwaCegarLoop]: 161 mSDtfsCounter, 1184 mSDsluCounter, 10874 mSDsCounter, 0 mSdLazyCounter, 10807 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 11035 SdHoareTripleChecker+Invalid, 10862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 10807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:24:01,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1184 Valid, 11035 Invalid, 10862 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [55 Valid, 10807 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-28 02:24:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2024-11-28 02:24:01,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 405. [2024-11-28 02:24:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.0643564356435644) internal successors, (430), 404 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:24:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 430 transitions. [2024-11-28 02:24:01,650 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 430 transitions. Word has length 198 [2024-11-28 02:24:01,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:24:01,650 INFO L471 AbstractCegarLoop]: Abstraction has 405 states and 430 transitions. [2024-11-28 02:24:01,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 3.909090909090909) internal successors, (559), 143 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:24:01,651 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 430 transitions. [2024-11-28 02:24:01,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2024-11-28 02:24:01,652 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:24:01,652 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:24:01,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-28 02:24:01,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-28 02:24:01,857 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:24:01,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:24:01,857 INFO L85 PathProgramCache]: Analyzing trace with hash -874274651, now seen corresponding path program 34 times [2024-11-28 02:24:01,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:24:01,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832466074] [2024-11-28 02:24:01,858 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:24:01,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:24:01,909 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:24:01,909 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:24:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 684 proven. 1086 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:24:05,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:24:05,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832466074] [2024-11-28 02:24:05,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832466074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:24:05,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280397997] [2024-11-28 02:24:05,723 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:24:05,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:24:05,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:24:05,725 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:24:05,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-28 02:24:06,113 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:24:06,113 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:24:06,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 218 conjuncts are in the unsatisfiable core [2024-11-28 02:24:06,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:24:08,141 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 02:24:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 59 proven. 1711 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:24:10,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:24:11,194 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 02:24:11,196 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 02:24:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 59 proven. 1711 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:24:11,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280397997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:24:11,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:24:11,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 50, 50] total 103 [2024-11-28 02:24:11,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613328519] [2024-11-28 02:24:11,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:24:11,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-11-28 02:24:11,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:24:11,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-11-28 02:24:11,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=9868, Unknown=0, NotChecked=0, Total=10506 [2024-11-28 02:24:11,659 INFO L87 Difference]: Start difference. First operand 405 states and 430 transitions. Second operand has 103 states, 103 states have (on average 3.854368932038835) internal successors, (397), 103 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:24:27,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:24:27,683 INFO L93 Difference]: Finished difference Result 835 states and 881 transitions. [2024-11-28 02:24:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2024-11-28 02:24:27,684 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.854368932038835) internal successors, (397), 103 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2024-11-28 02:24:27,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:24:27,685 INFO L225 Difference]: With dead ends: 835 [2024-11-28 02:24:27,685 INFO L226 Difference]: Without dead ends: 524 [2024-11-28 02:24:27,686 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7906 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1368, Invalid=31212, Unknown=0, NotChecked=0, Total=32580 [2024-11-28 02:24:27,687 INFO L435 NwaCegarLoop]: 170 mSDtfsCounter, 698 mSDsluCounter, 10519 mSDsCounter, 0 mSdLazyCounter, 10831 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 10689 SdHoareTripleChecker+Invalid, 10850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 10831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:24:27,687 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 10689 Invalid, 10850 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [19 Valid, 10831 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2024-11-28 02:24:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-11-28 02:24:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 423. [2024-11-28 02:24:27,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.0639810426540284) internal successors, (449), 422 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:24:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 449 transitions. [2024-11-28 02:24:27,695 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 449 transitions. Word has length 207 [2024-11-28 02:24:27,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:24:27,695 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 449 transitions. [2024-11-28 02:24:27,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.854368932038835) internal successors, (397), 103 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:24:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 449 transitions. [2024-11-28 02:24:27,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-11-28 02:24:27,697 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:24:27,698 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:24:27,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-11-28 02:24:27,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-28 02:24:27,899 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:24:27,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:24:27,899 INFO L85 PathProgramCache]: Analyzing trace with hash 52981042, now seen corresponding path program 35 times [2024-11-28 02:24:27,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:24:27,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296262094] [2024-11-28 02:24:27,899 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:24:27,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:24:27,987 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2024-11-28 02:24:27,987 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:24:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1959 backedges. 62 proven. 1891 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:24:31,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:24:31,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296262094] [2024-11-28 02:24:31,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296262094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:24:31,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232741814] [2024-11-28 02:24:31,511 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:24:31,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:24:31,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:24:31,516 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:24:31,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-28 02:24:32,566 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2024-11-28 02:24:32,566 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:24:32,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 228 conjuncts are in the unsatisfiable core [2024-11-28 02:24:32,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:24:33,978 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 02:24:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1959 backedges. 62 proven. 1891 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:24:34,394 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:24:34,619 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 02:24:34,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 02:24:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1959 backedges. 62 proven. 1891 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:24:34,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232741814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:24:34,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:24:34,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 52, 52] total 86 [2024-11-28 02:24:34,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619611231] [2024-11-28 02:24:34,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:24:34,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-28 02:24:34,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:24:34,920 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-28 02:24:34,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=7067, Unknown=0, NotChecked=0, Total=7310 [2024-11-28 02:24:34,921 INFO L87 Difference]: Start difference. First operand 423 states and 449 transitions. Second operand has 86 states, 86 states have (on average 3.7674418604651163) internal successors, (324), 86 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:24:41,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:24:41,967 INFO L93 Difference]: Finished difference Result 763 states and 810 transitions. [2024-11-28 02:24:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-28 02:24:41,968 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.7674418604651163) internal successors, (324), 86 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2024-11-28 02:24:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:24:41,969 INFO L225 Difference]: With dead ends: 763 [2024-11-28 02:24:41,969 INFO L226 Difference]: Without dead ends: 437 [2024-11-28 02:24:41,970 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4071 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=533, Invalid=17289, Unknown=0, NotChecked=0, Total=17822 [2024-11-28 02:24:41,970 INFO L435 NwaCegarLoop]: 199 mSDtfsCounter, 287 mSDsluCounter, 9908 mSDsCounter, 0 mSdLazyCounter, 7888 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 10107 SdHoareTripleChecker+Invalid, 7910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 7888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:24:41,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 10107 Invalid, 7910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 7888 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-28 02:24:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2024-11-28 02:24:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 431. [2024-11-28 02:24:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 1.0627906976744186) internal successors, (457), 430 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:24:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 457 transitions. [2024-11-28 02:24:41,975 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 457 transitions. Word has length 216 [2024-11-28 02:24:41,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:24:41,976 INFO L471 AbstractCegarLoop]: Abstraction has 431 states and 457 transitions. [2024-11-28 02:24:41,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.7674418604651163) internal successors, (324), 86 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:24:41,976 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 457 transitions. [2024-11-28 02:24:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2024-11-28 02:24:41,977 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:24:41,978 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 21, 21, 21, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:24:41,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-28 02:24:42,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-28 02:24:42,182 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:24:42,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:24:42,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1443620523, now seen corresponding path program 36 times [2024-11-28 02:24:42,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:24:42,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131249345] [2024-11-28 02:24:42,183 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:24:42,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:24:42,315 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2024-11-28 02:24:42,315 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:24:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2044 backedges. 820 proven. 1218 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:24:45,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:24:45,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131249345] [2024-11-28 02:24:45,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131249345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:24:45,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123466665] [2024-11-28 02:24:45,658 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:24:45,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:24:45,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:24:45,660 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:24:45,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-28 02:24:48,618 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2024-11-28 02:24:48,618 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:24:48,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 168 conjuncts are in the unsatisfiable core [2024-11-28 02:24:48,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:24:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2044 backedges. 861 proven. 1177 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:24:50,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:24:53,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 02:24:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2044 backedges. 861 proven. 1177 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:24:54,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123466665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:24:54,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:24:54,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 50, 50] total 107 [2024-11-28 02:24:54,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712319834] [2024-11-28 02:24:54,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:24:54,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-11-28 02:24:54,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:24:54,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-11-28 02:24:54,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1734, Invalid=9822, Unknown=0, NotChecked=0, Total=11556 [2024-11-28 02:24:54,247 INFO L87 Difference]: Start difference. First operand 431 states and 457 transitions. Second operand has 108 states, 107 states have (on average 4.158878504672897) internal successors, (445), 108 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:24:58,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:24:58,877 INFO L93 Difference]: Finished difference Result 550 states and 577 transitions. [2024-11-28 02:24:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-28 02:24:58,877 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 4.158878504672897) internal successors, (445), 108 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2024-11-28 02:24:58,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:24:58,879 INFO L225 Difference]: With dead ends: 550 [2024-11-28 02:24:58,879 INFO L226 Difference]: Without dead ends: 550 [2024-11-28 02:24:58,880 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 363 SyntacticMatches, 23 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11312 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3847, Invalid=20023, Unknown=0, NotChecked=0, Total=23870 [2024-11-28 02:24:58,880 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 1111 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:24:58,880 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 989 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 02:24:58,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2024-11-28 02:24:58,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 441. [2024-11-28 02:24:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 1.0636363636363637) internal successors, (468), 440 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:24:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 468 transitions. [2024-11-28 02:24:58,887 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 468 transitions. Word has length 220 [2024-11-28 02:24:58,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:24:58,888 INFO L471 AbstractCegarLoop]: Abstraction has 441 states and 468 transitions. [2024-11-28 02:24:58,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 4.158878504672897) internal successors, (445), 108 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:24:58,888 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 468 transitions. [2024-11-28 02:24:58,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2024-11-28 02:24:58,890 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:24:58,890 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:24:58,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-28 02:24:59,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:24:59,091 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:24:59,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:24:59,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1483988211, now seen corresponding path program 37 times [2024-11-28 02:24:59,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:24:59,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126902759] [2024-11-28 02:24:59,091 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:24:59,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:24:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:25:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2151 backedges. 65 proven. 2080 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:25:02,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:25:02,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126902759] [2024-11-28 02:25:02,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126902759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:25:02,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959626761] [2024-11-28 02:25:02,862 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:25:02,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:02,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:25:02,864 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:25:02,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-28 02:25:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:25:03,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 240 conjuncts are in the unsatisfiable core [2024-11-28 02:25:03,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:25:04,967 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 02:25:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2151 backedges. 65 proven. 2080 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:25:05,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:25:05,769 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 02:25:05,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 02:25:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2151 backedges. 65 proven. 2080 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:25:06,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959626761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:25:06,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:25:06,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54, 54] total 86 [2024-11-28 02:25:06,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604582618] [2024-11-28 02:25:06,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:25:06,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-28 02:25:06,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:25:06,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-28 02:25:06,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=7072, Unknown=0, NotChecked=0, Total=7310 [2024-11-28 02:25:06,133 INFO L87 Difference]: Start difference. First operand 441 states and 468 transitions. Second operand has 86 states, 86 states have (on average 3.872093023255814) internal successors, (333), 86 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:25:14,588 INFO L93 Difference]: Finished difference Result 796 states and 845 transitions. [2024-11-28 02:25:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-28 02:25:14,589 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.872093023255814) internal successors, (333), 86 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2024-11-28 02:25:14,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:25:14,590 INFO L225 Difference]: With dead ends: 796 [2024-11-28 02:25:14,590 INFO L226 Difference]: Without dead ends: 455 [2024-11-28 02:25:14,592 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4039 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=542, Invalid=17818, Unknown=0, NotChecked=0, Total=18360 [2024-11-28 02:25:14,592 INFO L435 NwaCegarLoop]: 208 mSDtfsCounter, 476 mSDsluCounter, 11229 mSDsCounter, 0 mSdLazyCounter, 8433 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 11437 SdHoareTripleChecker+Invalid, 8477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 8433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:25:14,593 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 11437 Invalid, 8477 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [44 Valid, 8433 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-28 02:25:14,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2024-11-28 02:25:14,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 449. [2024-11-28 02:25:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.0625) internal successors, (476), 448 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 476 transitions. [2024-11-28 02:25:14,599 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 476 transitions. Word has length 225 [2024-11-28 02:25:14,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:25:14,599 INFO L471 AbstractCegarLoop]: Abstraction has 449 states and 476 transitions. [2024-11-28 02:25:14,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.872093023255814) internal successors, (333), 86 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 476 transitions. [2024-11-28 02:25:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-11-28 02:25:14,601 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:25:14,602 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 22, 22, 22, 22, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:25:14,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-28 02:25:14,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:14,802 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:25:14,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:25:14,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1038156902, now seen corresponding path program 38 times [2024-11-28 02:25:14,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:25:14,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496290572] [2024-11-28 02:25:14,803 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:25:14,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:25:14,838 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:25:14,838 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:25:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 861 proven. 1373 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:25:18,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:25:18,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496290572] [2024-11-28 02:25:18,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496290572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:25:18,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161748669] [2024-11-28 02:25:18,357 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:25:18,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:18,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:25:18,359 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:25:18,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-28 02:25:18,725 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:25:18,725 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:25:18,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 217 conjuncts are in the unsatisfiable core [2024-11-28 02:25:18,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:25:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 946 proven. 1288 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:25:21,326 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:25:24,628 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 02:25:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 946 proven. 1288 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:25:26,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161748669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:25:26,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:25:26,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 108 [2024-11-28 02:25:26,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419358979] [2024-11-28 02:25:26,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:25:26,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-11-28 02:25:26,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:25:26,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-11-28 02:25:26,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1314, Invalid=10458, Unknown=0, NotChecked=0, Total=11772 [2024-11-28 02:25:26,318 INFO L87 Difference]: Start difference. First operand 449 states and 476 transitions. Second operand has 109 states, 108 states have (on average 4.212962962962963) internal successors, (455), 109 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:25:34,616 INFO L93 Difference]: Finished difference Result 573 states and 601 transitions. [2024-11-28 02:25:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-28 02:25:34,617 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 108 states have (on average 4.212962962962963) internal successors, (455), 109 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2024-11-28 02:25:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:25:34,619 INFO L225 Difference]: With dead ends: 573 [2024-11-28 02:25:34,619 INFO L226 Difference]: Without dead ends: 573 [2024-11-28 02:25:34,620 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 378 SyntacticMatches, 24 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10058 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=2283, Invalid=22523, Unknown=0, NotChecked=0, Total=24806 [2024-11-28 02:25:34,620 INFO L435 NwaCegarLoop]: 193 mSDtfsCounter, 983 mSDsluCounter, 7330 mSDsCounter, 0 mSdLazyCounter, 6996 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 7523 SdHoareTripleChecker+Invalid, 6997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:25:34,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 7523 Invalid, 6997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6996 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-28 02:25:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2024-11-28 02:25:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 459. [2024-11-28 02:25:34,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.0633187772925765) internal successors, (487), 458 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 487 transitions. [2024-11-28 02:25:34,629 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 487 transitions. Word has length 229 [2024-11-28 02:25:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:25:34,629 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 487 transitions. [2024-11-28 02:25:34,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 108 states have (on average 4.212962962962963) internal successors, (455), 109 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 487 transitions. [2024-11-28 02:25:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2024-11-28 02:25:34,631 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:25:34,632 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:25:34,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-11-28 02:25:34,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-11-28 02:25:34,832 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:25:34,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:25:34,833 INFO L85 PathProgramCache]: Analyzing trace with hash 956532068, now seen corresponding path program 39 times [2024-11-28 02:25:34,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:25:34,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781077849] [2024-11-28 02:25:34,833 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:25:34,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:25:34,971 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-28 02:25:34,972 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:25:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 861 proven. 1485 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:25:41,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:25:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781077849] [2024-11-28 02:25:41,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781077849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:25:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171805977] [2024-11-28 02:25:41,151 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:25:41,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:41,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:25:41,154 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:25:41,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-28 02:25:43,586 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-28 02:25:43,586 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:25:43,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 254 conjuncts are in the unsatisfiable core [2024-11-28 02:25:43,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:25:46,441 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 02:25:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 68 proven. 2278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:25:50,255 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:25:54,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 02:25:54,176 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 02:25:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 68 proven. 2278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:25:57,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171805977] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:25:57,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:25:57,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 57, 56] total 170 [2024-11-28 02:25:57,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742176674] [2024-11-28 02:25:57,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:25:57,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2024-11-28 02:25:57,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:25:57,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2024-11-28 02:25:57,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1044, Invalid=27686, Unknown=0, NotChecked=0, Total=28730 [2024-11-28 02:25:58,000 INFO L87 Difference]: Start difference. First operand 459 states and 487 transitions. Second operand has 170 states, 170 states have (on average 3.9823529411764707) internal successors, (677), 170 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:34,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:34,746 INFO L93 Difference]: Finished difference Result 949 states and 1001 transitions. [2024-11-28 02:26:34,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2024-11-28 02:26:34,746 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 3.9823529411764707) internal successors, (677), 170 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2024-11-28 02:26:34,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:34,748 INFO L225 Difference]: With dead ends: 949 [2024-11-28 02:26:34,748 INFO L226 Difference]: Without dead ends: 593 [2024-11-28 02:26:34,751 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27584 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=5884, Invalid=95558, Unknown=0, NotChecked=0, Total=101442 [2024-11-28 02:26:34,751 INFO L435 NwaCegarLoop]: 191 mSDtfsCounter, 2116 mSDsluCounter, 13741 mSDsCounter, 0 mSdLazyCounter, 14347 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2116 SdHoareTripleChecker+Valid, 13932 SdHoareTripleChecker+Invalid, 14502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 14347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:34,752 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2116 Valid, 13932 Invalid, 14502 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [155 Valid, 14347 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2024-11-28 02:26:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2024-11-28 02:26:34,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 477. [2024-11-28 02:26:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.0630252100840336) internal successors, (506), 476 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:34,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 506 transitions. [2024-11-28 02:26:34,759 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 506 transitions. Word has length 234 [2024-11-28 02:26:34,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:34,759 INFO L471 AbstractCegarLoop]: Abstraction has 477 states and 506 transitions. [2024-11-28 02:26:34,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 3.9823529411764707) internal successors, (677), 170 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:34,760 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 506 transitions. [2024-11-28 02:26:34,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2024-11-28 02:26:34,762 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:34,762 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:34,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-11-28 02:26:34,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-11-28 02:26:34,963 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:26:34,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:34,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2009040831, now seen corresponding path program 40 times [2024-11-28 02:26:34,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:34,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348917434] [2024-11-28 02:26:34,963 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:26:34,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:35,022 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:26:35,022 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2562 backedges. 71 proven. 2485 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:26:39,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:39,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348917434] [2024-11-28 02:26:39,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348917434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:39,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251467816] [2024-11-28 02:26:39,066 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:26:39,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:39,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:39,068 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:39,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-28 02:26:39,658 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:26:39,658 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:39,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 258 conjuncts are in the unsatisfiable core [2024-11-28 02:26:39,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:40,072 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 02:26:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2562 backedges. 71 proven. 2485 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:26:40,366 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:40,655 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 02:26:40,657 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 02:26:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2562 backedges. 71 proven. 2485 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:26:40,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251467816] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:40,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:40,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 62 [2024-11-28 02:26:40,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068560491] [2024-11-28 02:26:40,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:40,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-28 02:26:40,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:40,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-28 02:26:40,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3645, Unknown=0, NotChecked=0, Total=3782 [2024-11-28 02:26:40,940 INFO L87 Difference]: Start difference. First operand 477 states and 506 transitions. Second operand has 62 states, 62 states have (on average 4.016129032258065) internal successors, (249), 62 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:48,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:48,555 INFO L93 Difference]: Finished difference Result 862 states and 915 transitions. [2024-11-28 02:26:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-11-28 02:26:48,556 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 4.016129032258065) internal successors, (249), 62 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2024-11-28 02:26:48,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:48,557 INFO L225 Difference]: With dead ends: 862 [2024-11-28 02:26:48,557 INFO L226 Difference]: Without dead ends: 491 [2024-11-28 02:26:48,558 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=337, Invalid=12095, Unknown=0, NotChecked=0, Total=12432 [2024-11-28 02:26:48,558 INFO L435 NwaCegarLoop]: 226 mSDtfsCounter, 312 mSDsluCounter, 11758 mSDsCounter, 0 mSdLazyCounter, 8480 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 11984 SdHoareTripleChecker+Invalid, 8504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 8480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:48,558 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 11984 Invalid, 8504 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 8480 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-28 02:26:48,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2024-11-28 02:26:48,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 485. [2024-11-28 02:26:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.06198347107438) internal successors, (514), 484 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:48,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 514 transitions. [2024-11-28 02:26:48,565 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 514 transitions. Word has length 243 [2024-11-28 02:26:48,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:48,566 INFO L471 AbstractCegarLoop]: Abstraction has 485 states and 514 transitions. [2024-11-28 02:26:48,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 4.016129032258065) internal successors, (249), 62 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:48,566 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 514 transitions. [2024-11-28 02:26:48,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2024-11-28 02:26:48,568 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:48,568 INFO L218 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 24, 24, 24, 24, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:48,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-28 02:26:48,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-11-28 02:26:48,768 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:26:48,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:48,770 INFO L85 PathProgramCache]: Analyzing trace with hash 516283176, now seen corresponding path program 41 times [2024-11-28 02:26:48,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:48,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430492191] [2024-11-28 02:26:48,770 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:26:48,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:48,946 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2024-11-28 02:26:48,946 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2659 backedges. 1176 proven. 1477 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:26:53,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:53,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430492191] [2024-11-28 02:26:53,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430492191] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:53,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153834451] [2024-11-28 02:26:53,021 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:26:53,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:53,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:53,023 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:53,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-28 02:26:56,194 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2024-11-28 02:26:56,194 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:56,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 240 conjuncts are in the unsatisfiable core [2024-11-28 02:26:56,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:56,217 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 02:27:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2659 backedges. 1176 proven. 1477 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:27:00,224 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2659 backedges. 1225 proven. 1428 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:27:09,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153834451] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:09,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:27:09,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 55, 55] total 142 [2024-11-28 02:27:09,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611257211] [2024-11-28 02:27:09,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:09,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2024-11-28 02:27:09,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:27:09,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2024-11-28 02:27:09,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2359, Invalid=17947, Unknown=0, NotChecked=0, Total=20306 [2024-11-28 02:27:09,862 INFO L87 Difference]: Start difference. First operand 485 states and 514 transitions. Second operand has 143 states, 142 states have (on average 4.288732394366197) internal successors, (609), 143 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:20,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:20,873 INFO L93 Difference]: Finished difference Result 619 states and 649 transitions. [2024-11-28 02:27:20,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-11-28 02:27:20,874 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 142 states have (on average 4.288732394366197) internal successors, (609), 143 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2024-11-28 02:27:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:20,875 INFO L225 Difference]: With dead ends: 619 [2024-11-28 02:27:20,875 INFO L226 Difference]: Without dead ends: 619 [2024-11-28 02:27:20,876 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9824 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=3421, Invalid=34021, Unknown=0, NotChecked=0, Total=37442 [2024-11-28 02:27:20,877 INFO L435 NwaCegarLoop]: 209 mSDtfsCounter, 1147 mSDsluCounter, 7916 mSDsCounter, 0 mSdLazyCounter, 7538 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 8125 SdHoareTripleChecker+Invalid, 7538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:20,877 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1147 Valid, 8125 Invalid, 7538 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7538 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2024-11-28 02:27:20,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2024-11-28 02:27:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 495. [2024-11-28 02:27:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.062753036437247) internal successors, (525), 494 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 525 transitions. [2024-11-28 02:27:20,885 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 525 transitions. Word has length 247 [2024-11-28 02:27:20,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:20,885 INFO L471 AbstractCegarLoop]: Abstraction has 495 states and 525 transitions. [2024-11-28 02:27:20,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 142 states have (on average 4.288732394366197) internal successors, (609), 143 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 525 transitions. [2024-11-28 02:27:20,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2024-11-28 02:27:20,887 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:20,887 INFO L218 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:27:20,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-11-28 02:27:21,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:21,088 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:27:21,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:21,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1327509142, now seen corresponding path program 42 times [2024-11-28 02:27:21,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:27:21,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061563388] [2024-11-28 02:27:21,088 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:27:21,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:27:21,250 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2024-11-28 02:27:21,250 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2781 backedges. 74 proven. 2701 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:27:28,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:27:28,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061563388] [2024-11-28 02:27:28,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061563388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:27:28,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661589692] [2024-11-28 02:27:28,054 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:27:28,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:28,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:28,056 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:28,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-28 02:27:33,535 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2024-11-28 02:27:33,535 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:33,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 274 conjuncts are in the unsatisfiable core [2024-11-28 02:27:33,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:36,297 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 02:27:37,074 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 02:27:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2781 backedges. 74 proven. 2701 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:27:37,078 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:37,376 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 02:27:37,378 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 02:27:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2781 backedges. 74 proven. 2701 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:27:37,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661589692] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:37,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:27:37,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 60, 60] total 103 [2024-11-28 02:27:37,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56907594] [2024-11-28 02:27:37,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:37,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-11-28 02:27:37,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:27:37,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-11-28 02:27:37,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=10226, Unknown=0, NotChecked=0, Total=10506 [2024-11-28 02:27:37,824 INFO L87 Difference]: Start difference. First operand 495 states and 525 transitions. Second operand has 103 states, 103 states have (on average 3.7281553398058254) internal successors, (384), 103 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:53,690 INFO L93 Difference]: Finished difference Result 895 states and 950 transitions. [2024-11-28 02:27:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-28 02:27:53,691 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.7281553398058254) internal successors, (384), 103 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2024-11-28 02:27:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:53,692 INFO L225 Difference]: With dead ends: 895 [2024-11-28 02:27:53,692 INFO L226 Difference]: Without dead ends: 509 [2024-11-28 02:27:53,694 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6401 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=707, Invalid=28363, Unknown=0, NotChecked=0, Total=29070 [2024-11-28 02:27:53,694 INFO L435 NwaCegarLoop]: 234 mSDtfsCounter, 485 mSDsluCounter, 16733 mSDsCounter, 0 mSdLazyCounter, 13157 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 16967 SdHoareTripleChecker+Invalid, 13184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 13157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:53,695 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 16967 Invalid, 13184 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 13157 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2024-11-28 02:27:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2024-11-28 02:27:53,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 503. [2024-11-28 02:27:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.0617529880478087) internal successors, (533), 502 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 533 transitions. [2024-11-28 02:27:53,700 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 533 transitions. Word has length 252 [2024-11-28 02:27:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:53,700 INFO L471 AbstractCegarLoop]: Abstraction has 503 states and 533 transitions. [2024-11-28 02:27:53,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.7281553398058254) internal successors, (384), 103 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 533 transitions. [2024-11-28 02:27:53,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2024-11-28 02:27:53,702 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:53,702 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 25, 25, 25, 25, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:27:53,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-28 02:27:53,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:53,903 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:27:53,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:53,903 INFO L85 PathProgramCache]: Analyzing trace with hash -909238385, now seen corresponding path program 43 times [2024-11-28 02:27:53,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:27:53,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714957248] [2024-11-28 02:27:53,903 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:27:53,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:27:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 1176 proven. 1700 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:27:59,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:27:59,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714957248] [2024-11-28 02:27:59,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714957248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:27:59,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330311482] [2024-11-28 02:27:59,081 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:27:59,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:59,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:59,083 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:59,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-28 02:27:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:59,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 243 conjuncts are in the unsatisfiable core [2024-11-28 02:27:59,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:28:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 1275 proven. 1601 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:28:02,275 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:28:06,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 02:28:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 1275 proven. 1601 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:28:08,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330311482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:28:08,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:28:08,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 57, 57] total 119 [2024-11-28 02:28:08,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476985251] [2024-11-28 02:28:08,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:28:08,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2024-11-28 02:28:08,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:28:08,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2024-11-28 02:28:08,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1634, Invalid=12646, Unknown=0, NotChecked=0, Total=14280 [2024-11-28 02:28:08,059 INFO L87 Difference]: Start difference. First operand 503 states and 533 transitions. Second operand has 120 states, 119 states have (on average 4.319327731092437) internal successors, (514), 120 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:28:17,889 INFO L93 Difference]: Finished difference Result 642 states and 673 transitions. [2024-11-28 02:28:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-28 02:28:17,890 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 4.319327731092437) internal successors, (514), 120 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 256 [2024-11-28 02:28:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:28:17,891 INFO L225 Difference]: With dead ends: 642 [2024-11-28 02:28:17,891 INFO L226 Difference]: Without dead ends: 642 [2024-11-28 02:28:17,892 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 425 SyntacticMatches, 26 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12152 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=2737, Invalid=27019, Unknown=0, NotChecked=0, Total=29756 [2024-11-28 02:28:17,893 INFO L435 NwaCegarLoop]: 216 mSDtfsCounter, 1203 mSDsluCounter, 8578 mSDsCounter, 0 mSdLazyCounter, 8302 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 8794 SdHoareTripleChecker+Invalid, 8302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:28:17,893 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1203 Valid, 8794 Invalid, 8302 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 8302 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-28 02:28:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2024-11-28 02:28:17,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 513. [2024-11-28 02:28:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.0625) internal successors, (544), 512 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 544 transitions. [2024-11-28 02:28:17,899 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 544 transitions. Word has length 256 [2024-11-28 02:28:17,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:28:17,900 INFO L471 AbstractCegarLoop]: Abstraction has 513 states and 544 transitions. [2024-11-28 02:28:17,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 119 states have (on average 4.319327731092437) internal successors, (514), 120 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:17,900 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 544 transitions. [2024-11-28 02:28:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2024-11-28 02:28:17,902 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:28:17,902 INFO L218 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:28:17,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-28 02:28:18,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eaf105-714a-4314-a1c6-bef2b8f99585/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:28:18,103 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 02:28:18,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:28:18,103 INFO L85 PathProgramCache]: Analyzing trace with hash 40211087, now seen corresponding path program 44 times [2024-11-28 02:28:18,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:28:18,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320433370] [2024-11-28 02:28:18,104 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:28:18,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:28:18,204 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:28:18,204 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat