./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-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_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/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_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/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_6efd62b1-d139-4cf1-8988-4890b6adabb2/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 991fb09b573d5827d0db553f1ea89a581f5a664ba8b68d6f14a043df738f2f6d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:08:19,260 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:08:19,362 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 02:08:19,368 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:08:19,369 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:08:19,403 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:08:19,405 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:08:19,405 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:08:19,406 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:08:19,406 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:08:19,407 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:08:19,407 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:08:19,408 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:08:19,408 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:08:19,408 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:08:19,409 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:08:19,409 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:08:19,409 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:08:19,409 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:08:19,410 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:08:19,410 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 02:08:19,410 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 02:08:19,410 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 02:08:19,410 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:08:19,410 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:08:19,410 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:08:19,410 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:08:19,410 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:08:19,411 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:08:19,411 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:08:19,411 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:08:19,411 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:08:19,411 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:08:19,411 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:08:19,411 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:08:19,411 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:08:19,411 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:08:19,411 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:08:19,411 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:08:19,412 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:08:19,412 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:08:19,412 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:08:19,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:08:19,412 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:08:19,412 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:08:19,412 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:08:19,412 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:08:19,412 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_6efd62b1-d139-4cf1-8988-4890b6adabb2/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 -> 991fb09b573d5827d0db553f1ea89a581f5a664ba8b68d6f14a043df738f2f6d [2024-11-28 02:08:19,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:08:19,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:08:19,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:08:19,731 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:08:19,732 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:08:19,733 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2024-11-28 02:08:22,763 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/data/3a93d978d/9facfe3e822f4bfda7219d79de090ba2/FLAG6f82cf627 [2024-11-28 02:08:23,172 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:08:23,173 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2024-11-28 02:08:23,198 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/data/3a93d978d/9facfe3e822f4bfda7219d79de090ba2/FLAG6f82cf627 [2024-11-28 02:08:23,357 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/data/3a93d978d/9facfe3e822f4bfda7219d79de090ba2 [2024-11-28 02:08:23,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:08:23,361 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:08:23,362 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:08:23,362 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:08:23,367 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:08:23,368 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,369 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e850858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23, skipping insertion in model container [2024-11-28 02:08:23,369 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,397 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:08:23,750 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 02:08:23,752 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 02:08:23,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:08:23,775 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:08:23,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:08:23,850 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:08:23,850 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23 WrapperNode [2024-11-28 02:08:23,850 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:08:23,851 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:08:23,852 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:08:23,852 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:08:23,858 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,869 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,895 INFO L138 Inliner]: procedures = 119, calls = 23, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 160 [2024-11-28 02:08:23,895 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:08:23,896 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:08:23,896 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:08:23,896 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:08:23,907 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,907 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,910 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,935 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [6, 6]. 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 02:08:23,935 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,936 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,945 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,947 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,953 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,956 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:08:23,957 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:08:23,957 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:08:23,957 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:08:23,958 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23" (1/1) ... [2024-11-28 02:08:23,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:08:23,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:23,989 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:08:23,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:08:24,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 02:08:24,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 02:08:24,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 02:08:24,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 02:08:24,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 02:08:24,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 02:08:24,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:08:24,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:08:24,151 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:08:24,153 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:08:24,513 INFO L? ?]: Removed 97 outVars from TransFormulas that were not future-live. [2024-11-28 02:08:24,513 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:08:24,527 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:08:24,527 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 02:08:24,528 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:08:24 BoogieIcfgContainer [2024-11-28 02:08:24,528 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:08:24,533 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:08:24,533 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:08:24,538 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:08:24,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:08:23" (1/3) ... [2024-11-28 02:08:24,539 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27934337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:08:24, skipping insertion in model container [2024-11-28 02:08:24,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:08:23" (2/3) ... [2024-11-28 02:08:24,540 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27934337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:08:24, skipping insertion in model container [2024-11-28 02:08:24,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:08:24" (3/3) ... [2024-11-28 02:08:24,542 INFO L128 eAbstractionObserver]: Analyzing ICFG openbsd_cstrstr-alloca-2.i [2024-11-28 02:08:24,563 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:08:24,565 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrstr-alloca-2.i that has 1 procedures, 79 locations, 1 initial locations, 6 loop locations, and 25 error locations. [2024-11-28 02:08:24,617 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:08:24,638 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;@726b4216, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:08:24,638 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-28 02:08:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 53 states have (on average 1.830188679245283) internal successors, (97), 78 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 02:08:24,651 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:24,651 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:24,652 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:24,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:24,658 INFO L85 PathProgramCache]: Analyzing trace with hash 121325233, now seen corresponding path program 1 times [2024-11-28 02:08:24,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:24,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072889299] [2024-11-28 02:08:24,668 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:24,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:25,013 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 02:08:25,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:25,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072889299] [2024-11-28 02:08:25,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072889299] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:25,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:25,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:08:25,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039287671] [2024-11-28 02:08:25,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:25,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:08:25,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:25,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:08:25,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:08:25,048 INFO L87 Difference]: Start difference. First operand has 79 states, 53 states have (on average 1.830188679245283) internal successors, (97), 78 states have internal predecessors, (97), 0 states have call successors, (0), 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 02:08:25,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:25,158 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2024-11-28 02:08:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:08:25,161 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 02:08:25,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:25,167 INFO L225 Difference]: With dead ends: 77 [2024-11-28 02:08:25,167 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 02:08:25,169 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 02:08:25,172 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 16 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:25,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 126 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:25,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 02:08:25,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-28 02:08:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 74 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 02:08:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2024-11-28 02:08:25,217 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 8 [2024-11-28 02:08:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:25,218 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2024-11-28 02:08:25,218 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 02:08:25,218 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2024-11-28 02:08:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 02:08:25,219 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:25,219 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:25,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:08:25,220 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:25,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:25,223 INFO L85 PathProgramCache]: Analyzing trace with hash 121325234, now seen corresponding path program 1 times [2024-11-28 02:08:25,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:25,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941715370] [2024-11-28 02:08:25,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:25,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:25,647 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 02:08:25,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:25,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941715370] [2024-11-28 02:08:25,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941715370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:25,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:25,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:08:25,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836398529] [2024-11-28 02:08:25,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:25,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:08:25,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:25,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:08:25,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:08:25,652 INFO L87 Difference]: Start difference. First operand 75 states and 87 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 02:08:25,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:25,881 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2024-11-28 02:08:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:08:25,882 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 02:08:25,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:25,883 INFO L225 Difference]: With dead ends: 95 [2024-11-28 02:08:25,883 INFO L226 Difference]: Without dead ends: 95 [2024-11-28 02:08:25,884 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 02:08:25,884 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 24 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:25,885 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 296 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:08:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-28 02:08:25,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2024-11-28 02:08:25,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.631578947368421) internal successors, (93), 79 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:25,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2024-11-28 02:08:25,897 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 8 [2024-11-28 02:08:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:25,897 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2024-11-28 02:08:25,899 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 02:08:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2024-11-28 02:08:25,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 02:08:25,899 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:25,899 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:25,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:08:25,900 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:25,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash 178583536, now seen corresponding path program 1 times [2024-11-28 02:08:25,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:25,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094788111] [2024-11-28 02:08:25,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:25,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:26,233 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 02:08:26,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:26,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094788111] [2024-11-28 02:08:26,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094788111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:26,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:26,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:08:26,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587329635] [2024-11-28 02:08:26,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:26,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:08:26,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:26,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:08:26,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:08:26,235 INFO L87 Difference]: Start difference. First operand 80 states and 93 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 02:08:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:26,341 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2024-11-28 02:08:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:08:26,342 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 02:08:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:26,343 INFO L225 Difference]: With dead ends: 84 [2024-11-28 02:08:26,343 INFO L226 Difference]: Without dead ends: 84 [2024-11-28 02:08:26,343 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 02:08:26,344 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 41 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:26,345 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 196 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-28 02:08:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2024-11-28 02:08:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2024-11-28 02:08:26,358 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 8 [2024-11-28 02:08:26,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:26,358 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2024-11-28 02:08:26,358 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 02:08:26,358 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2024-11-28 02:08:26,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 02:08:26,359 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:26,359 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:26,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:08:26,361 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:26,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:26,363 INFO L85 PathProgramCache]: Analyzing trace with hash -706351253, now seen corresponding path program 1 times [2024-11-28 02:08:26,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:26,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174595129] [2024-11-28 02:08:26,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:26,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:26,470 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 02:08:26,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174595129] [2024-11-28 02:08:26,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174595129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782026928] [2024-11-28 02:08:26,471 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:26,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:26,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:26,474 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:26,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:08:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:26,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:08:26,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:26,661 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 02:08:26,662 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:08:26,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782026928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:26,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:08:26,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-28 02:08:26,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471374889] [2024-11-28 02:08:26,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:26,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:08:26,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:26,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:08:26,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:08:26,664 INFO L87 Difference]: Start difference. First operand 78 states and 90 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 02:08:26,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:26,719 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2024-11-28 02:08:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:08:26,719 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 02:08:26,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:26,720 INFO L225 Difference]: With dead ends: 94 [2024-11-28 02:08:26,720 INFO L226 Difference]: Without dead ends: 94 [2024-11-28 02:08:26,720 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:08:26,721 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 11 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 244 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 02:08:26,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 244 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:08:26,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-28 02:08:26,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2024-11-28 02:08:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.5806451612903225) internal successors, (98), 84 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:26,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2024-11-28 02:08:26,728 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 12 [2024-11-28 02:08:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:26,728 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2024-11-28 02:08:26,728 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 02:08:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2024-11-28 02:08:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 02:08:26,729 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:26,729 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:26,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 02:08:26,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:26,933 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:26,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:26,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1099378263, now seen corresponding path program 1 times [2024-11-28 02:08:26,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:26,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455750589] [2024-11-28 02:08:26,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:26,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:27,411 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 02:08:27,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:27,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455750589] [2024-11-28 02:08:27,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455750589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:27,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786995344] [2024-11-28 02:08:27,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:27,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:27,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:27,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:27,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:08:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:27,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 02:08:27,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:27,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:08:27,587 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 02:08:27,602 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 02:08:27,858 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 02:08:27,859 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:28,132 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:08:28,160 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 02:08:28,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786995344] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:28,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:28,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-28 02:08:28,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586246639] [2024-11-28 02:08:28,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:28,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:08:28,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:28,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:08:28,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:08:28,164 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 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 02:08:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:28,556 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2024-11-28 02:08:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:08:28,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 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 12 [2024-11-28 02:08:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:28,559 INFO L225 Difference]: With dead ends: 85 [2024-11-28 02:08:28,561 INFO L226 Difference]: Without dead ends: 85 [2024-11-28 02:08:28,561 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-11-28 02:08:28,562 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 32 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:28,562 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 525 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:08:28,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-28 02:08:28,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2024-11-28 02:08:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 81 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 02:08:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2024-11-28 02:08:28,571 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 12 [2024-11-28 02:08:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:28,571 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2024-11-28 02:08:28,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 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 02:08:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2024-11-28 02:08:28,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 02:08:28,575 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:28,575 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:28,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 02:08:28,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:28,776 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:28,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:28,777 INFO L85 PathProgramCache]: Analyzing trace with hash -196624046, now seen corresponding path program 1 times [2024-11-28 02:08:28,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:28,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838585018] [2024-11-28 02:08:28,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:28,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:28,855 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 02:08:28,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:28,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838585018] [2024-11-28 02:08:28,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838585018] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:28,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:28,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:08:28,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899751632] [2024-11-28 02:08:28,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:28,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:08:28,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:28,859 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:08:28,859 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:08:28,859 INFO L87 Difference]: Start difference. First operand 82 states and 95 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 02:08:28,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:28,911 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2024-11-28 02:08:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:08:28,912 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 02:08:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:28,913 INFO L225 Difference]: With dead ends: 80 [2024-11-28 02:08:28,913 INFO L226 Difference]: Without dead ends: 80 [2024-11-28 02:08:28,913 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 02:08:28,914 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:28,914 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 122 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:08:28,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-28 02:08:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-28 02:08:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.55) internal successors, (93), 79 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2024-11-28 02:08:28,928 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 14 [2024-11-28 02:08:28,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:28,928 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2024-11-28 02:08:28,928 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 02:08:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2024-11-28 02:08:28,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 02:08:28,929 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:28,929 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:28,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 02:08:28,929 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:28,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:28,930 INFO L85 PathProgramCache]: Analyzing trace with hash -196624045, now seen corresponding path program 1 times [2024-11-28 02:08:28,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:28,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183974777] [2024-11-28 02:08:28,930 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:28,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:29,146 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 02:08:29,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:29,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183974777] [2024-11-28 02:08:29,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183974777] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:29,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:29,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:08:29,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482540493] [2024-11-28 02:08:29,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:29,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:08:29,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:29,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:08:29,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:08:29,149 INFO L87 Difference]: Start difference. First operand 80 states and 93 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 02:08:29,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:29,311 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2024-11-28 02:08:29,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:08:29,312 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 02:08:29,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:29,313 INFO L225 Difference]: With dead ends: 106 [2024-11-28 02:08:29,313 INFO L226 Difference]: Without dead ends: 106 [2024-11-28 02:08:29,314 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:08:29,314 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 36 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:29,315 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 264 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-28 02:08:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2024-11-28 02:08:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 95 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2024-11-28 02:08:29,324 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 14 [2024-11-28 02:08:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:29,324 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2024-11-28 02:08:29,324 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 02:08:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2024-11-28 02:08:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 02:08:29,325 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:29,325 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:29,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 02:08:29,325 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:29,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:29,330 INFO L85 PathProgramCache]: Analyzing trace with hash 504440533, now seen corresponding path program 1 times [2024-11-28 02:08:29,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:29,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152049862] [2024-11-28 02:08:29,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:29,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:29,570 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 02:08:29,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:29,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152049862] [2024-11-28 02:08:29,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152049862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:29,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:29,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:08:29,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598210464] [2024-11-28 02:08:29,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:29,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:08:29,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:29,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:08:29,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:08:29,573 INFO L87 Difference]: Start difference. First operand 96 states and 110 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 02:08:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:29,674 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2024-11-28 02:08:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:08:29,675 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 02:08:29,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:29,675 INFO L225 Difference]: With dead ends: 99 [2024-11-28 02:08:29,678 INFO L226 Difference]: Without dead ends: 99 [2024-11-28 02:08:29,678 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:08:29,679 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 33 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:29,679 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 236 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:29,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-28 02:08:29,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2024-11-28 02:08:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 63 states have (on average 1.507936507936508) internal successors, (95), 81 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 02:08:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2024-11-28 02:08:29,687 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 14 [2024-11-28 02:08:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:29,688 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2024-11-28 02:08:29,688 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 02:08:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2024-11-28 02:08:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:08:29,688 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:29,688 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:29,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 02:08:29,689 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:29,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:29,689 INFO L85 PathProgramCache]: Analyzing trace with hash 487237132, now seen corresponding path program 1 times [2024-11-28 02:08:29,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:29,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859873307] [2024-11-28 02:08:29,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:29,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:29,766 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 02:08:29,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:29,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859873307] [2024-11-28 02:08:29,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859873307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:29,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151575162] [2024-11-28 02:08:29,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:29,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:29,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:29,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:29,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:08:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:29,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:08:29,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:29,905 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 02:08:29,906 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:08:29,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151575162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:29,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:08:29,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-28 02:08:29,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474528294] [2024-11-28 02:08:29,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:29,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:08:29,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:29,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:08:29,907 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:08:29,908 INFO L87 Difference]: Start difference. First operand 82 states and 95 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 02:08:29,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:29,939 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2024-11-28 02:08:29,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:08:29,940 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 02:08:29,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:29,941 INFO L225 Difference]: With dead ends: 104 [2024-11-28 02:08:29,941 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 02:08:29,941 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 02:08:29,942 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 4 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:29,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 225 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:08:29,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 02:08:29,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2024-11-28 02:08:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.4074074074074074) internal successors, (114), 99 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:29,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2024-11-28 02:08:29,950 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 18 [2024-11-28 02:08:29,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:29,950 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2024-11-28 02:08:29,950 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 02:08:29,951 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2024-11-28 02:08:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:08:29,951 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:29,951 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 02:08:29,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 02:08:30,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:30,152 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:30,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:30,152 INFO L85 PathProgramCache]: Analyzing trace with hash 487239310, now seen corresponding path program 1 times [2024-11-28 02:08:30,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:30,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141086936] [2024-11-28 02:08:30,153 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:30,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:08:30,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:30,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141086936] [2024-11-28 02:08:30,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141086936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:30,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546228907] [2024-11-28 02:08:30,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:30,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:30,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:30,337 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:30,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:08:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:30,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:08:30,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:30,556 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 02:08:30,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:30,634 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 02:08:30,699 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 02:08:30,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546228907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:30,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:30,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-28 02:08:30,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750427358] [2024-11-28 02:08:30,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:30,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:08:30,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:30,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:08:30,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:08:30,701 INFO L87 Difference]: Start difference. First operand 100 states and 114 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 02:08:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:30,848 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2024-11-28 02:08:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:08:30,848 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 02:08:30,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:30,849 INFO L225 Difference]: With dead ends: 117 [2024-11-28 02:08:30,849 INFO L226 Difference]: Without dead ends: 117 [2024-11-28 02:08:30,849 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:08:30,850 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 10 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:30,850 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 339 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-28 02:08:30,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2024-11-28 02:08:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 97 states have (on average 1.3608247422680413) internal successors, (132), 115 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2024-11-28 02:08:30,859 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 18 [2024-11-28 02:08:30,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:30,859 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2024-11-28 02:08:30,860 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 02:08:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2024-11-28 02:08:30,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:08:30,860 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:30,860 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:30,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 02:08:31,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:31,061 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:31,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:31,063 INFO L85 PathProgramCache]: Analyzing trace with hash -792626546, now seen corresponding path program 1 times [2024-11-28 02:08:31,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:31,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175351734] [2024-11-28 02:08:31,063 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:31,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:31,416 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 02:08:31,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:31,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175351734] [2024-11-28 02:08:31,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175351734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:31,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672395330] [2024-11-28 02:08:31,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:31,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:31,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:31,419 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:31,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:08:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:31,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:08:31,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:31,513 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 02:08:31,521 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 8 treesize of output 1 [2024-11-28 02:08:31,818 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 02:08:31,819 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:32,248 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 02:08:32,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672395330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:32,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:32,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-28 02:08:32,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045081966] [2024-11-28 02:08:32,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:32,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:08:32,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:32,249 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:08:32,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:08:32,250 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 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 02:08:32,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:32,576 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2024-11-28 02:08:32,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:08:32,577 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 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 02:08:32,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:32,578 INFO L225 Difference]: With dead ends: 117 [2024-11-28 02:08:32,579 INFO L226 Difference]: Without dead ends: 117 [2024-11-28 02:08:32,580 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2024-11-28 02:08:32,581 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 26 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:32,582 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 434 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:08:32,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-28 02:08:32,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 111. [2024-11-28 02:08:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 93 states have (on average 1.3548387096774193) internal successors, (126), 110 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 02:08:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2024-11-28 02:08:32,589 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 18 [2024-11-28 02:08:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:32,589 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2024-11-28 02:08:32,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 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 02:08:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2024-11-28 02:08:32,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:08:32,592 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:32,592 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 02:08:32,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 02:08:32,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:32,797 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:32,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:32,797 INFO L85 PathProgramCache]: Analyzing trace with hash -533829044, now seen corresponding path program 1 times [2024-11-28 02:08:32,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:32,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765976627] [2024-11-28 02:08:32,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:32,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:32,915 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 02:08:32,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:32,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765976627] [2024-11-28 02:08:32,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765976627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:32,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:32,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:08:32,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301724953] [2024-11-28 02:08:32,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:32,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:08:32,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:32,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:08:32,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:08:32,918 INFO L87 Difference]: Start difference. First operand 111 states and 126 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 02:08:32,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:32,988 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2024-11-28 02:08:32,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:08:32,989 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 02:08:32,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:32,990 INFO L225 Difference]: With dead ends: 110 [2024-11-28 02:08:32,990 INFO L226 Difference]: Without dead ends: 110 [2024-11-28 02:08:32,990 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:08:32,991 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 3 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 237 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 02:08:32,991 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 237 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-28 02:08:32,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2024-11-28 02:08:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 79 states have (on average 1.3924050632911393) internal successors, (110), 95 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2024-11-28 02:08:32,995 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 18 [2024-11-28 02:08:32,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:32,995 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2024-11-28 02:08:32,995 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 02:08:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2024-11-28 02:08:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-28 02:08:32,996 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:32,996 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] [2024-11-28 02:08:32,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 02:08:32,996 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:32,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:32,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1643181139, now seen corresponding path program 1 times [2024-11-28 02:08:32,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:32,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695661487] [2024-11-28 02:08:32,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:32,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:33,050 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 02:08:33,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:33,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695661487] [2024-11-28 02:08:33,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695661487] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:33,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:33,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:08:33,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727921278] [2024-11-28 02:08:33,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:33,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:08:33,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:33,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:08:33,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:08:33,052 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:33,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:33,105 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2024-11-28 02:08:33,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:08:33,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-28 02:08:33,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:33,107 INFO L225 Difference]: With dead ends: 95 [2024-11-28 02:08:33,107 INFO L226 Difference]: Without dead ends: 95 [2024-11-28 02:08:33,107 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:08:33,108 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:33,108 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 169 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:08:33,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-28 02:08:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-28 02:08:33,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 79 states have (on average 1.379746835443038) internal successors, (109), 94 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:33,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2024-11-28 02:08:33,111 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 21 [2024-11-28 02:08:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:33,111 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2024-11-28 02:08:33,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:33,112 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2024-11-28 02:08:33,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-28 02:08:33,112 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:33,112 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] [2024-11-28 02:08:33,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 02:08:33,113 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:33,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:33,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1643181138, now seen corresponding path program 1 times [2024-11-28 02:08:33,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:33,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412747442] [2024-11-28 02:08:33,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:33,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:33,397 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 02:08:33,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:33,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412747442] [2024-11-28 02:08:33,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412747442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:33,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210282574] [2024-11-28 02:08:33,398 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:33,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:33,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:33,400 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:33,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:08:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:33,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:08:33,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:33,492 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 02:08:33,582 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 02:08:33,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:33,708 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 02:08:33,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210282574] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:33,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:08:33,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 13 [2024-11-28 02:08:33,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440118862] [2024-11-28 02:08:33,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:33,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:08:33,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:33,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:08:33,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:08:33,709 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:33,799 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2024-11-28 02:08:33,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:08:33,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-28 02:08:33,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:33,800 INFO L225 Difference]: With dead ends: 96 [2024-11-28 02:08:33,800 INFO L226 Difference]: Without dead ends: 96 [2024-11-28 02:08:33,801 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:08:33,801 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 5 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:33,802 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 230 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:33,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-28 02:08:33,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2024-11-28 02:08:33,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 79 states have (on average 1.3670886075949367) internal successors, (108), 93 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:33,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2024-11-28 02:08:33,805 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 21 [2024-11-28 02:08:33,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:33,805 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2024-11-28 02:08:33,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:33,805 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2024-11-28 02:08:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 02:08:33,806 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:33,806 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] [2024-11-28 02:08:33,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:08:34,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:34,010 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:34,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:34,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2027959735, now seen corresponding path program 1 times [2024-11-28 02:08:34,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:34,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56637549] [2024-11-28 02:08:34,010 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:34,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:34,109 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 02:08:34,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:34,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56637549] [2024-11-28 02:08:34,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56637549] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:34,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:34,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:08:34,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860758726] [2024-11-28 02:08:34,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:34,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:08:34,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:34,111 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:08:34,111 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:08:34,112 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:34,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:34,187 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2024-11-28 02:08:34,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:08:34,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-28 02:08:34,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:34,188 INFO L225 Difference]: With dead ends: 93 [2024-11-28 02:08:34,188 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 02:08:34,190 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 02:08:34,191 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 64 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:34,191 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 154 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:34,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 02:08:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-28 02:08:34,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 79 states have (on average 1.3544303797468353) internal successors, (107), 92 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 02:08:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2024-11-28 02:08:34,194 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 24 [2024-11-28 02:08:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:34,194 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2024-11-28 02:08:34,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2024-11-28 02:08:34,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 02:08:34,195 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:34,195 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] [2024-11-28 02:08:34,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 02:08:34,195 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:34,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:34,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2027959736, now seen corresponding path program 1 times [2024-11-28 02:08:34,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:34,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404868532] [2024-11-28 02:08:34,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:34,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:34,492 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 02:08:34,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:34,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404868532] [2024-11-28 02:08:34,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404868532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:34,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750504399] [2024-11-28 02:08:34,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:34,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:34,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:34,498 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:34,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:08:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:34,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 02:08:34,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:34,623 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 02:08:34,646 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 02:08:34,647 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:08:34,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750504399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:34,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:08:34,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 13 [2024-11-28 02:08:34,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865398930] [2024-11-28 02:08:34,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:34,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:08:34,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:34,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:08:34,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:08:34,648 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:34,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:34,704 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2024-11-28 02:08:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:08:34,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-28 02:08:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:34,705 INFO L225 Difference]: With dead ends: 100 [2024-11-28 02:08:34,706 INFO L226 Difference]: Without dead ends: 100 [2024-11-28 02:08:34,706 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:08:34,707 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:34,707 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 400 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:34,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-28 02:08:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-11-28 02:08:34,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 99 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2024-11-28 02:08:34,712 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 24 [2024-11-28 02:08:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:34,712 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2024-11-28 02:08:34,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2024-11-28 02:08:34,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 02:08:34,714 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:34,714 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] [2024-11-28 02:08:34,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:08:34,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 02:08:34,915 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:34,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:34,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1844305734, now seen corresponding path program 1 times [2024-11-28 02:08:34,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:34,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173324763] [2024-11-28 02:08:34,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:34,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:35,197 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 02:08:35,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:35,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173324763] [2024-11-28 02:08:35,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173324763] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:35,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465357866] [2024-11-28 02:08:35,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:35,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:35,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:35,202 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:35,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:08:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:35,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 02:08:35,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:35,372 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 02:08:35,394 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 02:08:35,395 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:35,408 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 02:08:35,410 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 02:08:35,491 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 02:08:35,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465357866] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:35,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:35,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2024-11-28 02:08:35,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167470030] [2024-11-28 02:08:35,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:35,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 02:08:35,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:35,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 02:08:35,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-28 02:08:35,492 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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 02:08:35,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:35,693 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2024-11-28 02:08:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:08:35,694 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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 24 [2024-11-28 02:08:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:35,695 INFO L225 Difference]: With dead ends: 114 [2024-11-28 02:08:35,695 INFO L226 Difference]: Without dead ends: 114 [2024-11-28 02:08:35,696 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2024-11-28 02:08:35,696 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 50 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:35,697 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 713 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-28 02:08:35,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2024-11-28 02:08:35,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 90 states have (on average 1.3222222222222222) internal successors, (119), 103 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2024-11-28 02:08:35,701 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 24 [2024-11-28 02:08:35,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:35,701 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2024-11-28 02:08:35,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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 02:08:35,702 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2024-11-28 02:08:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 02:08:35,702 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:35,702 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] [2024-11-28 02:08:35,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 02:08:35,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:35,907 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:35,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1042615402, now seen corresponding path program 1 times [2024-11-28 02:08:35,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:35,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597553769] [2024-11-28 02:08:35,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:35,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:36,060 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 02:08:36,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:36,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597553769] [2024-11-28 02:08:36,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597553769] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:36,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:36,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:08:36,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482995387] [2024-11-28 02:08:36,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:36,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:08:36,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:36,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:08:36,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:08:36,061 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:36,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:36,107 INFO L93 Difference]: Finished difference Result 103 states and 118 transitions. [2024-11-28 02:08:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:08:36,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-28 02:08:36,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:36,108 INFO L225 Difference]: With dead ends: 103 [2024-11-28 02:08:36,108 INFO L226 Difference]: Without dead ends: 74 [2024-11-28 02:08:36,108 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 02:08:36,109 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 52 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:36,109 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:08:36,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-28 02:08:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-28 02:08:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 61 states have (on average 1.360655737704918) internal successors, (83), 73 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 02:08:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2024-11-28 02:08:36,113 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 26 [2024-11-28 02:08:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:36,113 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2024-11-28 02:08:36,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2024-11-28 02:08:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 02:08:36,114 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:36,114 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:36,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 02:08:36,115 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:36,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:36,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1744560435, now seen corresponding path program 2 times [2024-11-28 02:08:36,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:36,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848918015] [2024-11-28 02:08:36,116 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:08:36,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:36,131 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:08:36,131 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:08:36,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:36,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848918015] [2024-11-28 02:08:36,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848918015] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:36,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:36,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 02:08:36,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179083606] [2024-11-28 02:08:36,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:36,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:08:36,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:36,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:08:36,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:08:36,435 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:36,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:36,620 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2024-11-28 02:08:36,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:08:36,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-28 02:08:36,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:36,622 INFO L225 Difference]: With dead ends: 78 [2024-11-28 02:08:36,622 INFO L226 Difference]: Without dead ends: 78 [2024-11-28 02:08:36,622 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:08:36,622 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 106 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:36,623 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 216 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:36,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-28 02:08:36,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2024-11-28 02:08:36,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 74 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 02:08:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2024-11-28 02:08:36,626 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 28 [2024-11-28 02:08:36,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:36,626 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2024-11-28 02:08:36,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:36,626 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2024-11-28 02:08:36,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 02:08:36,627 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:36,627 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:36,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 02:08:36,627 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:36,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:36,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1199315790, now seen corresponding path program 1 times [2024-11-28 02:08:36,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:36,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509650650] [2024-11-28 02:08:36,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:36,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:08:37,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:37,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509650650] [2024-11-28 02:08:37,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509650650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:37,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686546956] [2024-11-28 02:08:37,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:37,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:37,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:37,098 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:37,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:08:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:37,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 02:08:37,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:37,305 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 02:08:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:08:37,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:37,363 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 02:08:37,365 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 02:08:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:08:37,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686546956] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:37,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:37,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 21 [2024-11-28 02:08:37,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806147923] [2024-11-28 02:08:37,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:37,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 02:08:37,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:37,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 02:08:37,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:08:37,439 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:37,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:37,740 INFO L93 Difference]: Finished difference Result 127 states and 142 transitions. [2024-11-28 02:08:37,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:08:37,740 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-28 02:08:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:37,741 INFO L225 Difference]: With dead ends: 127 [2024-11-28 02:08:37,741 INFO L226 Difference]: Without dead ends: 127 [2024-11-28 02:08:37,742 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-11-28 02:08:37,742 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 68 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:37,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 661 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:08:37,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-28 02:08:37,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2024-11-28 02:08:37,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 75 states have (on average 1.3066666666666666) internal successors, (98), 87 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2024-11-28 02:08:37,750 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 31 [2024-11-28 02:08:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:37,750 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2024-11-28 02:08:37,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2024-11-28 02:08:37,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 02:08:37,750 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:37,750 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:37,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 02:08:37,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:37,951 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:37,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:37,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1077662685, now seen corresponding path program 1 times [2024-11-28 02:08:37,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:37,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007197393] [2024-11-28 02:08:37,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:37,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:08:38,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:38,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007197393] [2024-11-28 02:08:38,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007197393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:38,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:38,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:08:38,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040507249] [2024-11-28 02:08:38,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:38,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:08:38,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:38,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:08:38,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:08:38,030 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:38,092 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2024-11-28 02:08:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:08:38,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-28 02:08:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:38,094 INFO L225 Difference]: With dead ends: 87 [2024-11-28 02:08:38,094 INFO L226 Difference]: Without dead ends: 87 [2024-11-28 02:08:38,094 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 02:08:38,095 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 41 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:38,095 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 140 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-28 02:08:38,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-28 02:08:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 75 states have (on average 1.2933333333333332) internal successors, (97), 86 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2024-11-28 02:08:38,099 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 34 [2024-11-28 02:08:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:38,099 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2024-11-28 02:08:38,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:38,099 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2024-11-28 02:08:38,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 02:08:38,100 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:38,100 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:38,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-28 02:08:38,100 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:38,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:38,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1077662686, now seen corresponding path program 1 times [2024-11-28 02:08:38,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:38,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917829001] [2024-11-28 02:08:38,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:38,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:08:38,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:38,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917829001] [2024-11-28 02:08:38,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917829001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:38,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673545689] [2024-11-28 02:08:38,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:38,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:38,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:38,283 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:38,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:08:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:38,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 02:08:38,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:08:38,548 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:38,668 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 02:08:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:08:38,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673545689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:38,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:38,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-28 02:08:38,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534453431] [2024-11-28 02:08:38,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:38,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:08:38,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:38,685 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:08:38,685 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:08:38,685 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 11 states, 10 states have (on average 5.6) internal successors, (56), 11 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 02:08:38,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:38,836 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2024-11-28 02:08:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:08:38,837 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 11 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) Word has length 34 [2024-11-28 02:08:38,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:38,838 INFO L225 Difference]: With dead ends: 93 [2024-11-28 02:08:38,838 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 02:08:38,838 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 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 02:08:38,840 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 8 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:38,840 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 304 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:38,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 02:08:38,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2024-11-28 02:08:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 89 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 02:08:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2024-11-28 02:08:38,843 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 34 [2024-11-28 02:08:38,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:38,844 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2024-11-28 02:08:38,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 11 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 02:08:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2024-11-28 02:08:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 02:08:38,844 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:38,845 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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 02:08:38,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:08:39,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 02:08:39,049 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:39,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:39,050 INFO L85 PathProgramCache]: Analyzing trace with hash 361781785, now seen corresponding path program 2 times [2024-11-28 02:08:39,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:39,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631024942] [2024-11-28 02:08:39,050 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:08:39,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:39,075 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:08:39,075 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:08:39,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:39,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631024942] [2024-11-28 02:08:39,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631024942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:39,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734929820] [2024-11-28 02:08:39,500 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:08:39,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:39,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:39,502 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:39,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:08:39,606 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:08:39,606 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:39,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 02:08:39,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:39,619 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 02:08:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:08:39,818 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:08:40,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734929820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:40,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:40,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-28 02:08:40,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732431400] [2024-11-28 02:08:40,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:40,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 02:08:40,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:40,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 02:08:40,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2024-11-28 02:08:40,245 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 27 states, 26 states have (on average 3.5) internal successors, (91), 27 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:40,940 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2024-11-28 02:08:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 02:08:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.5) internal successors, (91), 27 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-28 02:08:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:40,942 INFO L225 Difference]: With dead ends: 137 [2024-11-28 02:08:40,942 INFO L226 Difference]: Without dead ends: 137 [2024-11-28 02:08:40,943 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 02:08:40,943 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 95 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:40,944 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 999 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:08:40,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-28 02:08:40,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 93. [2024-11-28 02:08:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 92 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 02:08:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2024-11-28 02:08:40,947 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 35 [2024-11-28 02:08:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:40,948 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2024-11-28 02:08:40,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.5) internal successors, (91), 27 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2024-11-28 02:08:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 02:08:40,949 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:40,949 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:40,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 02:08:41,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 02:08:41,153 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:41,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:41,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1768225292, now seen corresponding path program 3 times [2024-11-28 02:08:41,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:41,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725101699] [2024-11-28 02:08:41,154 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:08:41,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:41,202 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:08:41,204 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:08:41,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:41,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725101699] [2024-11-28 02:08:41,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725101699] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:41,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586284716] [2024-11-28 02:08:41,768 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:08:41,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:41,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:41,771 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:41,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:08:41,887 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:08:41,887 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:41,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-28 02:08:41,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:42,016 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 02:08:46,679 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-28 02:08:46,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 31 [2024-11-28 02:08:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 1 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:08:46,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:47,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-28 02:08:47,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:08:47,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 34 [2024-11-28 02:08:47,660 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 02:08:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:08:48,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586284716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:48,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:48,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 34 [2024-11-28 02:08:48,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943746815] [2024-11-28 02:08:48,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:48,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 02:08:48,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:48,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 02:08:48,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1073, Unknown=1, NotChecked=0, Total=1190 [2024-11-28 02:08:48,077 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 35 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 02:08:50,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:50,718 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2024-11-28 02:08:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:08:50,719 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 35 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) Word has length 38 [2024-11-28 02:08:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:50,720 INFO L225 Difference]: With dead ends: 96 [2024-11-28 02:08:50,720 INFO L226 Difference]: Without dead ends: 96 [2024-11-28 02:08:50,721 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=370, Invalid=2179, Unknown=1, NotChecked=0, Total=2550 [2024-11-28 02:08:50,721 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 232 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:50,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 772 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:08:50,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-28 02:08:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2024-11-28 02:08:50,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 77 states have (on average 1.2727272727272727) internal successors, (98), 87 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2024-11-28 02:08:50,725 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 38 [2024-11-28 02:08:50,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:50,725 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2024-11-28 02:08:50,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 35 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 02:08:50,726 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2024-11-28 02:08:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 02:08:50,726 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:50,726 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, 1, 1, 1] [2024-11-28 02:08:50,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 02:08:50,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 02:08:50,931 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:50,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:50,931 INFO L85 PathProgramCache]: Analyzing trace with hash 939782569, now seen corresponding path program 1 times [2024-11-28 02:08:50,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:50,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430550054] [2024-11-28 02:08:50,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:50,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:51,238 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 02:08:51,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:51,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430550054] [2024-11-28 02:08:51,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430550054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:51,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384299813] [2024-11-28 02:08:51,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:51,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:51,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:51,242 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:51,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:08:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:51,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 02:08:51,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:51,415 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 02:08:51,458 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 02:08:51,459 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:08:51,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384299813] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:51,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:08:51,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 11 [2024-11-28 02:08:51,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524563866] [2024-11-28 02:08:51,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:51,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 02:08:51,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:51,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 02:08:51,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:08:51,460 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:51,539 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2024-11-28 02:08:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:08:51,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-28 02:08:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:51,540 INFO L225 Difference]: With dead ends: 128 [2024-11-28 02:08:51,540 INFO L226 Difference]: Without dead ends: 81 [2024-11-28 02:08:51,541 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:08:51,541 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:51,542 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 397 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-28 02:08:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-28 02:08:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 80 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2024-11-28 02:08:51,548 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 39 [2024-11-28 02:08:51,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:51,548 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2024-11-28 02:08:51,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:51,548 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2024-11-28 02:08:51,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 02:08:51,549 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:51,549 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, 1, 1, 1] [2024-11-28 02:08:51,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 02:08:51,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 02:08:51,750 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:51,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:51,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1599314091, now seen corresponding path program 1 times [2024-11-28 02:08:51,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:51,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943901628] [2024-11-28 02:08:51,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:51,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:52,076 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 02:08:52,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:52,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943901628] [2024-11-28 02:08:52,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943901628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:52,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873153112] [2024-11-28 02:08:52,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:52,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:52,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:52,080 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:52,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:08:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:52,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 02:08:52,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:52,284 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 02:08:52,324 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 02:08:52,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:52,357 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 02:08:52,360 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 02:08:52,448 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 02:08:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873153112] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:52,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:52,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-28 02:08:52,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564183509] [2024-11-28 02:08:52,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:52,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 02:08:52,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:52,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 02:08:52,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-28 02:08:52,450 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:52,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:52,601 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2024-11-28 02:08:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:08:52,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-28 02:08:52,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:52,602 INFO L225 Difference]: With dead ends: 128 [2024-11-28 02:08:52,602 INFO L226 Difference]: Without dead ends: 88 [2024-11-28 02:08:52,602 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-11-28 02:08:52,602 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 29 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:52,603 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 442 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-28 02:08:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2024-11-28 02:08:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 84 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 02:08:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2024-11-28 02:08:52,606 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 39 [2024-11-28 02:08:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:52,606 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2024-11-28 02:08:52,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2024-11-28 02:08:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 02:08:52,607 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:52,607 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, 1, 1, 1] [2024-11-28 02:08:52,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 02:08:52,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 02:08:52,811 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:52,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:52,811 INFO L85 PathProgramCache]: Analyzing trace with hash 132135122, now seen corresponding path program 2 times [2024-11-28 02:08:52,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:52,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647826287] [2024-11-28 02:08:52,812 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:08:52,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:52,829 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:08:52,829 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:53,180 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 02:08:53,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:53,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647826287] [2024-11-28 02:08:53,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647826287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:53,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021991082] [2024-11-28 02:08:53,181 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:08:53,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:53,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:53,183 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:53,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:08:53,303 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:08:53,303 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:53,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 02:08:53,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:53,490 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 02:08:53,490 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:53,712 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 02:08:53,782 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 02:08:53,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021991082] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:53,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:53,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-28 02:08:53,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134435894] [2024-11-28 02:08:53,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:53,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 02:08:53,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:53,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 02:08:53,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:08:53,785 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 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 02:08:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:54,123 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2024-11-28 02:08:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:08:54,123 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 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 43 [2024-11-28 02:08:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:54,124 INFO L225 Difference]: With dead ends: 119 [2024-11-28 02:08:54,124 INFO L226 Difference]: Without dead ends: 119 [2024-11-28 02:08:54,124 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:08:54,125 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 89 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:54,125 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 570 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:08:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-28 02:08:54,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 107. [2024-11-28 02:08:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 106 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 02:08:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2024-11-28 02:08:54,129 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 43 [2024-11-28 02:08:54,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:54,129 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2024-11-28 02:08:54,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 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 02:08:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2024-11-28 02:08:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 02:08:54,130 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:54,130 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:54,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 02:08:54,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 02:08:54,334 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:54,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:54,334 INFO L85 PathProgramCache]: Analyzing trace with hash -198699902, now seen corresponding path program 1 times [2024-11-28 02:08:54,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:54,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737125562] [2024-11-28 02:08:54,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:54,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:08:54,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:54,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737125562] [2024-11-28 02:08:54,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737125562] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:54,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:54,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:08:54,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470623139] [2024-11-28 02:08:54,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:54,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:08:54,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:54,426 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:08:54,426 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:08:54,426 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:54,499 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2024-11-28 02:08:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:08:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-28 02:08:54,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:54,500 INFO L225 Difference]: With dead ends: 107 [2024-11-28 02:08:54,500 INFO L226 Difference]: Without dead ends: 107 [2024-11-28 02:08:54,500 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:08:54,501 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 48 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:54,501 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 116 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-28 02:08:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-11-28 02:08:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 96 states have (on average 1.3229166666666667) internal successors, (127), 104 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2024-11-28 02:08:54,504 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 44 [2024-11-28 02:08:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:54,505 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2024-11-28 02:08:54,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:54,505 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2024-11-28 02:08:54,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 02:08:54,505 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:54,505 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:54,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-28 02:08:54,506 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:54,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:54,506 INFO L85 PathProgramCache]: Analyzing trace with hash -198699901, now seen corresponding path program 1 times [2024-11-28 02:08:54,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:54,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248229616] [2024-11-28 02:08:54,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:54,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:08:54,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:54,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248229616] [2024-11-28 02:08:54,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248229616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:54,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838903477] [2024-11-28 02:08:54,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:54,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:54,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:54,787 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:54,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:08:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:54,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 02:08:54,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:08:55,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:55,354 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 02:08:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:08:55,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838903477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:55,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:55,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-28 02:08:55,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40400] [2024-11-28 02:08:55,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:55,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 02:08:55,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:55,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 02:08:55,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-28 02:08:55,396 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 19 states, 18 states have (on average 5.5) internal successors, (99), 19 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 02:08:55,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:55,807 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2024-11-28 02:08:55,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:08:55,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.5) internal successors, (99), 19 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 44 [2024-11-28 02:08:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:55,808 INFO L225 Difference]: With dead ends: 121 [2024-11-28 02:08:55,808 INFO L226 Difference]: Without dead ends: 121 [2024-11-28 02:08:55,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-28 02:08:55,808 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 98 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:55,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 514 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:08:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-28 02:08:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2024-11-28 02:08:55,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 97 states have (on average 1.2989690721649485) internal successors, (126), 104 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 02:08:55,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2024-11-28 02:08:55,812 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 44 [2024-11-28 02:08:55,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:55,812 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2024-11-28 02:08:55,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.5) internal successors, (99), 19 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 02:08:55,812 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2024-11-28 02:08:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 02:08:55,813 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:55,813 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:55,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 02:08:56,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 02:08:56,013 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:56,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:56,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1972041853, now seen corresponding path program 1 times [2024-11-28 02:08:56,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:56,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658073083] [2024-11-28 02:08:56,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:56,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:08:56,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:56,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658073083] [2024-11-28 02:08:56,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658073083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:56,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:56,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:08:56,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618618075] [2024-11-28 02:08:56,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:56,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:08:56,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:56,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:08:56,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:08:56,118 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:56,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:56,211 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2024-11-28 02:08:56,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:08:56,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-28 02:08:56,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:56,212 INFO L225 Difference]: With dead ends: 106 [2024-11-28 02:08:56,212 INFO L226 Difference]: Without dead ends: 106 [2024-11-28 02:08:56,212 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 02:08:56,213 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 52 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:56,213 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 150 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-28 02:08:56,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2024-11-28 02:08:56,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 97 states have (on average 1.2783505154639174) internal successors, (124), 103 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:56,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2024-11-28 02:08:56,217 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 46 [2024-11-28 02:08:56,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:56,217 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2024-11-28 02:08:56,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:56,218 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2024-11-28 02:08:56,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 02:08:56,218 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:56,218 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:56,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-28 02:08:56,218 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:56,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:56,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1972041852, now seen corresponding path program 1 times [2024-11-28 02:08:56,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:56,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963427801] [2024-11-28 02:08:56,219 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:56,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:08:56,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:56,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963427801] [2024-11-28 02:08:56,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963427801] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:56,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111716617] [2024-11-28 02:08:56,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:56,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:56,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:56,595 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:56,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 02:08:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:56,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 02:08:56,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:56,741 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 02:08:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:08:56,914 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:08:57,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111716617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:57,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:57,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2024-11-28 02:08:57,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229472019] [2024-11-28 02:08:57,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:57,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 02:08:57,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:57,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 02:08:57,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-11-28 02:08:57,222 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 22 states, 21 states have (on average 4.714285714285714) internal successors, (99), 22 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 02:08:57,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:57,558 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2024-11-28 02:08:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:08:57,559 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.714285714285714) internal successors, (99), 22 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 46 [2024-11-28 02:08:57,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:57,559 INFO L225 Difference]: With dead ends: 112 [2024-11-28 02:08:57,559 INFO L226 Difference]: Without dead ends: 112 [2024-11-28 02:08:57,560 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-11-28 02:08:57,560 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 83 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:57,560 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 417 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:08:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-28 02:08:57,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2024-11-28 02:08:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 102 states have (on average 1.2745098039215685) internal successors, (130), 108 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2024-11-28 02:08:57,564 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 46 [2024-11-28 02:08:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:57,564 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2024-11-28 02:08:57,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.714285714285714) internal successors, (99), 22 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 02:08:57,564 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2024-11-28 02:08:57,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 02:08:57,565 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:57,565 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, 1, 1, 1] [2024-11-28 02:08:57,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 02:08:57,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:57,769 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:57,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:57,769 INFO L85 PathProgramCache]: Analyzing trace with hash -606304971, now seen corresponding path program 3 times [2024-11-28 02:08:57,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:57,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760360708] [2024-11-28 02:08:57,769 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:08:57,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:57,814 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:08:57,815 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:58,318 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 02:08:58,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:58,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760360708] [2024-11-28 02:08:58,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760360708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:58,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640240907] [2024-11-28 02:08:58,319 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:08:58,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:58,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:58,321 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:58,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 02:08:58,467 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:08:58,468 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:58,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 02:08:58,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:58,582 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 02:08:58,660 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 02:08:58,661 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:58,706 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 02:08:58,710 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 02:08:58,798 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 02:08:58,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640240907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:58,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:58,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 23 [2024-11-28 02:08:58,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491717051] [2024-11-28 02:08:58,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:58,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 02:08:58,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:58,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 02:08:58,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2024-11-28 02:08:58,799 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:59,081 INFO L93 Difference]: Finished difference Result 187 states and 216 transitions. [2024-11-28 02:08:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:08:59,081 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-28 02:08:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:59,082 INFO L225 Difference]: With dead ends: 187 [2024-11-28 02:08:59,082 INFO L226 Difference]: Without dead ends: 178 [2024-11-28 02:08:59,083 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-11-28 02:08:59,083 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 44 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:59,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 806 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:08:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-28 02:08:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 169. [2024-11-28 02:08:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 162 states have (on average 1.2345679012345678) internal successors, (200), 168 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2024-11-28 02:08:59,090 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 48 [2024-11-28 02:08:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:59,090 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2024-11-28 02:08:59,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2024-11-28 02:08:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 02:08:59,091 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:59,091 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:59,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 02:08:59,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:59,296 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:59,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:59,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1051639740, now seen corresponding path program 1 times [2024-11-28 02:08:59,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:59,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102239131] [2024-11-28 02:08:59,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:59,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:08:59,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:59,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102239131] [2024-11-28 02:08:59,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102239131] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:59,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:59,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:08:59,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298882590] [2024-11-28 02:08:59,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:59,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:08:59,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:59,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:08:59,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:08:59,400 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:59,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:59,490 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2024-11-28 02:08:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:08:59,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-28 02:08:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:59,492 INFO L225 Difference]: With dead ends: 170 [2024-11-28 02:08:59,492 INFO L226 Difference]: Without dead ends: 170 [2024-11-28 02:08:59,493 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 02:08:59,493 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 40 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:59,493 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 151 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-28 02:08:59,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2024-11-28 02:08:59,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.2160493827160495) internal successors, (197), 167 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2024-11-28 02:08:59,499 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 48 [2024-11-28 02:08:59,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:59,500 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2024-11-28 02:08:59,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:59,500 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2024-11-28 02:08:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 02:08:59,501 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:59,501 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:59,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-28 02:08:59,501 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:08:59,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:59,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1051639739, now seen corresponding path program 1 times [2024-11-28 02:08:59,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:59,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143120804] [2024-11-28 02:08:59,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:59,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:08:59,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:59,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143120804] [2024-11-28 02:08:59,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143120804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:59,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833051055] [2024-11-28 02:08:59,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:59,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:59,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:59,855 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:59,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 02:08:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:59,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 02:08:59,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:09:00,241 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:00,566 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 02:09:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:09:00,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833051055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:00,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:00,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-28 02:09:00,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141549777] [2024-11-28 02:09:00,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:00,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 02:09:00,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:00,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 02:09:00,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:09:00,608 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand has 21 states, 20 states have (on average 5.35) internal successors, (107), 21 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 02:09:00,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:09:00,962 INFO L93 Difference]: Finished difference Result 178 states and 203 transitions. [2024-11-28 02:09:00,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:09:00,962 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.35) internal successors, (107), 21 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) Word has length 48 [2024-11-28 02:09:00,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:09:00,963 INFO L225 Difference]: With dead ends: 178 [2024-11-28 02:09:00,963 INFO L226 Difference]: Without dead ends: 178 [2024-11-28 02:09:00,964 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-11-28 02:09:00,964 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 115 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:09:00,964 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 445 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:09:00,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-28 02:09:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 167. [2024-11-28 02:09:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.1975308641975309) internal successors, (194), 166 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 194 transitions. [2024-11-28 02:09:00,969 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 194 transitions. Word has length 48 [2024-11-28 02:09:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:09:00,969 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 194 transitions. [2024-11-28 02:09:00,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.35) internal successors, (107), 21 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 02:09:00,969 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 194 transitions. [2024-11-28 02:09:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 02:09:00,970 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:09:00,970 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:09:00,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 02:09:01,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-28 02:09:01,175 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:09:01,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:01,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1308779835, now seen corresponding path program 1 times [2024-11-28 02:09:01,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:01,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052011380] [2024-11-28 02:09:01,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:09:01,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:09:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:09:01,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:01,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052011380] [2024-11-28 02:09:01,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052011380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:09:01,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:09:01,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:09:01,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902371818] [2024-11-28 02:09:01,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:09:01,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:09:01,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:01,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:09:01,281 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:09:01,281 INFO L87 Difference]: Start difference. First operand 167 states and 194 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:09:01,371 INFO L93 Difference]: Finished difference Result 168 states and 193 transitions. [2024-11-28 02:09:01,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:09:01,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-28 02:09:01,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:09:01,372 INFO L225 Difference]: With dead ends: 168 [2024-11-28 02:09:01,372 INFO L226 Difference]: Without dead ends: 168 [2024-11-28 02:09:01,372 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:09:01,373 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 44 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:09:01,373 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 147 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:09:01,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-28 02:09:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2024-11-28 02:09:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 162 states have (on average 1.1790123456790123) internal successors, (191), 165 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 02:09:01,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 191 transitions. [2024-11-28 02:09:01,377 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 191 transitions. Word has length 50 [2024-11-28 02:09:01,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:09:01,377 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 191 transitions. [2024-11-28 02:09:01,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:01,377 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 191 transitions. [2024-11-28 02:09:01,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 02:09:01,380 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:09:01,380 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:09:01,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-28 02:09:01,380 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:09:01,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:01,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1308779834, now seen corresponding path program 1 times [2024-11-28 02:09:01,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:01,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209568933] [2024-11-28 02:09:01,381 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:09:01,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:09:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:09:01,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:01,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209568933] [2024-11-28 02:09:01,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209568933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:09:01,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894798870] [2024-11-28 02:09:01,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:09:01,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:01,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:09:01,851 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:09:01,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 02:09:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:09:01,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 02:09:01,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:02,003 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 02:09:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:09:02,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:09:02,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894798870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:02,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:02,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2024-11-28 02:09:02,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109191349] [2024-11-28 02:09:02,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:02,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:09:02,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:02,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:09:02,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:09:02,571 INFO L87 Difference]: Start difference. First operand 166 states and 191 transitions. Second operand has 25 states, 24 states have (on average 4.458333333333333) internal successors, (107), 25 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 02:09:03,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:09:03,019 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2024-11-28 02:09:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 02:09:03,020 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.458333333333333) internal successors, (107), 25 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) Word has length 50 [2024-11-28 02:09:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:09:03,021 INFO L225 Difference]: With dead ends: 201 [2024-11-28 02:09:03,021 INFO L226 Difference]: Without dead ends: 198 [2024-11-28 02:09:03,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2024-11-28 02:09:03,022 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 68 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:09:03,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 461 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:09:03,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-28 02:09:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 175. [2024-11-28 02:09:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 171 states have (on average 1.1812865497076024) internal successors, (202), 174 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 02:09:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 202 transitions. [2024-11-28 02:09:03,027 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 202 transitions. Word has length 50 [2024-11-28 02:09:03,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:09:03,028 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 202 transitions. [2024-11-28 02:09:03,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.458333333333333) internal successors, (107), 25 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 02:09:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 202 transitions. [2024-11-28 02:09:03,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 02:09:03,029 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:09:03,031 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:09:03,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 02:09:03,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 02:09:03,232 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:09:03,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:03,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1907922061, now seen corresponding path program 1 times [2024-11-28 02:09:03,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:03,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474616554] [2024-11-28 02:09:03,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:09:03,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:09:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:09:03,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:03,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474616554] [2024-11-28 02:09:03,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474616554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:09:03,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:09:03,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:09:03,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690347676] [2024-11-28 02:09:03,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:09:03,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:09:03,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:03,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:09:03,373 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:09:03,373 INFO L87 Difference]: Start difference. First operand 175 states and 202 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:03,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:09:03,427 INFO L93 Difference]: Finished difference Result 217 states and 247 transitions. [2024-11-28 02:09:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:09:03,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-28 02:09:03,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:09:03,428 INFO L225 Difference]: With dead ends: 217 [2024-11-28 02:09:03,428 INFO L226 Difference]: Without dead ends: 198 [2024-11-28 02:09:03,429 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:09:03,429 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 7 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:09:03,429 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 265 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:09:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-28 02:09:03,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2024-11-28 02:09:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.1780104712041886) internal successors, (225), 194 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 225 transitions. [2024-11-28 02:09:03,435 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 225 transitions. Word has length 51 [2024-11-28 02:09:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:09:03,435 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 225 transitions. [2024-11-28 02:09:03,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 225 transitions. [2024-11-28 02:09:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 02:09:03,436 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:09:03,436 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, 1, 1, 1] [2024-11-28 02:09:03,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-11-28 02:09:03,436 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:09:03,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:03,437 INFO L85 PathProgramCache]: Analyzing trace with hash 783556846, now seen corresponding path program 4 times [2024-11-28 02:09:03,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:03,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945777615] [2024-11-28 02:09:03,437 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:09:03,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:03,458 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:09:03,458 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:09:04,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:04,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945777615] [2024-11-28 02:09:04,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945777615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:09:04,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780198142] [2024-11-28 02:09:04,273 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:09:04,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:04,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:09:04,275 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:09:04,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 02:09:04,416 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:09:04,416 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:04,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 02:09:04,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:04,630 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 02:09:05,391 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-11-28 02:09:05,391 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 02:09:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:09:05,553 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:06,345 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 02:09:06,353 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 45 treesize of output 39 [2024-11-28 02:09:06,815 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 02:09:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:09:06,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780198142] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:06,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:06,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 44 [2024-11-28 02:09:06,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627503661] [2024-11-28 02:09:06,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:06,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 02:09:06,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:06,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 02:09:06,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 02:09:06,833 INFO L87 Difference]: Start difference. First operand 195 states and 225 transitions. Second operand has 45 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 45 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:09:07,744 INFO L93 Difference]: Finished difference Result 197 states and 223 transitions. [2024-11-28 02:09:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 02:09:07,744 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 45 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-28 02:09:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:09:07,745 INFO L225 Difference]: With dead ends: 197 [2024-11-28 02:09:07,745 INFO L226 Difference]: Without dead ends: 163 [2024-11-28 02:09:07,746 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=319, Invalid=2543, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 02:09:07,747 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 164 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:09:07,747 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 651 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:09:07,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-28 02:09:07,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 137. [2024-11-28 02:09:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 134 states have (on average 1.1567164179104477) internal successors, (155), 136 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2024-11-28 02:09:07,751 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 52 [2024-11-28 02:09:07,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:09:07,751 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2024-11-28 02:09:07,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 45 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2024-11-28 02:09:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 02:09:07,752 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:09:07,752 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:09:07,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 02:09:07,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 02:09:07,953 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:09:07,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:07,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1275387995, now seen corresponding path program 1 times [2024-11-28 02:09:07,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:07,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678341598] [2024-11-28 02:09:07,953 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:09:07,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:09:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:09:08,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:08,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678341598] [2024-11-28 02:09:08,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678341598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:09:08,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344690531] [2024-11-28 02:09:08,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:09:08,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:08,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:09:08,132 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:09:08,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 02:09:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:09:08,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-28 02:09:08,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:08,416 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 02:09:08,438 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 8 treesize of output 1 [2024-11-28 02:09:08,701 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 16 treesize of output 8 [2024-11-28 02:09:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:09:08,730 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:09,099 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 14 [2024-11-28 02:09:09,104 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 02:09:09,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 02:09:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:09:09,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344690531] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:09,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:09,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 18] total 35 [2024-11-28 02:09:09,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547840764] [2024-11-28 02:09:09,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:09,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 02:09:09,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:09,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 02:09:09,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 02:09:09,236 INFO L87 Difference]: Start difference. First operand 137 states and 155 transitions. Second operand has 35 states, 35 states have (on average 3.4285714285714284) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:10,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:09:10,321 INFO L93 Difference]: Finished difference Result 188 states and 207 transitions. [2024-11-28 02:09:10,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 02:09:10,322 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4285714285714284) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:09:10,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:09:10,323 INFO L225 Difference]: With dead ends: 188 [2024-11-28 02:09:10,323 INFO L226 Difference]: Without dead ends: 130 [2024-11-28 02:09:10,323 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=245, Invalid=2511, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 02:09:10,324 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 61 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:09:10,324 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 987 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 02:09:10,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-28 02:09:10,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2024-11-28 02:09:10,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 120 states have (on average 1.175) internal successors, (141), 122 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:10,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 141 transitions. [2024-11-28 02:09:10,328 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 141 transitions. Word has length 58 [2024-11-28 02:09:10,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:09:10,328 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 141 transitions. [2024-11-28 02:09:10,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4285714285714284) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:10,328 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 141 transitions. [2024-11-28 02:09:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-28 02:09:10,329 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:09:10,329 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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 02:09:10,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-28 02:09:10,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 02:09:10,529 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:09:10,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:10,530 INFO L85 PathProgramCache]: Analyzing trace with hash 555464225, now seen corresponding path program 1 times [2024-11-28 02:09:10,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:10,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674786127] [2024-11-28 02:09:10,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:09:10,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:09:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 02:09:10,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:10,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674786127] [2024-11-28 02:09:10,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674786127] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:09:10,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187488912] [2024-11-28 02:09:10,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:09:10,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:10,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:09:10,871 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:09:10,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 02:09:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:09:11,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 02:09:11,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 02:09:11,293 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:11,612 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 02:09:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 02:09:11,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187488912] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:11,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:11,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-11-28 02:09:11,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272625942] [2024-11-28 02:09:11,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:11,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 02:09:11,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:11,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 02:09:11,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-11-28 02:09:11,672 INFO L87 Difference]: Start difference. First operand 123 states and 141 transitions. Second operand has 23 states, 22 states have (on average 5.590909090909091) internal successors, (123), 23 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:09:12,142 INFO L93 Difference]: Finished difference Result 221 states and 254 transitions. [2024-11-28 02:09:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:09:12,143 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.590909090909091) internal successors, (123), 23 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2024-11-28 02:09:12,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:09:12,144 INFO L225 Difference]: With dead ends: 221 [2024-11-28 02:09:12,144 INFO L226 Difference]: Without dead ends: 221 [2024-11-28 02:09:12,144 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:09:12,144 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 85 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:09:12,145 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 645 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:09:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-28 02:09:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 174. [2024-11-28 02:09:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 171 states have (on average 1.1929824561403508) internal successors, (204), 173 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 204 transitions. [2024-11-28 02:09:12,149 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 204 transitions. Word has length 60 [2024-11-28 02:09:12,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:09:12,149 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 204 transitions. [2024-11-28 02:09:12,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.590909090909091) internal successors, (123), 23 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 204 transitions. [2024-11-28 02:09:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-28 02:09:12,150 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:09:12,150 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:09:12,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 02:09:12,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 02:09:12,355 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:09:12,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:12,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2014323617, now seen corresponding path program 2 times [2024-11-28 02:09:12,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:12,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894124980] [2024-11-28 02:09:12,355 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:09:12,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:12,389 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:09:12,389 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 02:09:12,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:12,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894124980] [2024-11-28 02:09:12,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894124980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:09:12,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711813245] [2024-11-28 02:09:12,738 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:09:12,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:12,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:09:12,740 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:09:12,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 02:09:12,921 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:09:12,922 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:12,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 02:09:12,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 02:09:13,282 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:13,484 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 02:09:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 02:09:13,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711813245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:13,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:13,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-28 02:09:13,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011285270] [2024-11-28 02:09:13,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:13,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 02:09:13,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:13,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 02:09:13,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2024-11-28 02:09:13,665 INFO L87 Difference]: Start difference. First operand 174 states and 204 transitions. Second operand has 27 states, 26 states have (on average 5.3076923076923075) internal successors, (138), 27 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 02:09:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:09:14,078 INFO L93 Difference]: Finished difference Result 192 states and 222 transitions. [2024-11-28 02:09:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:09:14,078 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 5.3076923076923075) internal successors, (138), 27 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 65 [2024-11-28 02:09:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:09:14,079 INFO L225 Difference]: With dead ends: 192 [2024-11-28 02:09:14,079 INFO L226 Difference]: Without dead ends: 192 [2024-11-28 02:09:14,080 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 02:09:14,080 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 126 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:09:14,080 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 619 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:09:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-28 02:09:14,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 178. [2024-11-28 02:09:14,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 175 states have (on average 1.2) internal successors, (210), 177 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 02:09:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 210 transitions. [2024-11-28 02:09:14,085 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 210 transitions. Word has length 65 [2024-11-28 02:09:14,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:09:14,086 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 210 transitions. [2024-11-28 02:09:14,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 5.3076923076923075) internal successors, (138), 27 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 02:09:14,086 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 210 transitions. [2024-11-28 02:09:14,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-28 02:09:14,087 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:09:14,087 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 02:09:14,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 02:09:14,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:14,291 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:09:14,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:14,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1551631778, now seen corresponding path program 2 times [2024-11-28 02:09:14,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:14,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965084263] [2024-11-28 02:09:14,292 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:09:14,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:14,326 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:09:14,327 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 02:09:15,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:15,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965084263] [2024-11-28 02:09:15,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965084263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:09:15,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776111475] [2024-11-28 02:09:15,045 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:09:15,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:15,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:09:15,047 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:09:15,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 02:09:15,224 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:09:15,225 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:15,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-28 02:09:15,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:15,411 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 02:09:15,672 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:09:15,672 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 15 treesize of output 19 [2024-11-28 02:09:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:09:15,923 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:16,395 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-28 02:09:16,395 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 23 treesize of output 22 [2024-11-28 02:09:16,404 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 02:09:16,405 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 02:09:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:09:16,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776111475] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:16,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:16,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 20] total 45 [2024-11-28 02:09:16,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343502462] [2024-11-28 02:09:16,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:16,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 02:09:16,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:16,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 02:09:16,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1842, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 02:09:16,531 INFO L87 Difference]: Start difference. First operand 178 states and 210 transitions. Second operand has 45 states, 45 states have (on average 3.111111111111111) internal successors, (140), 45 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:18,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:09:18,279 INFO L93 Difference]: Finished difference Result 442 states and 508 transitions. [2024-11-28 02:09:18,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 02:09:18,280 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.111111111111111) internal successors, (140), 45 states have internal predecessors, (140), 0 states have call successors, (0), 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 65 [2024-11-28 02:09:18,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:09:18,281 INFO L225 Difference]: With dead ends: 442 [2024-11-28 02:09:18,281 INFO L226 Difference]: Without dead ends: 378 [2024-11-28 02:09:18,283 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=385, Invalid=4727, Unknown=0, NotChecked=0, Total=5112 [2024-11-28 02:09:18,283 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 802 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:09:18,283 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 1375 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:09:18,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2024-11-28 02:09:18,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 319. [2024-11-28 02:09:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 316 states have (on average 1.2025316455696202) internal successors, (380), 318 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 380 transitions. [2024-11-28 02:09:18,291 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 380 transitions. Word has length 65 [2024-11-28 02:09:18,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:09:18,291 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 380 transitions. [2024-11-28 02:09:18,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.111111111111111) internal successors, (140), 45 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 380 transitions. [2024-11-28 02:09:18,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-28 02:09:18,292 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:09:18,292 INFO L218 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:09:18,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 02:09:18,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:18,497 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:09:18,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:18,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1265252574, now seen corresponding path program 1 times [2024-11-28 02:09:18,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:18,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394732150] [2024-11-28 02:09:18,497 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:09:18,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:09:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:09:19,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:19,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394732150] [2024-11-28 02:09:19,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394732150] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:09:19,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936676540] [2024-11-28 02:09:19,003 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:09:19,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:19,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:09:19,005 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:09:19,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 02:09:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:09:19,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 02:09:19,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:19,183 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 02:09:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:09:19,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:09:19,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936676540] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:19,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:19,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2024-11-28 02:09:19,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118710871] [2024-11-28 02:09:19,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:19,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 02:09:19,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:19,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 02:09:19,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2024-11-28 02:09:19,747 INFO L87 Difference]: Start difference. First operand 319 states and 380 transitions. Second operand has 26 states, 25 states have (on average 4.4) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:20,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:09:20,438 INFO L93 Difference]: Finished difference Result 417 states and 499 transitions. [2024-11-28 02:09:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 02:09:20,438 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.4) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-11-28 02:09:20,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:09:20,440 INFO L225 Difference]: With dead ends: 417 [2024-11-28 02:09:20,440 INFO L226 Difference]: Without dead ends: 417 [2024-11-28 02:09:20,440 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=1300, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 02:09:20,441 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 237 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:09:20,441 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 496 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:09:20,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2024-11-28 02:09:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 376. [2024-11-28 02:09:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 373 states have (on average 1.2386058981233243) internal successors, (462), 375 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 462 transitions. [2024-11-28 02:09:20,450 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 462 transitions. Word has length 67 [2024-11-28 02:09:20,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:09:20,450 INFO L471 AbstractCegarLoop]: Abstraction has 376 states and 462 transitions. [2024-11-28 02:09:20,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.4) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 462 transitions. [2024-11-28 02:09:20,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 02:09:20,451 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:09:20,451 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:09:20,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 02:09:20,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-28 02:09:20,652 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:09:20,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:20,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1961371288, now seen corresponding path program 1 times [2024-11-28 02:09:20,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:20,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898879311] [2024-11-28 02:09:20,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:09:20,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:09:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:09:21,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:21,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898879311] [2024-11-28 02:09:21,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898879311] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:09:21,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762117105] [2024-11-28 02:09:21,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:09:21,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:21,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:09:21,292 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:09:21,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 02:09:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:09:21,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-28 02:09:21,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:21,709 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 02:09:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:09:21,889 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:21,922 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 02:09:21,926 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 02:09:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:09:22,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762117105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:22,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:22,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 28 [2024-11-28 02:09:22,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374872333] [2024-11-28 02:09:22,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:22,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 02:09:22,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:22,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 02:09:22,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:09:22,041 INFO L87 Difference]: Start difference. First operand 376 states and 462 transitions. Second operand has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 28 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:22,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:09:22,798 INFO L93 Difference]: Finished difference Result 492 states and 589 transitions. [2024-11-28 02:09:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 02:09:22,799 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 28 states have internal predecessors, (97), 0 states have call successors, (0), 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 70 [2024-11-28 02:09:22,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:09:22,800 INFO L225 Difference]: With dead ends: 492 [2024-11-28 02:09:22,800 INFO L226 Difference]: Without dead ends: 480 [2024-11-28 02:09:22,801 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 02:09:22,802 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 98 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:09:22,802 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 655 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:09:22,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2024-11-28 02:09:22,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 396. [2024-11-28 02:09:22,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 393 states have (on average 1.2290076335877862) internal successors, (483), 395 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 483 transitions. [2024-11-28 02:09:22,812 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 483 transitions. Word has length 70 [2024-11-28 02:09:22,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:09:22,812 INFO L471 AbstractCegarLoop]: Abstraction has 396 states and 483 transitions. [2024-11-28 02:09:22,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 28 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:22,812 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 483 transitions. [2024-11-28 02:09:22,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 02:09:22,813 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:09:22,814 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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 02:09:22,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-28 02:09:23,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:23,018 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:09:23,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:23,018 INFO L85 PathProgramCache]: Analyzing trace with hash 357521850, now seen corresponding path program 3 times [2024-11-28 02:09:23,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:23,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125149456] [2024-11-28 02:09:23,019 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:09:23,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:23,081 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:09:23,082 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 02:09:23,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:23,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125149456] [2024-11-28 02:09:23,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125149456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:09:23,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555435696] [2024-11-28 02:09:23,968 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:09:23,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:23,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:09:23,970 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:09:23,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 02:09:24,277 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:09:24,277 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:24,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-28 02:09:24,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:24,290 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 02:09:24,294 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 02:09:24,672 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 15 treesize of output 1 [2024-11-28 02:09:24,788 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 15 treesize of output 1 [2024-11-28 02:09:24,998 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 15 treesize of output 1 [2024-11-28 02:09:25,155 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 02:09:25,239 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 15 treesize of output 1 [2024-11-28 02:09:25,388 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 02:09:26,931 INFO L349 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2024-11-28 02:09:26,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 59 [2024-11-28 02:09:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 17 proven. 46 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:09:27,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:30,869 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 70 treesize of output 62 [2024-11-28 02:09:30,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:09:30,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 118 [2024-11-28 02:09:32,622 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 24 treesize of output 22 [2024-11-28 02:09:32,629 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 258 treesize of output 254 [2024-11-28 02:09:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:09:33,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555435696] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:33,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:33,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 33, 36] total 82 [2024-11-28 02:09:33,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762333850] [2024-11-28 02:09:33,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:33,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-28 02:09:33,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:33,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-28 02:09:33,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=6327, Unknown=0, NotChecked=0, Total=6806 [2024-11-28 02:09:33,816 INFO L87 Difference]: Start difference. First operand 396 states and 483 transitions. Second operand has 83 states, 82 states have (on average 2.207317073170732) internal successors, (181), 83 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:41,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:09:41,865 INFO L93 Difference]: Finished difference Result 671 states and 813 transitions. [2024-11-28 02:09:41,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-28 02:09:41,866 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 2.207317073170732) internal successors, (181), 83 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-28 02:09:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:09:41,868 INFO L225 Difference]: With dead ends: 671 [2024-11-28 02:09:41,868 INFO L226 Difference]: Without dead ends: 671 [2024-11-28 02:09:41,871 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4772 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1488, Invalid=16068, Unknown=0, NotChecked=0, Total=17556 [2024-11-28 02:09:41,872 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 1281 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 2669 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:09:41,872 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 2054 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2669 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 02:09:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2024-11-28 02:09:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 588. [2024-11-28 02:09:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 585 states have (on average 1.2512820512820513) internal successors, (732), 587 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 732 transitions. [2024-11-28 02:09:41,882 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 732 transitions. Word has length 74 [2024-11-28 02:09:41,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:09:41,883 INFO L471 AbstractCegarLoop]: Abstraction has 588 states and 732 transitions. [2024-11-28 02:09:41,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 2.207317073170732) internal successors, (181), 83 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 732 transitions. [2024-11-28 02:09:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 02:09:41,884 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:09:41,884 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:09:41,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 02:09:42,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:42,085 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:09:42,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:42,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1415717087, now seen corresponding path program 2 times [2024-11-28 02:09:42,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:42,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326036859] [2024-11-28 02:09:42,086 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:09:42,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:42,112 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:09:42,112 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 02:09:43,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:43,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326036859] [2024-11-28 02:09:43,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326036859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:09:43,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785472925] [2024-11-28 02:09:43,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:09:43,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:43,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:09:43,182 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:09:43,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 02:09:43,392 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:09:43,392 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:43,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-28 02:09:43,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:43,765 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 02:09:43,805 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 8 treesize of output 1 [2024-11-28 02:09:44,293 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 02:09:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-28 02:09:44,387 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:44,924 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 10 [2024-11-28 02:09:44,972 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 02:09:44,975 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 02:09:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-28 02:09:45,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785472925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:45,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:45,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 53 [2024-11-28 02:09:45,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590940420] [2024-11-28 02:09:45,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:45,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-28 02:09:45,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:45,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-28 02:09:45,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2558, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 02:09:45,310 INFO L87 Difference]: Start difference. First operand 588 states and 732 transitions. Second operand has 53 states, 53 states have (on average 3.0943396226415096) internal successors, (164), 53 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 02:09:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:09:47,176 INFO L93 Difference]: Finished difference Result 638 states and 784 transitions. [2024-11-28 02:09:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 02:09:47,177 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.0943396226415096) internal successors, (164), 53 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 74 [2024-11-28 02:09:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:09:47,178 INFO L225 Difference]: With dead ends: 638 [2024-11-28 02:09:47,178 INFO L226 Difference]: Without dead ends: 596 [2024-11-28 02:09:47,178 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=402, Invalid=5298, Unknown=0, NotChecked=0, Total=5700 [2024-11-28 02:09:47,179 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 170 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:09:47,179 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1997 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 02:09:47,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2024-11-28 02:09:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 546. [2024-11-28 02:09:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 543 states have (on average 1.2412523020257826) internal successors, (674), 545 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 674 transitions. [2024-11-28 02:09:47,189 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 674 transitions. Word has length 74 [2024-11-28 02:09:47,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:09:47,189 INFO L471 AbstractCegarLoop]: Abstraction has 546 states and 674 transitions. [2024-11-28 02:09:47,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.0943396226415096) internal successors, (164), 53 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 02:09:47,190 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 674 transitions. [2024-11-28 02:09:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-28 02:09:47,191 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:09:47,191 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:09:47,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 02:09:47,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:47,392 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:09:47,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:47,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1217662155, now seen corresponding path program 1 times [2024-11-28 02:09:47,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:47,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609090509] [2024-11-28 02:09:47,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:09:47,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:09:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 02:09:48,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:48,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609090509] [2024-11-28 02:09:48,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609090509] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:09:48,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743781241] [2024-11-28 02:09:48,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:09:48,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:48,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:09:48,078 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:09:48,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 02:09:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:09:48,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 02:09:48,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:48,282 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 02:09:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 02:09:48,562 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 02:09:49,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743781241] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:49,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:49,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2024-11-28 02:09:49,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665259457] [2024-11-28 02:09:49,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:49,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 02:09:49,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:49,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 02:09:49,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2024-11-28 02:09:49,061 INFO L87 Difference]: Start difference. First operand 546 states and 674 transitions. Second operand has 32 states, 31 states have (on average 4.67741935483871) internal successors, (145), 32 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 02:09:49,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:09:49,959 INFO L93 Difference]: Finished difference Result 836 states and 1003 transitions. [2024-11-28 02:09:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 02:09:49,960 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.67741935483871) internal successors, (145), 32 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) Word has length 75 [2024-11-28 02:09:49,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:09:49,961 INFO L225 Difference]: With dead ends: 836 [2024-11-28 02:09:49,961 INFO L226 Difference]: Without dead ends: 830 [2024-11-28 02:09:49,962 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=267, Invalid=1713, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 02:09:49,962 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 243 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:09:49,962 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1071 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 02:09:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2024-11-28 02:09:49,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 553. [2024-11-28 02:09:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 550 states have (on average 1.2472727272727273) internal successors, (686), 552 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:49,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 686 transitions. [2024-11-28 02:09:49,975 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 686 transitions. Word has length 75 [2024-11-28 02:09:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:09:49,976 INFO L471 AbstractCegarLoop]: Abstraction has 553 states and 686 transitions. [2024-11-28 02:09:49,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.67741935483871) internal successors, (145), 32 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 02:09:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 686 transitions. [2024-11-28 02:09:49,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-28 02:09:49,977 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:09:49,977 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2024-11-28 02:09:49,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 02:09:50,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-28 02:09:50,178 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:09:50,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:50,179 INFO L85 PathProgramCache]: Analyzing trace with hash -897631730, now seen corresponding path program 3 times [2024-11-28 02:09:50,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:50,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369532976] [2024-11-28 02:09:50,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:09:50,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:50,224 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:09:50,225 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-28 02:09:50,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:50,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369532976] [2024-11-28 02:09:50,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369532976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:09:50,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068383273] [2024-11-28 02:09:50,431 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:09:50,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:50,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:09:50,436 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:09:50,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 02:09:50,686 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:09:50,686 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:50,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-28 02:09:50,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:51,149 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 02:09:51,210 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 8 treesize of output 1 [2024-11-28 02:09:52,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:09:52,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 27 treesize of output 15 [2024-11-28 02:09:53,262 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-28 02:09:53,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-28 02:09:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-28 02:09:53,391 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:55,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:09:55,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2024-11-28 02:09:55,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-28 02:09:55,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2024-11-28 02:09:56,447 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 15 treesize of output 11 [2024-11-28 02:09:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-28 02:09:56,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068383273] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:56,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:56,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 25, 26] total 58 [2024-11-28 02:09:56,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974408913] [2024-11-28 02:09:56,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:56,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-28 02:09:56,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:56,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-28 02:09:56,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=3088, Unknown=0, NotChecked=0, Total=3306 [2024-11-28 02:09:56,680 INFO L87 Difference]: Start difference. First operand 553 states and 686 transitions. Second operand has 58 states, 58 states have (on average 2.793103448275862) internal successors, (162), 58 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:10:06,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:10:06,868 INFO L93 Difference]: Finished difference Result 854 states and 1019 transitions. [2024-11-28 02:10:06,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-28 02:10:06,869 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.793103448275862) internal successors, (162), 58 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2024-11-28 02:10:06,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:10:06,870 INFO L225 Difference]: With dead ends: 854 [2024-11-28 02:10:06,870 INFO L226 Difference]: Without dead ends: 830 [2024-11-28 02:10:06,873 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3920 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1632, Invalid=15138, Unknown=0, NotChecked=0, Total=16770 [2024-11-28 02:10:06,873 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 888 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 2889 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:10:06,874 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1772 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2889 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-28 02:10:06,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2024-11-28 02:10:06,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 744. [2024-11-28 02:10:06,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 741 states have (on average 1.2388663967611335) internal successors, (918), 743 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:10:06,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 918 transitions. [2024-11-28 02:10:06,900 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 918 transitions. Word has length 76 [2024-11-28 02:10:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:10:06,901 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 918 transitions. [2024-11-28 02:10:06,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.793103448275862) internal successors, (162), 58 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:10:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 918 transitions. [2024-11-28 02:10:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-28 02:10:06,903 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:10:06,903 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:10:06,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-28 02:10:07,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-28 02:10:07,104 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:10:07,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:10:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash 275699098, now seen corresponding path program 3 times [2024-11-28 02:10:07,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:10:07,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737774284] [2024-11-28 02:10:07,105 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:10:07,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:10:07,141 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:10:07,141 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:10:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-28 02:10:08,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:10:08,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737774284] [2024-11-28 02:10:08,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737774284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:10:08,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144598849] [2024-11-28 02:10:08,114 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:10:08,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:10:08,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:10:08,117 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:10:08,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 02:10:08,356 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:10:08,356 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:10:08,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-28 02:10:08,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:10:08,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:10:08,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 02:10:11,583 INFO L349 Elim1Store]: treesize reduction 3, result has 88.0 percent of original size [2024-11-28 02:10:11,583 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 3 case distinctions, treesize of input 26 treesize of output 35 [2024-11-28 02:10:11,844 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-28 02:10:11,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-28 02:10:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-28 02:10:11,973 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:10:14,989 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 24 treesize of output 20 [2024-11-28 02:10:15,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:10:15,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 57 [2024-11-28 02:10:15,156 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 02:10:15,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-28 02:10:15,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2024-11-28 02:10:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-28 02:10:15,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144598849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:10:15,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:10:15,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 26, 26] total 62 [2024-11-28 02:10:15,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689669616] [2024-11-28 02:10:15,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:10:15,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-28 02:10:15,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:10:15,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-28 02:10:15,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=3564, Unknown=0, NotChecked=0, Total=3906 [2024-11-28 02:10:15,688 INFO L87 Difference]: Start difference. First operand 744 states and 918 transitions. Second operand has 63 states, 62 states have (on average 2.370967741935484) internal successors, (147), 63 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:10:23,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:10:23,142 INFO L93 Difference]: Finished difference Result 796 states and 952 transitions. [2024-11-28 02:10:23,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-28 02:10:23,142 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.370967741935484) internal successors, (147), 63 states have internal predecessors, (147), 0 states have call successors, (0), 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 78 [2024-11-28 02:10:23,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:10:23,144 INFO L225 Difference]: With dead ends: 796 [2024-11-28 02:10:23,144 INFO L226 Difference]: Without dead ends: 796 [2024-11-28 02:10:23,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3218 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1614, Invalid=11726, Unknown=0, NotChecked=0, Total=13340 [2024-11-28 02:10:23,145 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 1435 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:10:23,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1435 Valid, 1318 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 02:10:23,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2024-11-28 02:10:23,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 744. [2024-11-28 02:10:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 741 states have (on average 1.2307692307692308) internal successors, (912), 743 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:10:23,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 912 transitions. [2024-11-28 02:10:23,156 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 912 transitions. Word has length 78 [2024-11-28 02:10:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:10:23,156 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 912 transitions. [2024-11-28 02:10:23,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.370967741935484) internal successors, (147), 63 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:10:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 912 transitions. [2024-11-28 02:10:23,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-28 02:10:23,158 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:10:23,158 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 02:10:23,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 02:10:23,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-28 02:10:23,359 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:10:23,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:10:23,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1404893741, now seen corresponding path program 4 times [2024-11-28 02:10:23,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:10:23,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119566664] [2024-11-28 02:10:23,359 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:10:23,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:10:23,390 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:10:23,391 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:10:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-28 02:10:23,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:10:23,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119566664] [2024-11-28 02:10:23,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119566664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:10:23,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797241436] [2024-11-28 02:10:23,810 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:10:23,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:10:23,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:10:23,814 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:10:23,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 02:10:24,063 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:10:24,063 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:10:24,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-28 02:10:24,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:10:24,150 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 02:10:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 62 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:10:24,544 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:10:24,697 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 20 treesize of output 12 [2024-11-28 02:10:24,818 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 02:10:24,821 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 02:10:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:10:24,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797241436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:10:24,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:10:24,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 19] total 31 [2024-11-28 02:10:24,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524076630] [2024-11-28 02:10:24,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:10:24,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 02:10:24,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:10:24,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 02:10:24,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2024-11-28 02:10:24,916 INFO L87 Difference]: Start difference. First operand 744 states and 912 transitions. Second operand has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:10:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:10:25,850 INFO L93 Difference]: Finished difference Result 1154 states and 1382 transitions. [2024-11-28 02:10:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:10:25,851 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 0 states have call successors, (0), 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 86 [2024-11-28 02:10:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:10:25,854 INFO L225 Difference]: With dead ends: 1154 [2024-11-28 02:10:25,854 INFO L226 Difference]: Without dead ends: 1139 [2024-11-28 02:10:25,854 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 02:10:25,855 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 64 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:10:25,855 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 2055 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:10:25,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2024-11-28 02:10:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 767. [2024-11-28 02:10:25,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 764 states have (on average 1.2264397905759161) internal successors, (937), 766 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:10:25,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 937 transitions. [2024-11-28 02:10:25,869 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 937 transitions. Word has length 86 [2024-11-28 02:10:25,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:10:25,869 INFO L471 AbstractCegarLoop]: Abstraction has 767 states and 937 transitions. [2024-11-28 02:10:25,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:10:25,870 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 937 transitions. [2024-11-28 02:10:25,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-28 02:10:25,871 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:10:25,872 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 4, 3, 3, 3, 3, 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 02:10:25,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 02:10:26,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-28 02:10:26,072 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:10:26,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:10:26,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1975351369, now seen corresponding path program 4 times [2024-11-28 02:10:26,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:10:26,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871873379] [2024-11-28 02:10:26,073 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:10:26,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:10:26,106 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:10:26,106 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:10:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-28 02:10:32,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:10:32,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871873379] [2024-11-28 02:10:32,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871873379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:10:32,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753188772] [2024-11-28 02:10:32,086 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:10:32,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:10:32,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:10:32,088 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:10:32,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 02:10:32,354 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:10:32,354 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:10:32,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-28 02:10:32,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:10:32,750 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 02:10:46,963 INFO L349 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2024-11-28 02:10:46,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 83 [2024-11-28 02:10:46,973 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 02:10:46,986 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-28 02:10:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 93 proven. 18 refuted. 1 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-28 02:10:47,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:10:54,408 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 104 treesize of output 90 [2024-11-28 02:10:54,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 134 [2024-11-28 02:10:54,426 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-28 02:10:55,453 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 49 treesize of output 41 [2024-11-28 02:10:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-28 02:10:55,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753188772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:10:55,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:10:55,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 38] total 107 [2024-11-28 02:10:55,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757865503] [2024-11-28 02:10:55,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:10:55,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-11-28 02:10:55,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:10:55,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-11-28 02:10:55,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=10678, Unknown=2, NotChecked=0, Total=11556 [2024-11-28 02:10:55,668 INFO L87 Difference]: Start difference. First operand 767 states and 937 transitions. Second operand has 108 states, 107 states have (on average 1.8224299065420562) internal successors, (195), 108 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:11:03,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:11:03,134 INFO L93 Difference]: Finished difference Result 867 states and 1039 transitions. [2024-11-28 02:11:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-28 02:11:03,135 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 1.8224299065420562) internal successors, (195), 108 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2024-11-28 02:11:03,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:11:03,137 INFO L225 Difference]: With dead ends: 867 [2024-11-28 02:11:03,137 INFO L226 Difference]: Without dead ends: 697 [2024-11-28 02:11:03,138 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4451 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1944, Invalid=14566, Unknown=2, NotChecked=0, Total=16512 [2024-11-28 02:11:03,138 INFO L435 NwaCegarLoop]: 124 mSDtfsCounter, 459 mSDsluCounter, 3999 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 4123 SdHoareTripleChecker+Invalid, 4481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:11:03,138 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 4123 Invalid, 4481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-28 02:11:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2024-11-28 02:11:03,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 482. [2024-11-28 02:11:03,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 479 states have (on average 1.2254697286012526) internal successors, (587), 481 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:11:03,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 587 transitions. [2024-11-28 02:11:03,163 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 587 transitions. Word has length 89 [2024-11-28 02:11:03,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:11:03,163 INFO L471 AbstractCegarLoop]: Abstraction has 482 states and 587 transitions. [2024-11-28 02:11:03,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 1.8224299065420562) internal successors, (195), 108 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:11:03,164 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 587 transitions. [2024-11-28 02:11:03,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-28 02:11:03,165 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:11:03,166 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 02:11:03,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 02:11:03,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-11-28 02:11:03,366 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:11:03,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:11:03,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1146777062, now seen corresponding path program 5 times [2024-11-28 02:11:03,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:11:03,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76321114] [2024-11-28 02:11:03,367 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:11:03,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:11:03,414 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-28 02:11:03,414 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:11:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-28 02:11:03,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:11:03,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76321114] [2024-11-28 02:11:03,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76321114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:11:03,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75551877] [2024-11-28 02:11:03,635 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:11:03,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:11:03,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:11:03,637 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:11:03,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 02:11:03,885 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-28 02:11:03,885 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:11:03,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-28 02:11:03,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:11:04,192 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 02:11:04,227 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 8 treesize of output 1 [2024-11-28 02:11:04,810 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 02:11:04,910 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 16 treesize of output 8 [2024-11-28 02:11:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-28 02:11:04,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:11:05,565 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 14 [2024-11-28 02:11:05,609 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 02:11:05,611 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 02:11:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-28 02:11:05,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75551877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:11:05,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:11:05,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 22] total 51 [2024-11-28 02:11:05,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721230102] [2024-11-28 02:11:05,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:11:05,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-28 02:11:05,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:11:05,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-28 02:11:05,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2406, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 02:11:05,900 INFO L87 Difference]: Start difference. First operand 482 states and 587 transitions. Second operand has 51 states, 51 states have (on average 3.6666666666666665) internal successors, (187), 51 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:11:08,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:11:08,785 INFO L93 Difference]: Finished difference Result 717 states and 860 transitions. [2024-11-28 02:11:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-28 02:11:08,786 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6666666666666665) internal successors, (187), 51 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2024-11-28 02:11:08,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:11:08,787 INFO L225 Difference]: With dead ends: 717 [2024-11-28 02:11:08,787 INFO L226 Difference]: Without dead ends: 631 [2024-11-28 02:11:08,788 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=371, Invalid=5791, Unknown=0, NotChecked=0, Total=6162 [2024-11-28 02:11:08,788 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 157 mSDsluCounter, 3069 mSDsCounter, 0 mSdLazyCounter, 2242 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 3174 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:11:08,788 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 3174 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2242 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 02:11:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2024-11-28 02:11:08,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 569. [2024-11-28 02:11:08,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 566 states have (on average 1.2579505300353357) internal successors, (712), 568 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:11:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 712 transitions. [2024-11-28 02:11:08,796 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 712 transitions. Word has length 90 [2024-11-28 02:11:08,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:11:08,796 INFO L471 AbstractCegarLoop]: Abstraction has 569 states and 712 transitions. [2024-11-28 02:11:08,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6666666666666665) internal successors, (187), 51 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:11:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 712 transitions. [2024-11-28 02:11:08,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-28 02:11:08,798 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:11:08,798 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1] [2024-11-28 02:11:08,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 02:11:09,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:11:09,003 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:11:09,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:11:09,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1019743727, now seen corresponding path program 4 times [2024-11-28 02:11:09,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:11:09,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900555754] [2024-11-28 02:11:09,003 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:11:09,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:11:09,046 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:11:09,047 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:11:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-28 02:11:13,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:11:13,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900555754] [2024-11-28 02:11:13,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900555754] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:11:13,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324303274] [2024-11-28 02:11:13,654 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:11:13,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:11:13,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:11:13,656 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:11:13,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 02:11:13,906 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:11:13,906 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:11:13,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 156 conjuncts are in the unsatisfiable core [2024-11-28 02:11:13,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:11:14,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 02:11:14,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 02:11:14,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 02:11:14,722 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 02:11:14,824 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 21 treesize of output 1 [2024-11-28 02:11:21,039 INFO L349 Elim1Store]: treesize reduction 20, result has 70.1 percent of original size [2024-11-28 02:11:21,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 73 [2024-11-28 02:11:21,045 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 02:11:21,384 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 16 treesize of output 8 [2024-11-28 02:11:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 02:11:21,542 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:11:27,911 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 102 treesize of output 90 [2024-11-28 02:11:27,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 146 [2024-11-28 02:11:27,924 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 02:12:04,662 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 30 treesize of output 28 [2024-11-28 02:12:04,670 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 1686 treesize of output 1654 [2024-11-28 02:12:05,554 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 02:12:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 5 proven. 81 refuted. 1 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-28 02:12:05,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324303274] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:12:05,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:12:05,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 42, 42] total 112 [2024-11-28 02:12:05,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137975123] [2024-11-28 02:12:05,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:12:05,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-11-28 02:12:05,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:12:05,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-11-28 02:12:05,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=11864, Unknown=7, NotChecked=0, Total=12656 [2024-11-28 02:12:05,580 INFO L87 Difference]: Start difference. First operand 569 states and 712 transitions. Second operand has 113 states, 112 states have (on average 1.875) internal successors, (210), 113 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 02:12:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:12:17,540 INFO L93 Difference]: Finished difference Result 687 states and 834 transitions. [2024-11-28 02:12:17,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-28 02:12:17,540 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 1.875) internal successors, (210), 113 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) Word has length 93 [2024-11-28 02:12:17,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:12:17,541 INFO L225 Difference]: With dead ends: 687 [2024-11-28 02:12:17,542 INFO L226 Difference]: Without dead ends: 512 [2024-11-28 02:12:17,542 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6329 ImplicationChecksByTransitivity, 55.8s TimeCoverageRelationStatistics Valid=2481, Invalid=20162, Unknown=7, NotChecked=0, Total=22650 [2024-11-28 02:12:17,543 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 1090 mSDsluCounter, 3115 mSDsCounter, 0 mSdLazyCounter, 5224 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 3200 SdHoareTripleChecker+Invalid, 5233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 5224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:12:17,543 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1090 Valid, 3200 Invalid, 5233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 5224 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-11-28 02:12:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2024-11-28 02:12:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 276. [2024-11-28 02:12:17,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 273 states have (on average 1.2527472527472527) internal successors, (342), 275 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:12:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 342 transitions. [2024-11-28 02:12:17,549 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 342 transitions. Word has length 93 [2024-11-28 02:12:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:12:17,549 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 342 transitions. [2024-11-28 02:12:17,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 1.875) internal successors, (210), 113 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 02:12:17,549 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 342 transitions. [2024-11-28 02:12:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-28 02:12:17,550 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:12:17,550 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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 02:12:17,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-28 02:12:17,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-28 02:12:17,751 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:12:17,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:12:17,751 INFO L85 PathProgramCache]: Analyzing trace with hash -822433802, now seen corresponding path program 6 times [2024-11-28 02:12:17,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:12:17,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257450796] [2024-11-28 02:12:17,752 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:12:17,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:12:17,813 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 02:12:17,813 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:12:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-28 02:12:18,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:12:18,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257450796] [2024-11-28 02:12:18,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257450796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:12:18,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475338129] [2024-11-28 02:12:18,681 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:12:18,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:12:18,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:12:18,684 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:12:18,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 02:12:18,995 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 02:12:18,995 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:12:18,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-28 02:12:19,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:12:19,233 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 02:12:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 11 proven. 60 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-28 02:12:19,462 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:12:19,488 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 02:12:19,490 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 02:12:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 11 proven. 60 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-28 02:12:19,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475338129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:12:19,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:12:19,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 36 [2024-11-28 02:12:19,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44249123] [2024-11-28 02:12:19,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:12:19,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 02:12:19,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:12:19,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 02:12:19,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1162, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 02:12:19,596 INFO L87 Difference]: Start difference. First operand 276 states and 342 transitions. Second operand has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:12:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:12:20,777 INFO L93 Difference]: Finished difference Result 399 states and 491 transitions. [2024-11-28 02:12:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 02:12:20,777 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2024-11-28 02:12:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:12:20,779 INFO L225 Difference]: With dead ends: 399 [2024-11-28 02:12:20,779 INFO L226 Difference]: Without dead ends: 399 [2024-11-28 02:12:20,779 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=271, Invalid=2809, Unknown=0, NotChecked=0, Total=3080 [2024-11-28 02:12:20,780 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 132 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:12:20,780 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1151 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 02:12:20,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-11-28 02:12:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 298. [2024-11-28 02:12:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 295 states have (on average 1.2372881355932204) internal successors, (365), 297 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:12:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 365 transitions. [2024-11-28 02:12:20,784 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 365 transitions. Word has length 97 [2024-11-28 02:12:20,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:12:20,785 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 365 transitions. [2024-11-28 02:12:20,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:12:20,785 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 365 transitions. [2024-11-28 02:12:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-28 02:12:20,786 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:12:20,786 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1] [2024-11-28 02:12:20,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-28 02:12:20,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:12:20,987 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:12:20,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:12:20,987 INFO L85 PathProgramCache]: Analyzing trace with hash 701396023, now seen corresponding path program 5 times [2024-11-28 02:12:20,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:12:20,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854434861] [2024-11-28 02:12:20,987 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:12:20,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:12:21,019 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-28 02:12:21,020 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:12:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-28 02:12:22,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:12:22,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854434861] [2024-11-28 02:12:22,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854434861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:12:22,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235349952] [2024-11-28 02:12:22,132 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:12:22,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:12:22,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:12:22,134 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:12:22,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 02:12:22,416 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-28 02:12:22,416 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:12:22,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-28 02:12:22,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:12:22,903 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 02:12:22,973 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 8 treesize of output 1 [2024-11-28 02:12:23,701 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 02:12:23,849 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 16 treesize of output 8 [2024-11-28 02:12:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-28 02:12:23,902 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:12:24,766 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 14 [2024-11-28 02:12:24,833 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 02:12:24,834 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 02:12:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-28 02:12:25,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235349952] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:12:25,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:12:25,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 22] total 59 [2024-11-28 02:12:25,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190439379] [2024-11-28 02:12:25,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:12:25,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-28 02:12:25,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:12:25,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-28 02:12:25,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3262, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 02:12:25,310 INFO L87 Difference]: Start difference. First operand 298 states and 365 transitions. Second operand has 59 states, 59 states have (on average 3.457627118644068) internal successors, (204), 59 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:12:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:12:28,749 INFO L93 Difference]: Finished difference Result 579 states and 696 transitions. [2024-11-28 02:12:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 02:12:28,750 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.457627118644068) internal successors, (204), 59 states have internal predecessors, (204), 0 states have call successors, (0), 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 97 [2024-11-28 02:12:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:12:28,751 INFO L225 Difference]: With dead ends: 579 [2024-11-28 02:12:28,751 INFO L226 Difference]: Without dead ends: 579 [2024-11-28 02:12:28,752 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=373, Invalid=6599, Unknown=0, NotChecked=0, Total=6972 [2024-11-28 02:12:28,752 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 194 mSDsluCounter, 2632 mSDsCounter, 0 mSdLazyCounter, 2416 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 2703 SdHoareTripleChecker+Invalid, 2427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:12:28,752 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 2703 Invalid, 2427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2416 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 02:12:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2024-11-28 02:12:28,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 553. [2024-11-28 02:12:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 550 states have (on average 1.229090909090909) internal successors, (676), 552 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:12:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 676 transitions. [2024-11-28 02:12:28,761 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 676 transitions. Word has length 97 [2024-11-28 02:12:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:12:28,762 INFO L471 AbstractCegarLoop]: Abstraction has 553 states and 676 transitions. [2024-11-28 02:12:28,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.457627118644068) internal successors, (204), 59 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:12:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 676 transitions. [2024-11-28 02:12:28,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-28 02:12:28,764 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:12:28,764 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 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, 1, 1, 1, 1, 1] [2024-11-28 02:12:28,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 02:12:28,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:12:28,964 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:12:28,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:12:28,965 INFO L85 PathProgramCache]: Analyzing trace with hash -150649442, now seen corresponding path program 6 times [2024-11-28 02:12:28,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:12:28,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559332473] [2024-11-28 02:12:28,965 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:12:28,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:12:29,024 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 02:12:29,024 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:12:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-28 02:12:29,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:12:29,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559332473] [2024-11-28 02:12:29,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559332473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:12:29,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855380133] [2024-11-28 02:12:29,990 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:12:29,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:12:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:12:29,992 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:12:29,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 02:12:30,338 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 02:12:30,338 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:12:30,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-28 02:12:30,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:12:30,778 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 02:12:30,841 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 8 treesize of output 1 [2024-11-28 02:12:32,629 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 16 treesize of output 8 [2024-11-28 02:12:33,076 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-28 02:12:33,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-28 02:12:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 02:12:33,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:12:35,328 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 14 [2024-11-28 02:12:35,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-28 02:12:35,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2024-11-28 02:12:35,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2024-11-28 02:12:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 02:12:36,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855380133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:12:36,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:12:36,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 27, 25] total 64 [2024-11-28 02:12:36,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467702391] [2024-11-28 02:12:36,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:12:36,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-28 02:12:36,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:12:36,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-28 02:12:36,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3878, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 02:12:36,165 INFO L87 Difference]: Start difference. First operand 553 states and 676 transitions. Second operand has 65 states, 64 states have (on average 3.234375) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:12:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:12:46,011 INFO L93 Difference]: Finished difference Result 839 states and 1003 transitions. [2024-11-28 02:12:46,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-28 02:12:46,011 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.234375) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2024-11-28 02:12:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:12:46,013 INFO L225 Difference]: With dead ends: 839 [2024-11-28 02:12:46,013 INFO L226 Difference]: Without dead ends: 494 [2024-11-28 02:12:46,013 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6000 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=1971, Invalid=18909, Unknown=0, NotChecked=0, Total=20880 [2024-11-28 02:12:46,014 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 748 mSDsluCounter, 2358 mSDsCounter, 0 mSdLazyCounter, 3241 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:12:46,014 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 2428 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3241 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-28 02:12:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2024-11-28 02:12:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 267. [2024-11-28 02:12:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 265 states have (on average 1.1886792452830188) internal successors, (315), 266 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:12:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 315 transitions. [2024-11-28 02:12:46,018 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 315 transitions. Word has length 101 [2024-11-28 02:12:46,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:12:46,018 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 315 transitions. [2024-11-28 02:12:46,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.234375) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:12:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 315 transitions. [2024-11-28 02:12:46,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-28 02:12:46,019 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:12:46,019 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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 02:12:46,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 02:12:46,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:12:46,220 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:12:46,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:12:46,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2028292894, now seen corresponding path program 2 times [2024-11-28 02:12:46,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:12:46,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817433194] [2024-11-28 02:12:46,220 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:12:46,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:12:46,251 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:12:46,251 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:12:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-28 02:12:46,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:12:46,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817433194] [2024-11-28 02:12:46,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817433194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:12:46,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833917649] [2024-11-28 02:12:46,947 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:12:46,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:12:46,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:12:46,949 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:12:46,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 02:12:47,218 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:12:47,218 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:12:47,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-28 02:12:47,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:12:47,231 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 02:12:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-28 02:12:47,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:12:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-28 02:12:48,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833917649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:12:48,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:12:48,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 45 [2024-11-28 02:12:48,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484163686] [2024-11-28 02:12:48,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:12:48,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-28 02:12:48,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:12:48,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-28 02:12:48,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 02:12:48,779 INFO L87 Difference]: Start difference. First operand 267 states and 315 transitions. Second operand has 46 states, 45 states have (on average 5.088888888888889) internal successors, (229), 46 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 02:12:49,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:12:49,984 INFO L93 Difference]: Finished difference Result 355 states and 418 transitions. [2024-11-28 02:12:49,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 02:12:49,985 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 5.088888888888889) internal successors, (229), 46 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) Word has length 103 [2024-11-28 02:12:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:12:49,987 INFO L225 Difference]: With dead ends: 355 [2024-11-28 02:12:49,987 INFO L226 Difference]: Without dead ends: 355 [2024-11-28 02:12:49,987 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=495, Invalid=3665, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 02:12:49,987 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 219 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:12:49,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1241 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:12:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2024-11-28 02:12:49,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 306. [2024-11-28 02:12:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 304 states have (on average 1.2138157894736843) internal successors, (369), 305 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:12:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 369 transitions. [2024-11-28 02:12:49,990 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 369 transitions. Word has length 103 [2024-11-28 02:12:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:12:49,991 INFO L471 AbstractCegarLoop]: Abstraction has 306 states and 369 transitions. [2024-11-28 02:12:49,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 5.088888888888889) internal successors, (229), 46 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 02:12:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 369 transitions. [2024-11-28 02:12:49,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-28 02:12:49,992 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:12:49,992 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1] [2024-11-28 02:12:50,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-28 02:12:50,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-28 02:12:50,192 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:12:50,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:12:50,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1592884896, now seen corresponding path program 2 times [2024-11-28 02:12:50,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:12:50,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288950927] [2024-11-28 02:12:50,193 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:12:50,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:12:50,209 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:12:50,209 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:12:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 02:12:50,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:12:50,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288950927] [2024-11-28 02:12:50,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288950927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:12:50,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:12:50,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:12:50,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136429089] [2024-11-28 02:12:50,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:12:50,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:12:50,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:12:50,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:12:50,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:12:50,257 INFO L87 Difference]: Start difference. First operand 306 states and 369 transitions. Second operand has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 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 02:12:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:12:50,304 INFO L93 Difference]: Finished difference Result 308 states and 369 transitions. [2024-11-28 02:12:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:12:50,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 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 107 [2024-11-28 02:12:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:12:50,306 INFO L225 Difference]: With dead ends: 308 [2024-11-28 02:12:50,306 INFO L226 Difference]: Without dead ends: 308 [2024-11-28 02:12:50,306 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:12:50,306 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 8 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:12:50,307 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 169 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:12:50,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-28 02:12:50,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 296. [2024-11-28 02:12:50,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.2101694915254237) internal successors, (357), 295 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:12:50,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 357 transitions. [2024-11-28 02:12:50,311 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 357 transitions. Word has length 107 [2024-11-28 02:12:50,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:12:50,311 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 357 transitions. [2024-11-28 02:12:50,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 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 02:12:50,312 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 357 transitions. [2024-11-28 02:12:50,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-28 02:12:50,313 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:12:50,313 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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 02:12:50,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-11-28 02:12:50,313 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:12:50,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:12:50,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1997355106, now seen corresponding path program 3 times [2024-11-28 02:12:50,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:12:50,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892480050] [2024-11-28 02:12:50,314 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:12:50,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:12:50,366 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 02:12:50,367 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:12:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 40 proven. 68 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-11-28 02:12:50,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:12:50,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892480050] [2024-11-28 02:12:50,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892480050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:12:50,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365401458] [2024-11-28 02:12:50,816 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:12:50,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:12:50,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:12:50,819 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:12:50,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 02:12:51,180 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 02:12:51,180 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:12:51,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-28 02:12:51,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:12:51,561 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 02:12:51,598 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 8 treesize of output 1 [2024-11-28 02:12:52,408 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 02:12:52,503 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 16 treesize of output 8 [2024-11-28 02:12:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 51 proven. 66 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-28 02:12:52,544 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:12:53,436 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 22 treesize of output 14 [2024-11-28 02:12:53,488 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 02:12:53,494 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 02:12:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 67 proven. 50 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-28 02:12:53,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365401458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:12:53,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:12:53,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25, 26] total 62 [2024-11-28 02:12:53,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884771645] [2024-11-28 02:12:53,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:12:53,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-28 02:12:53,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:12:53,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-28 02:12:53,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3608, Unknown=0, NotChecked=0, Total=3782 [2024-11-28 02:12:53,889 INFO L87 Difference]: Start difference. First operand 296 states and 357 transitions. Second operand has 62 states, 62 states have (on average 3.629032258064516) internal successors, (225), 62 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:12:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:12:57,631 INFO L93 Difference]: Finished difference Result 485 states and 570 transitions. [2024-11-28 02:12:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-28 02:12:57,632 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.629032258064516) internal successors, (225), 62 states have internal predecessors, (225), 0 states have call successors, (0), 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 02:12:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:12:57,632 INFO L225 Difference]: With dead ends: 485 [2024-11-28 02:12:57,633 INFO L226 Difference]: Without dead ends: 293 [2024-11-28 02:12:57,633 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=506, Invalid=9796, Unknown=0, NotChecked=0, Total=10302 [2024-11-28 02:12:57,633 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 296 mSDsluCounter, 2756 mSDsCounter, 0 mSdLazyCounter, 3061 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 3067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:12:57,633 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2829 Invalid, 3067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3061 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 02:12:57,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-11-28 02:12:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 282. [2024-11-28 02:12:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.1850533807829182) internal successors, (333), 281 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 02:12:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 333 transitions. [2024-11-28 02:12:57,636 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 333 transitions. Word has length 117 [2024-11-28 02:12:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:12:57,637 INFO L471 AbstractCegarLoop]: Abstraction has 282 states and 333 transitions. [2024-11-28 02:12:57,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.629032258064516) internal successors, (225), 62 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:12:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 333 transitions. [2024-11-28 02:12:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-28 02:12:57,638 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:12:57,638 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:12:57,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 02:12:57,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-28 02:12:57,838 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:12:57,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:12:57,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1849161906, now seen corresponding path program 4 times [2024-11-28 02:12:57,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:12:57,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364766234] [2024-11-28 02:12:57,839 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:12:57,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:12:57,869 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:12:57,869 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:12:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 22 proven. 103 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-11-28 02:12:58,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:12:58,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364766234] [2024-11-28 02:12:58,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364766234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:12:58,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718288391] [2024-11-28 02:12:58,547 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:12:58,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:12:58,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:12:58,550 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:12:58,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 02:12:58,855 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:12:58,855 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:12:58,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-28 02:12:58,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:12:59,105 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 02:12:59,402 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 02:12:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 14 proven. 92 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-28 02:12:59,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:12:59,641 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 02:12:59,645 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 02:12:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 14 proven. 92 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-28 02:12:59,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718288391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:12:59,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:12:59,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 43 [2024-11-28 02:12:59,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984499682] [2024-11-28 02:12:59,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:12:59,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-28 02:12:59,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:12:59,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-28 02:12:59,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 02:12:59,782 INFO L87 Difference]: Start difference. First operand 282 states and 333 transitions. Second operand has 43 states, 43 states have (on average 4.069767441860465) internal successors, (175), 43 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:02,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:13:02,007 INFO L93 Difference]: Finished difference Result 406 states and 463 transitions. [2024-11-28 02:13:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 02:13:02,008 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.069767441860465) internal successors, (175), 43 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2024-11-28 02:13:02,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:13:02,009 INFO L225 Difference]: With dead ends: 406 [2024-11-28 02:13:02,009 INFO L226 Difference]: Without dead ends: 364 [2024-11-28 02:13:02,009 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=247, Invalid=3785, Unknown=0, NotChecked=0, Total=4032 [2024-11-28 02:13:02,009 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 158 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:13:02,010 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 2200 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2328 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 02:13:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-28 02:13:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 304. [2024-11-28 02:13:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.1914191419141915) internal successors, (361), 303 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 361 transitions. [2024-11-28 02:13:02,013 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 361 transitions. Word has length 124 [2024-11-28 02:13:02,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:13:02,014 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 361 transitions. [2024-11-28 02:13:02,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.069767441860465) internal successors, (175), 43 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:02,014 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 361 transitions. [2024-11-28 02:13:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-28 02:13:02,015 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:13:02,015 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:13:02,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-28 02:13:02,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-28 02:13:02,215 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:13:02,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:13:02,216 INFO L85 PathProgramCache]: Analyzing trace with hash 232023661, now seen corresponding path program 5 times [2024-11-28 02:13:02,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:13:02,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611805185] [2024-11-28 02:13:02,216 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:13:02,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:13:02,292 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 02:13:02,292 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:13:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 92 proven. 68 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-11-28 02:13:03,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:13:03,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611805185] [2024-11-28 02:13:03,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611805185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:13:03,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627502415] [2024-11-28 02:13:03,256 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:13:03,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:13:03,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:13:03,260 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:13:03,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 02:13:03,895 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 02:13:03,895 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:13:03,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 202 conjuncts are in the unsatisfiable core [2024-11-28 02:13:03,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:13:04,365 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 8 treesize of output 1 [2024-11-28 02:13:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 23 proven. 230 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 02:13:05,951 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:13:06,206 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 20 treesize of output 12 [2024-11-28 02:13:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 23 proven. 140 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-28 02:13:07,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627502415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:13:07,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:13:07,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35, 21] total 71 [2024-11-28 02:13:07,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400093713] [2024-11-28 02:13:07,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:13:07,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-28 02:13:07,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:13:07,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-28 02:13:07,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4758, Unknown=0, NotChecked=0, Total=4970 [2024-11-28 02:13:07,296 INFO L87 Difference]: Start difference. First operand 304 states and 361 transitions. Second operand has 71 states, 71 states have (on average 3.8309859154929575) internal successors, (272), 71 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:13:13,913 INFO L93 Difference]: Finished difference Result 649 states and 761 transitions. [2024-11-28 02:13:13,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-11-28 02:13:13,914 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.8309859154929575) internal successors, (272), 71 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2024-11-28 02:13:13,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:13:13,916 INFO L225 Difference]: With dead ends: 649 [2024-11-28 02:13:13,916 INFO L226 Difference]: Without dead ends: 314 [2024-11-28 02:13:13,917 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4645 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1502, Invalid=18238, Unknown=0, NotChecked=0, Total=19740 [2024-11-28 02:13:13,917 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 1123 mSDsluCounter, 3113 mSDsCounter, 0 mSdLazyCounter, 4617 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 3183 SdHoareTripleChecker+Invalid, 4621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 4617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:13:13,917 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 3183 Invalid, 4621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 4617 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 02:13:13,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2024-11-28 02:13:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 310. [2024-11-28 02:13:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.1877022653721683) internal successors, (367), 309 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 367 transitions. [2024-11-28 02:13:13,921 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 367 transitions. Word has length 135 [2024-11-28 02:13:13,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:13:13,922 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 367 transitions. [2024-11-28 02:13:13,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.8309859154929575) internal successors, (272), 71 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 367 transitions. [2024-11-28 02:13:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-28 02:13:13,922 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:13:13,923 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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 02:13:13,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 02:13:14,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:13:14,123 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:13:14,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:13:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash 238887980, now seen corresponding path program 6 times [2024-11-28 02:13:14,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:13:14,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307353892] [2024-11-28 02:13:14,124 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:13:14,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:13:14,221 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 02:13:14,221 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:13:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 57 proven. 91 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-28 02:13:15,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:13:15,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307353892] [2024-11-28 02:13:15,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307353892] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:13:15,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033832199] [2024-11-28 02:13:15,510 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:13:15,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:13:15,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:13:15,512 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:13:15,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 02:13:16,185 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 02:13:16,185 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:13:16,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-28 02:13:16,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:13:16,198 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 02:13:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 51 proven. 129 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-28 02:13:16,856 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:13:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 57 proven. 123 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-28 02:13:18,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033832199] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:13:18,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:13:18,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 18] total 58 [2024-11-28 02:13:18,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203540696] [2024-11-28 02:13:18,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:13:18,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-28 02:13:18,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:13:18,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-28 02:13:18,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=2978, Unknown=0, NotChecked=0, Total=3306 [2024-11-28 02:13:18,044 INFO L87 Difference]: Start difference. First operand 310 states and 367 transitions. Second operand has 58 states, 58 states have (on average 4.396551724137931) internal successors, (255), 58 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:19,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:13:19,821 INFO L93 Difference]: Finished difference Result 452 states and 515 transitions. [2024-11-28 02:13:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-28 02:13:19,822 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.396551724137931) internal successors, (255), 58 states have internal predecessors, (255), 0 states have call successors, (0), 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 138 [2024-11-28 02:13:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:13:19,823 INFO L225 Difference]: With dead ends: 452 [2024-11-28 02:13:19,823 INFO L226 Difference]: Without dead ends: 400 [2024-11-28 02:13:19,823 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2302 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=840, Invalid=6132, Unknown=0, NotChecked=0, Total=6972 [2024-11-28 02:13:19,824 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 259 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:13:19,824 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 829 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:13:19,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2024-11-28 02:13:19,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 332. [2024-11-28 02:13:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.1933534743202416) internal successors, (395), 331 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 395 transitions. [2024-11-28 02:13:19,829 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 395 transitions. Word has length 138 [2024-11-28 02:13:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:13:19,829 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 395 transitions. [2024-11-28 02:13:19,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.396551724137931) internal successors, (255), 58 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:19,829 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 395 transitions. [2024-11-28 02:13:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-28 02:13:19,830 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:13:19,830 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 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 02:13:19,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-28 02:13:20,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:13:20,031 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:13:20,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:13:20,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1991122291, now seen corresponding path program 7 times [2024-11-28 02:13:20,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:13:20,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145558467] [2024-11-28 02:13:20,031 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:13:20,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:13:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:13:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 168 proven. 45 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2024-11-28 02:13:21,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:13:21,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145558467] [2024-11-28 02:13:21,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145558467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:13:21,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627499653] [2024-11-28 02:13:21,563 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:13:21,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:13:21,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:13:21,566 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:13:21,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 02:13:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:13:21,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 190 conjuncts are in the unsatisfiable core [2024-11-28 02:13:21,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:13:21,947 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 8 treesize of output 1 [2024-11-28 02:13:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 27 proven. 198 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-11-28 02:13:23,044 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:13:23,215 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 20 treesize of output 12 [2024-11-28 02:13:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 27 proven. 198 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-11-28 02:13:23,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627499653] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:13:23,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:13:23,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 54 [2024-11-28 02:13:23,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901133677] [2024-11-28 02:13:23,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:13:23,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-28 02:13:23,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:13:23,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-28 02:13:23,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 02:13:23,915 INFO L87 Difference]: Start difference. First operand 332 states and 395 transitions. Second operand has 54 states, 54 states have (on average 4.2407407407407405) internal successors, (229), 54 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 02:13:28,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:13:28,138 INFO L93 Difference]: Finished difference Result 732 states and 860 transitions. [2024-11-28 02:13:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-28 02:13:28,139 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.2407407407407405) internal successors, (229), 54 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) Word has length 149 [2024-11-28 02:13:28,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:13:28,140 INFO L225 Difference]: With dead ends: 732 [2024-11-28 02:13:28,140 INFO L226 Difference]: Without dead ends: 168 [2024-11-28 02:13:28,141 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=755, Invalid=9547, Unknown=0, NotChecked=0, Total=10302 [2024-11-28 02:13:28,141 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 307 mSDsluCounter, 3077 mSDsCounter, 0 mSdLazyCounter, 3356 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 3161 SdHoareTripleChecker+Invalid, 3370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:13:28,141 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 3161 Invalid, 3370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3356 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 02:13:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-28 02:13:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2024-11-28 02:13:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.165644171779141) internal successors, (190), 163 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2024-11-28 02:13:28,145 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 149 [2024-11-28 02:13:28,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:13:28,145 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2024-11-28 02:13:28,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.2407407407407405) internal successors, (229), 54 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 02:13:28,145 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2024-11-28 02:13:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-28 02:13:28,146 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:13:28,146 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 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 02:13:28,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-28 02:13:28,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:13:28,347 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:13:28,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:13:28,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1414332291, now seen corresponding path program 8 times [2024-11-28 02:13:28,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:13:28,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922876833] [2024-11-28 02:13:28,348 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:13:28,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:13:28,400 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:13:28,400 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:13:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 51 proven. 194 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-11-28 02:13:29,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:13:29,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922876833] [2024-11-28 02:13:29,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922876833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:13:29,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97578310] [2024-11-28 02:13:29,621 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:13:29,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:13:29,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:13:29,623 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:13:29,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-28 02:13:30,020 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:13:30,021 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:13:30,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-28 02:13:30,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:13:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 70 proven. 175 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-11-28 02:13:30,920 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:13:31,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:13:31,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2024-11-28 02:13:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 70 proven. 175 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-11-28 02:13:32,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97578310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:13:32,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:13:32,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 52 [2024-11-28 02:13:32,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065932539] [2024-11-28 02:13:32,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:13:32,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-28 02:13:32,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:13:32,364 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-28 02:13:32,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2427, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 02:13:32,364 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand has 53 states, 52 states have (on average 4.884615384615385) internal successors, (254), 53 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:34,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:13:34,334 INFO L93 Difference]: Finished difference Result 202 states and 231 transitions. [2024-11-28 02:13:34,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 02:13:34,335 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.884615384615385) internal successors, (254), 53 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2024-11-28 02:13:34,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:13:34,335 INFO L225 Difference]: With dead ends: 202 [2024-11-28 02:13:34,336 INFO L226 Difference]: Without dead ends: 202 [2024-11-28 02:13:34,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=567, Invalid=4689, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 02:13:34,336 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 327 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1906 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:13:34,336 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 1906 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 02:13:34,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-28 02:13:34,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 171. [2024-11-28 02:13:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1764705882352942) internal successors, (200), 170 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:34,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2024-11-28 02:13:34,340 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 156 [2024-11-28 02:13:34,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:13:34,340 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2024-11-28 02:13:34,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.884615384615385) internal successors, (254), 53 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2024-11-28 02:13:34,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-11-28 02:13:34,341 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:13:34,341 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 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 02:13:34,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-28 02:13:34,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:13:34,542 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:13:34,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:13:34,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1212543141, now seen corresponding path program 9 times [2024-11-28 02:13:34,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:13:34,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314485723] [2024-11-28 02:13:34,542 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:13:34,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:13:34,649 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-28 02:13:34,649 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:13:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 70 proven. 224 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-11-28 02:13:35,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:13:35,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314485723] [2024-11-28 02:13:35,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314485723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:13:35,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839092187] [2024-11-28 02:13:35,195 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:13:35,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:13:35,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:13:35,199 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:13:35,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-28 02:13:35,978 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-28 02:13:35,978 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:13:35,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-11-28 02:13:35,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:13:36,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 02:13:36,711 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 8 treesize of output 1 [2024-11-28 02:13:38,573 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 16 treesize of output 8 [2024-11-28 02:13:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 123 proven. 192 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-28 02:13:38,643 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:13:40,468 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 14 [2024-11-28 02:13:40,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 02:13:40,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 02:13:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 165 proven. 150 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-28 02:13:41,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839092187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:13:41,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:13:41,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 33, 34] total 83 [2024-11-28 02:13:41,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292238135] [2024-11-28 02:13:41,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:13:41,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-28 02:13:41,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:13:41,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-28 02:13:41,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=6574, Unknown=0, NotChecked=0, Total=6806 [2024-11-28 02:13:41,192 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand has 83 states, 83 states have (on average 3.746987951807229) internal successors, (311), 83 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:13:48,678 INFO L93 Difference]: Finished difference Result 503 states and 585 transitions. [2024-11-28 02:13:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-28 02:13:48,679 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.746987951807229) internal successors, (311), 83 states have internal predecessors, (311), 0 states have call successors, (0), 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 163 [2024-11-28 02:13:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:13:48,680 INFO L225 Difference]: With dead ends: 503 [2024-11-28 02:13:48,680 INFO L226 Difference]: Without dead ends: 313 [2024-11-28 02:13:48,681 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3105 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=730, Invalid=19292, Unknown=0, NotChecked=0, Total=20022 [2024-11-28 02:13:48,681 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 510 mSDsluCounter, 5877 mSDsCounter, 0 mSdLazyCounter, 6423 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 5991 SdHoareTripleChecker+Invalid, 6431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 6423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:13:48,681 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 5991 Invalid, 6431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 6423 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-28 02:13:48,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-11-28 02:13:48,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 287. [2024-11-28 02:13:48,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.1643356643356644) internal successors, (333), 286 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 02:13:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 333 transitions. [2024-11-28 02:13:48,684 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 333 transitions. Word has length 163 [2024-11-28 02:13:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:13:48,684 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 333 transitions. [2024-11-28 02:13:48,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.746987951807229) internal successors, (311), 83 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:48,685 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 333 transitions. [2024-11-28 02:13:48,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-28 02:13:48,685 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:13:48,685 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 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 02:13:48,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-28 02:13:48,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:13:48,885 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:13:48,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:13:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1133275721, now seen corresponding path program 10 times [2024-11-28 02:13:48,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:13:48,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133057874] [2024-11-28 02:13:48,886 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:13:48,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:13:48,928 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:13:48,928 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:13:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 92 proven. 228 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-11-28 02:13:49,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:13:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133057874] [2024-11-28 02:13:49,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133057874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:13:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278364978] [2024-11-28 02:13:49,997 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:13:49,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:13:49,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:13:50,000 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:13:50,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-28 02:13:50,439 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:13:50,439 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:13:50,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 186 conjuncts are in the unsatisfiable core [2024-11-28 02:13:50,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:13:50,849 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 02:13:51,625 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 02:13:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 75 proven. 261 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-11-28 02:13:51,678 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:13:51,945 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 20 treesize of output 12 [2024-11-28 02:13:52,089 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 02:13:52,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 02:13:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 75 proven. 261 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-11-28 02:13:52,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278364978] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:13:52,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:13:52,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 27] total 55 [2024-11-28 02:13:52,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295055865] [2024-11-28 02:13:52,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:13:52,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-28 02:13:52,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:13:52,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-28 02:13:52,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2804, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 02:13:52,272 INFO L87 Difference]: Start difference. First operand 287 states and 333 transitions. Second operand has 55 states, 55 states have (on average 4.345454545454546) internal successors, (239), 55 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 02:13:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:13:56,740 INFO L93 Difference]: Finished difference Result 548 states and 636 transitions. [2024-11-28 02:13:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-28 02:13:56,741 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.345454545454546) internal successors, (239), 55 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 170 [2024-11-28 02:13:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:13:56,742 INFO L225 Difference]: With dead ends: 548 [2024-11-28 02:13:56,742 INFO L226 Difference]: Without dead ends: 345 [2024-11-28 02:13:56,742 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1778 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=562, Invalid=9140, Unknown=0, NotChecked=0, Total=9702 [2024-11-28 02:13:56,742 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 470 mSDsluCounter, 3631 mSDsCounter, 0 mSdLazyCounter, 4713 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 3736 SdHoareTripleChecker+Invalid, 4721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 4713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:13:56,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 3736 Invalid, 4721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 4713 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-28 02:13:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2024-11-28 02:13:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 302. [2024-11-28 02:13:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.1661129568106312) internal successors, (351), 301 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:13:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 351 transitions. [2024-11-28 02:13:56,746 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 351 transitions. Word has length 170 [2024-11-28 02:13:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:13:56,747 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 351 transitions. [2024-11-28 02:13:56,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.345454545454546) internal successors, (239), 55 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 02:13:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 351 transitions. [2024-11-28 02:13:56,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-11-28 02:13:56,748 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:13:56,748 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 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 02:13:56,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-28 02:13:56,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-11-28 02:13:56,949 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:13:56,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:13:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1853436536, now seen corresponding path program 11 times [2024-11-28 02:13:56,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:13:56,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510757074] [2024-11-28 02:13:56,949 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:13:56,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:13:57,051 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-28 02:13:57,051 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:13:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 154 proven. 222 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-28 02:13:58,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:13:58,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510757074] [2024-11-28 02:13:58,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510757074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:13:58,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512373117] [2024-11-28 02:13:58,661 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:13:58,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:13:58,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:13:58,663 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:13:58,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-28 02:13:59,301 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-28 02:13:59,302 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:13:59,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 269 conjuncts are in the unsatisfiable core [2024-11-28 02:13:59,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:00,177 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 8 treesize of output 1 [2024-11-28 02:14:00,181 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 8 treesize of output 1 [2024-11-28 02:14:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 35 proven. 497 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 02:14:03,225 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 35 proven. 344 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-28 02:14:07,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512373117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:14:07,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:14:07,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 47, 36] total 107 [2024-11-28 02:14:07,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758398527] [2024-11-28 02:14:07,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:14:07,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2024-11-28 02:14:07,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:07,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2024-11-28 02:14:07,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=11008, Unknown=0, NotChecked=0, Total=11342 [2024-11-28 02:14:07,008 INFO L87 Difference]: Start difference. First operand 302 states and 351 transitions. Second operand has 107 states, 107 states have (on average 3.457943925233645) internal successors, (370), 107 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:30,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:30,462 INFO L93 Difference]: Finished difference Result 890 states and 1050 transitions. [2024-11-28 02:14:30,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2024-11-28 02:14:30,462 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.457943925233645) internal successors, (370), 107 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2024-11-28 02:14:30,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:30,463 INFO L225 Difference]: With dead ends: 890 [2024-11-28 02:14:30,463 INFO L226 Difference]: Without dead ends: 318 [2024-11-28 02:14:30,466 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23230 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=5033, Invalid=77623, Unknown=0, NotChecked=0, Total=82656 [2024-11-28 02:14:30,466 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 2020 mSDsluCounter, 6786 mSDsCounter, 0 mSdLazyCounter, 12002 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2020 SdHoareTripleChecker+Valid, 6880 SdHoareTripleChecker+Invalid, 12032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 12002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:30,466 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2020 Valid, 6880 Invalid, 12032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 12002 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2024-11-28 02:14:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2024-11-28 02:14:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 308. [2024-11-28 02:14:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.1628664495114007) internal successors, (357), 307 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:30,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 357 transitions. [2024-11-28 02:14:30,471 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 357 transitions. Word has length 181 [2024-11-28 02:14:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:30,471 INFO L471 AbstractCegarLoop]: Abstraction has 308 states and 357 transitions. [2024-11-28 02:14:30,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.457943925233645) internal successors, (370), 107 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 357 transitions. [2024-11-28 02:14:30,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-28 02:14:30,473 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:30,473 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 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 02:14:30,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-28 02:14:30,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-28 02:14:30,674 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:14:30,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:30,674 INFO L85 PathProgramCache]: Analyzing trace with hash 206582607, now seen corresponding path program 12 times [2024-11-28 02:14:30,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:30,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536217686] [2024-11-28 02:14:30,675 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:14:30,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:30,842 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-28 02:14:30,842 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:14:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 92 proven. 313 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-28 02:14:32,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:32,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536217686] [2024-11-28 02:14:32,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536217686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:32,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404750628] [2024-11-28 02:14:32,393 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:14:32,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:32,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:32,395 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:32,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-28 02:14:33,722 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-28 02:14:33,722 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:14:33,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-28 02:14:33,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 117 proven. 288 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-28 02:14:34,494 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:35,350 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:14:35,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2024-11-28 02:14:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 117 proven. 288 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-28 02:14:36,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404750628] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:14:36,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:14:36,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 59 [2024-11-28 02:14:36,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432091529] [2024-11-28 02:14:36,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:14:36,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-28 02:14:36,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:36,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-28 02:14:36,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=3067, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 02:14:36,035 INFO L87 Difference]: Start difference. First operand 308 states and 357 transitions. Second operand has 60 states, 59 states have (on average 4.52542372881356) internal successors, (267), 60 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 02:14:37,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:37,437 INFO L93 Difference]: Finished difference Result 356 states and 408 transitions. [2024-11-28 02:14:37,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 02:14:37,437 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.52542372881356) internal successors, (267), 60 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) Word has length 184 [2024-11-28 02:14:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:37,438 INFO L225 Difference]: With dead ends: 356 [2024-11-28 02:14:37,438 INFO L226 Difference]: Without dead ends: 356 [2024-11-28 02:14:37,438 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=956, Invalid=5686, Unknown=0, NotChecked=0, Total=6642 [2024-11-28 02:14:37,439 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 312 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:37,439 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 1037 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:14:37,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-11-28 02:14:37,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 315. [2024-11-28 02:14:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.1687898089171975) internal successors, (367), 314 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 367 transitions. [2024-11-28 02:14:37,443 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 367 transitions. Word has length 184 [2024-11-28 02:14:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:37,443 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 367 transitions. [2024-11-28 02:14:37,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.52542372881356) internal successors, (267), 60 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 02:14:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 367 transitions. [2024-11-28 02:14:37,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2024-11-28 02:14:37,444 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:37,444 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 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 02:14:37,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-28 02:14:37,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-28 02:14:37,645 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:14:37,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:37,645 INFO L85 PathProgramCache]: Analyzing trace with hash 234318921, now seen corresponding path program 13 times [2024-11-28 02:14:37,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:37,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668269855] [2024-11-28 02:14:37,645 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:14:37,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 90 proven. 378 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-28 02:14:38,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:38,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668269855] [2024-11-28 02:14:38,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668269855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:38,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710890558] [2024-11-28 02:14:38,453 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:14:38,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:38,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:38,455 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:38,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-28 02:14:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:14:38,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 250 conjuncts are in the unsatisfiable core [2024-11-28 02:14:38,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:38,889 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 8 treesize of output 1 [2024-11-28 02:14:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 39 proven. 432 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-28 02:14:40,591 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:40,849 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 20 treesize of output 12 [2024-11-28 02:14:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 39 proven. 432 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-28 02:14:42,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710890558] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:14:42,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:14:42,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29, 29] total 65 [2024-11-28 02:14:42,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718187246] [2024-11-28 02:14:42,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:14:42,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-28 02:14:42,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:42,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-28 02:14:42,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=4007, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 02:14:42,079 INFO L87 Difference]: Start difference. First operand 315 states and 367 transitions. Second operand has 65 states, 65 states have (on average 4.246153846153846) internal successors, (276), 65 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:47,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:47,044 INFO L93 Difference]: Finished difference Result 520 states and 614 transitions. [2024-11-28 02:14:47,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 02:14:47,045 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 4.246153846153846) internal successors, (276), 65 states have internal predecessors, (276), 0 states have call successors, (0), 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 191 [2024-11-28 02:14:47,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:47,046 INFO L225 Difference]: With dead ends: 520 [2024-11-28 02:14:47,046 INFO L226 Difference]: Without dead ends: 323 [2024-11-28 02:14:47,047 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=790, Invalid=10766, Unknown=0, NotChecked=0, Total=11556 [2024-11-28 02:14:47,047 INFO L435 NwaCegarLoop]: 157 mSDtfsCounter, 483 mSDsluCounter, 7217 mSDsCounter, 0 mSdLazyCounter, 4806 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 7374 SdHoareTripleChecker+Invalid, 4807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:47,047 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 7374 Invalid, 4807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4806 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 02:14:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-28 02:14:47,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 321. [2024-11-28 02:14:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.165625) internal successors, (373), 320 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 373 transitions. [2024-11-28 02:14:47,050 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 373 transitions. Word has length 191 [2024-11-28 02:14:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:47,050 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 373 transitions. [2024-11-28 02:14:47,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 4.246153846153846) internal successors, (276), 65 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 373 transitions. [2024-11-28 02:14:47,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2024-11-28 02:14:47,052 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:47,052 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 7, 7, 7, 7, 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 02:14:47,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-28 02:14:47,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:47,252 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:14:47,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:47,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1506641232, now seen corresponding path program 14 times [2024-11-28 02:14:47,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:47,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849709566] [2024-11-28 02:14:47,253 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:14:47,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:47,314 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:14:47,314 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:14:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 117 proven. 383 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-28 02:14:49,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:49,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849709566] [2024-11-28 02:14:49,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849709566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:49,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683327610] [2024-11-28 02:14:49,198 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:14:49,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:49,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:49,200 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:49,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-28 02:14:49,656 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:14:49,656 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:14:49,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-28 02:14:49,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:14:49,672 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 02:14:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 145 proven. 355 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-28 02:14:50,730 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:14:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 155 proven. 345 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-28 02:14:52,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683327610] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:14:52,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:14:52,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 68 [2024-11-28 02:14:52,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635389196] [2024-11-28 02:14:52,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:14:52,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-28 02:14:52,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:14:52,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-28 02:14:52,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=4110, Unknown=0, NotChecked=0, Total=4692 [2024-11-28 02:14:52,950 INFO L87 Difference]: Start difference. First operand 321 states and 373 transitions. Second operand has 69 states, 68 states have (on average 4.779411764705882) internal successors, (325), 69 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:14:56,423 INFO L93 Difference]: Finished difference Result 373 states and 428 transitions. [2024-11-28 02:14:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 02:14:56,423 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 4.779411764705882) internal successors, (325), 69 states have internal predecessors, (325), 0 states have call successors, (0), 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 194 [2024-11-28 02:14:56,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:14:56,425 INFO L225 Difference]: With dead ends: 373 [2024-11-28 02:14:56,425 INFO L226 Difference]: Without dead ends: 373 [2024-11-28 02:14:56,426 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2502 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1447, Invalid=9059, Unknown=0, NotChecked=0, Total=10506 [2024-11-28 02:14:56,426 INFO L435 NwaCegarLoop]: 122 mSDtfsCounter, 1018 mSDsluCounter, 2687 mSDsCounter, 0 mSdLazyCounter, 2724 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 2809 SdHoareTripleChecker+Invalid, 2724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:14:56,426 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1018 Valid, 2809 Invalid, 2724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2724 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-28 02:14:56,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2024-11-28 02:14:56,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 328. [2024-11-28 02:14:56,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.1712538226299694) internal successors, (383), 327 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 02:14:56,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 383 transitions. [2024-11-28 02:14:56,430 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 383 transitions. Word has length 194 [2024-11-28 02:14:56,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:14:56,430 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 383 transitions. [2024-11-28 02:14:56,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 4.779411764705882) internal successors, (325), 69 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:14:56,430 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 383 transitions. [2024-11-28 02:14:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2024-11-28 02:14:56,431 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:14:56,431 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 7, 7, 7, 7, 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 02:14:56,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-28 02:14:56,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-28 02:14:56,632 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:14:56,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:14:56,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1843722456, now seen corresponding path program 15 times [2024-11-28 02:14:56,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:14:56,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106941408] [2024-11-28 02:14:56,632 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:14:56,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:14:56,805 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 02:14:56,805 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:14:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 127 proven. 181 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2024-11-28 02:14:58,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:14:58,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106941408] [2024-11-28 02:14:58,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106941408] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:14:58,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994996092] [2024-11-28 02:14:58,427 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:14:58,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:14:58,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:14:58,429 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:14:58,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-28 02:15:00,104 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 02:15:00,105 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:00,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-28 02:15:00,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:00,853 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 02:15:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 69 proven. 230 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2024-11-28 02:15:01,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:01,997 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 02:15:02,000 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 02:15:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 69 proven. 230 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2024-11-28 02:15:02,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994996092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:02,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:02,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 25] total 76 [2024-11-28 02:15:02,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032692682] [2024-11-28 02:15:02,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:02,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-28 02:15:02,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:02,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-28 02:15:02,675 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=5386, Unknown=0, NotChecked=0, Total=5700 [2024-11-28 02:15:02,676 INFO L87 Difference]: Start difference. First operand 328 states and 383 transitions. Second operand has 76 states, 76 states have (on average 3.3815789473684212) internal successors, (257), 76 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:06,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:06,287 INFO L93 Difference]: Finished difference Result 402 states and 457 transitions. [2024-11-28 02:15:06,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 02:15:06,288 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.3815789473684212) internal successors, (257), 76 states have internal predecessors, (257), 0 states have call successors, (0), 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 201 [2024-11-28 02:15:06,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:06,289 INFO L225 Difference]: With dead ends: 402 [2024-11-28 02:15:06,289 INFO L226 Difference]: Without dead ends: 342 [2024-11-28 02:15:06,289 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3700 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=761, Invalid=11229, Unknown=0, NotChecked=0, Total=11990 [2024-11-28 02:15:06,290 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 108 mSDsluCounter, 2092 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 2150 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:06,290 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 2150 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 02:15:06,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-28 02:15:06,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 336. [2024-11-28 02:15:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.1671641791044776) internal successors, (391), 335 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 391 transitions. [2024-11-28 02:15:06,294 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 391 transitions. Word has length 201 [2024-11-28 02:15:06,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:06,294 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 391 transitions. [2024-11-28 02:15:06,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.3815789473684212) internal successors, (257), 76 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:06,294 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 391 transitions. [2024-11-28 02:15:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2024-11-28 02:15:06,295 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:06,296 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 7, 7, 7, 7, 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 02:15:06,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-28 02:15:06,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:06,496 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:15:06,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:06,497 INFO L85 PathProgramCache]: Analyzing trace with hash 372247247, now seen corresponding path program 16 times [2024-11-28 02:15:06,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:06,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696333054] [2024-11-28 02:15:06,498 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:15:06,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:06,559 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:15:06,559 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 43 proven. 530 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-28 02:15:08,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:08,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696333054] [2024-11-28 02:15:08,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696333054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:08,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903573708] [2024-11-28 02:15:08,262 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:15:08,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:08,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:08,264 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:08,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-28 02:15:08,817 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:15:08,817 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:08,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 267 conjuncts are in the unsatisfiable core [2024-11-28 02:15:08,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 43 proven. 530 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-28 02:15:09,320 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:09,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-28 02:15:09,733 INFO L349 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2024-11-28 02:15:09,734 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 18 treesize of output 17 [2024-11-28 02:15:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 43 proven. 530 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-28 02:15:09,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903573708] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:09,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:09,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 37 [2024-11-28 02:15:09,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932535476] [2024-11-28 02:15:09,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:09,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 02:15:09,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:09,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 02:15:09,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 02:15:09,876 INFO L87 Difference]: Start difference. First operand 336 states and 391 transitions. Second operand has 37 states, 37 states have (on average 4.162162162162162) internal successors, (154), 37 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:12,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:12,184 INFO L93 Difference]: Finished difference Result 520 states and 624 transitions. [2024-11-28 02:15:12,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 02:15:12,185 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.162162162162162) internal successors, (154), 37 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2024-11-28 02:15:12,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:12,185 INFO L225 Difference]: With dead ends: 520 [2024-11-28 02:15:12,186 INFO L226 Difference]: Without dead ends: 344 [2024-11-28 02:15:12,186 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=178, Invalid=2792, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 02:15:12,186 INFO L435 NwaCegarLoop]: 158 mSDtfsCounter, 354 mSDsluCounter, 4236 mSDsCounter, 0 mSdLazyCounter, 2626 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 4394 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:12,186 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 4394 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2626 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 02:15:12,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2024-11-28 02:15:12,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 342. [2024-11-28 02:15:12,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.1642228739002933) internal successors, (397), 341 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 02:15:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 397 transitions. [2024-11-28 02:15:12,192 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 397 transitions. Word has length 205 [2024-11-28 02:15:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:12,192 INFO L471 AbstractCegarLoop]: Abstraction has 342 states and 397 transitions. [2024-11-28 02:15:12,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.162162162162162) internal successors, (154), 37 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:12,193 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 397 transitions. [2024-11-28 02:15:12,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-11-28 02:15:12,194 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:12,194 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 7, 7, 7, 7, 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 02:15:12,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-28 02:15:12,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:12,395 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:15:12,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:12,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2073741928, now seen corresponding path program 17 times [2024-11-28 02:15:12,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:12,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50806348] [2024-11-28 02:15:12,397 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:15:12,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:12,573 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 02:15:12,573 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 33 proven. 572 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-28 02:15:13,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:13,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50806348] [2024-11-28 02:15:13,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50806348] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:13,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938970479] [2024-11-28 02:15:13,530 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:15:13,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:13,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:13,533 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:13,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-28 02:15:14,631 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 02:15:14,631 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:14,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-11-28 02:15:14,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:14,648 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 02:15:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 176 proven. 429 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-28 02:15:16,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 187 proven. 418 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-28 02:15:19,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938970479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:19,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:19,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 84 [2024-11-28 02:15:19,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100576174] [2024-11-28 02:15:19,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:19,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-28 02:15:19,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:19,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-28 02:15:19,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=6464, Unknown=0, NotChecked=0, Total=6972 [2024-11-28 02:15:19,929 INFO L87 Difference]: Start difference. First operand 342 states and 397 transitions. Second operand has 84 states, 84 states have (on average 5.190476190476191) internal successors, (436), 84 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:27,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:27,444 INFO L93 Difference]: Finished difference Result 631 states and 737 transitions. [2024-11-28 02:15:27,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-28 02:15:27,444 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 5.190476190476191) internal successors, (436), 84 states have internal predecessors, (436), 0 states have call successors, (0), 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 208 [2024-11-28 02:15:27,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:27,445 INFO L225 Difference]: With dead ends: 631 [2024-11-28 02:15:27,445 INFO L226 Difference]: Without dead ends: 402 [2024-11-28 02:15:27,446 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5364 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2763, Invalid=25967, Unknown=0, NotChecked=0, Total=28730 [2024-11-28 02:15:27,446 INFO L435 NwaCegarLoop]: 149 mSDtfsCounter, 2839 mSDsluCounter, 6044 mSDsCounter, 0 mSdLazyCounter, 6526 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2839 SdHoareTripleChecker+Valid, 6193 SdHoareTripleChecker+Invalid, 6527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:27,447 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2839 Valid, 6193 Invalid, 6527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6526 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-28 02:15:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2024-11-28 02:15:27,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 355. [2024-11-28 02:15:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.1666666666666667) internal successors, (413), 354 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 413 transitions. [2024-11-28 02:15:27,451 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 413 transitions. Word has length 208 [2024-11-28 02:15:27,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:27,451 INFO L471 AbstractCegarLoop]: Abstraction has 355 states and 413 transitions. [2024-11-28 02:15:27,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 5.190476190476191) internal successors, (436), 84 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:27,451 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 413 transitions. [2024-11-28 02:15:27,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2024-11-28 02:15:27,452 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:27,452 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 10, 10, 10, 10, 7, 7, 7, 7, 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 02:15:27,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-28 02:15:27,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-11-28 02:15:27,653 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:15:27,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:27,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1960389481, now seen corresponding path program 18 times [2024-11-28 02:15:27,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:27,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440354487] [2024-11-28 02:15:27,654 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:15:27,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:27,817 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-28 02:15:27,817 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 307 proven. 153 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2024-11-28 02:15:29,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:29,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440354487] [2024-11-28 02:15:29,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440354487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:29,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476618057] [2024-11-28 02:15:29,596 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:15:29,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:29,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:29,597 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:29,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-28 02:15:31,345 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-28 02:15:31,345 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:31,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-11-28 02:15:31,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 210 proven. 510 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-28 02:15:32,592 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:33,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:15:33,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2024-11-28 02:15:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 210 proven. 510 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-28 02:15:34,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476618057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:34,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:34,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 30] total 85 [2024-11-28 02:15:34,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907448507] [2024-11-28 02:15:34,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:34,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-28 02:15:34,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:34,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-28 02:15:34,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=6461, Unknown=0, NotChecked=0, Total=7140 [2024-11-28 02:15:34,791 INFO L87 Difference]: Start difference. First operand 355 states and 413 transitions. Second operand has 85 states, 85 states have (on average 4.729411764705882) internal successors, (402), 85 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:41,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:41,061 INFO L93 Difference]: Finished difference Result 593 states and 675 transitions. [2024-11-28 02:15:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2024-11-28 02:15:41,061 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 4.729411764705882) internal successors, (402), 85 states have internal predecessors, (402), 0 states have call successors, (0), 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 218 [2024-11-28 02:15:41,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:41,063 INFO L225 Difference]: With dead ends: 593 [2024-11-28 02:15:41,063 INFO L226 Difference]: Without dead ends: 593 [2024-11-28 02:15:41,064 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8199 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=3155, Invalid=22927, Unknown=0, NotChecked=0, Total=26082 [2024-11-28 02:15:41,065 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 1185 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:41,065 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 1848 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2313 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 02:15:41,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2024-11-28 02:15:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 504. [2024-11-28 02:15:41,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.1650099403578529) internal successors, (586), 503 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 586 transitions. [2024-11-28 02:15:41,070 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 586 transitions. Word has length 218 [2024-11-28 02:15:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:41,070 INFO L471 AbstractCegarLoop]: Abstraction has 504 states and 586 transitions. [2024-11-28 02:15:41,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 4.729411764705882) internal successors, (402), 85 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:41,070 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 586 transitions. [2024-11-28 02:15:41,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2024-11-28 02:15:41,071 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:41,071 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:41,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-28 02:15:41,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2024-11-28 02:15:41,272 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:15:41,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash 897964163, now seen corresponding path program 1 times [2024-11-28 02:15:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:41,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669809820] [2024-11-28 02:15:41,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:15:41,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 120 proven. 684 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-28 02:15:42,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:42,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669809820] [2024-11-28 02:15:42,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669809820] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:42,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938503327] [2024-11-28 02:15:42,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:15:42,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:42,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:42,549 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:42,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-28 02:15:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:43,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 318 conjuncts are in the unsatisfiable core [2024-11-28 02:15:43,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:43,033 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 8 treesize of output 1 [2024-11-28 02:15:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 51 proven. 756 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-28 02:15:45,218 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:45,517 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 20 treesize of output 12 [2024-11-28 02:15:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 51 proven. 756 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-28 02:15:47,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938503327] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:47,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:47,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 35, 35] total 80 [2024-11-28 02:15:47,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153194708] [2024-11-28 02:15:47,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:47,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-28 02:15:47,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:47,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-28 02:15:47,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=6131, Unknown=0, NotChecked=0, Total=6320 [2024-11-28 02:15:47,221 INFO L87 Difference]: Start difference. First operand 504 states and 586 transitions. Second operand has 80 states, 80 states have (on average 4.3375) internal successors, (347), 80 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:54,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:54,411 INFO L93 Difference]: Finished difference Result 812 states and 963 transitions. [2024-11-28 02:15:54,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-28 02:15:54,411 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 4.3375) internal successors, (347), 80 states have internal predecessors, (347), 0 states have call successors, (0), 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 226 [2024-11-28 02:15:54,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:54,412 INFO L225 Difference]: With dead ends: 812 [2024-11-28 02:15:54,413 INFO L226 Difference]: Without dead ends: 516 [2024-11-28 02:15:54,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1129, Invalid=16961, Unknown=0, NotChecked=0, Total=18090 [2024-11-28 02:15:54,413 INFO L435 NwaCegarLoop]: 199 mSDtfsCounter, 2016 mSDsluCounter, 11056 mSDsCounter, 0 mSdLazyCounter, 7138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2016 SdHoareTripleChecker+Valid, 11255 SdHoareTripleChecker+Invalid, 7139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:54,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2016 Valid, 11255 Invalid, 7139 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 7138 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-28 02:15:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2024-11-28 02:15:54,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 513. [2024-11-28 02:15:54,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.162109375) internal successors, (595), 512 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 595 transitions. [2024-11-28 02:15:54,418 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 595 transitions. Word has length 226 [2024-11-28 02:15:54,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:54,418 INFO L471 AbstractCegarLoop]: Abstraction has 513 states and 595 transitions. [2024-11-28 02:15:54,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 4.3375) internal successors, (347), 80 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:15:54,419 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 595 transitions. [2024-11-28 02:15:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-11-28 02:15:54,420 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:54,420 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:54,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-11-28 02:15:54,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2024-11-28 02:15:54,620 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:15:54,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:54,621 INFO L85 PathProgramCache]: Analyzing trace with hash 543759516, now seen corresponding path program 2 times [2024-11-28 02:15:54,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:54,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450357919] [2024-11-28 02:15:54,621 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:15:54,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:54,690 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:15:54,690 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 210 proven. 635 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-28 02:15:57,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:57,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450357919] [2024-11-28 02:15:57,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450357919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:57,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453133629] [2024-11-28 02:15:57,544 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:15:57,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:57,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:57,546 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:57,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-28 02:15:58,038 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:15:58,038 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:15:58,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-11-28 02:15:58,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:58,056 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 02:15:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 247 proven. 598 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-28 02:15:59,610 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 260 proven. 585 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-28 02:16:02,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453133629] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:02,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:16:02,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 82 [2024-11-28 02:16:02,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259688956] [2024-11-28 02:16:02,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:02,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-28 02:16:02,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:16:02,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-28 02:16:02,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=5880, Unknown=0, NotChecked=0, Total=6806 [2024-11-28 02:16:02,933 INFO L87 Difference]: Start difference. First operand 513 states and 595 transitions. Second operand has 83 states, 82 states have (on average 4.804878048780488) internal successors, (394), 83 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:06,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:06,269 INFO L93 Difference]: Finished difference Result 579 states and 664 transitions. [2024-11-28 02:16:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-28 02:16:06,270 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 4.804878048780488) internal successors, (394), 83 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2024-11-28 02:16:06,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:06,271 INFO L225 Difference]: With dead ends: 579 [2024-11-28 02:16:06,272 INFO L226 Difference]: Without dead ends: 579 [2024-11-28 02:16:06,272 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3214 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1792, Invalid=10864, Unknown=0, NotChecked=0, Total=12656 [2024-11-28 02:16:06,273 INFO L435 NwaCegarLoop]: 149 mSDtfsCounter, 1211 mSDsluCounter, 3697 mSDsCounter, 0 mSdLazyCounter, 3834 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 3846 SdHoareTripleChecker+Invalid, 3834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:06,273 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1211 Valid, 3846 Invalid, 3834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3834 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 02:16:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2024-11-28 02:16:06,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 520. [2024-11-28 02:16:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.165703275529865) internal successors, (605), 519 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:06,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 605 transitions. [2024-11-28 02:16:06,279 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 605 transitions. Word has length 229 [2024-11-28 02:16:06,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:06,279 INFO L471 AbstractCegarLoop]: Abstraction has 520 states and 605 transitions. [2024-11-28 02:16:06,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 4.804878048780488) internal successors, (394), 83 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 605 transitions. [2024-11-28 02:16:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2024-11-28 02:16:06,280 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:06,280 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:06,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-11-28 02:16:06,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2024-11-28 02:16:06,481 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:16:06,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:06,481 INFO L85 PathProgramCache]: Analyzing trace with hash -546250148, now seen corresponding path program 3 times [2024-11-28 02:16:06,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:16:06,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207682678] [2024-11-28 02:16:06,481 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:16:06,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:16:06,631 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-28 02:16:06,631 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 260 proven. 190 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2024-11-28 02:16:08,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:16:08,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207682678] [2024-11-28 02:16:08,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207682678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:16:08,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738178208] [2024-11-28 02:16:08,026 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:16:08,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:08,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:08,028 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:08,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-28 02:16:09,965 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-28 02:16:09,965 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:09,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-28 02:16:09,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:10,337 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 02:16:10,802 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 02:16:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 130 proven. 290 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-11-28 02:16:10,845 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:10,921 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 02:16:10,924 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 02:16:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 130 proven. 290 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-11-28 02:16:11,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738178208] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:11,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:16:11,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 27, 27] total 60 [2024-11-28 02:16:11,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089391264] [2024-11-28 02:16:11,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:11,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-28 02:16:11,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:16:11,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-28 02:16:11,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3239, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 02:16:11,139 INFO L87 Difference]: Start difference. First operand 520 states and 605 transitions. Second operand has 60 states, 60 states have (on average 3.4833333333333334) internal successors, (209), 60 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:13,664 INFO L93 Difference]: Finished difference Result 640 states and 725 transitions. [2024-11-28 02:16:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 02:16:13,664 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.4833333333333334) internal successors, (209), 60 states have internal predecessors, (209), 0 states have call successors, (0), 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 236 [2024-11-28 02:16:13,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:13,666 INFO L225 Difference]: With dead ends: 640 [2024-11-28 02:16:13,666 INFO L226 Difference]: Without dead ends: 541 [2024-11-28 02:16:13,666 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2722 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=699, Invalid=8231, Unknown=0, NotChecked=0, Total=8930 [2024-11-28 02:16:13,667 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 98 mSDsluCounter, 1945 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 2005 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:13,667 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 2005 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 02:16:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2024-11-28 02:16:13,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 532. [2024-11-28 02:16:13,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 1.1619585687382297) internal successors, (617), 531 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 617 transitions. [2024-11-28 02:16:13,672 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 617 transitions. Word has length 236 [2024-11-28 02:16:13,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:13,672 INFO L471 AbstractCegarLoop]: Abstraction has 532 states and 617 transitions. [2024-11-28 02:16:13,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.4833333333333334) internal successors, (209), 60 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 617 transitions. [2024-11-28 02:16:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2024-11-28 02:16:13,674 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:13,674 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 11, 11, 11, 11, 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, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:13,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-11-28 02:16:13,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-11-28 02:16:13,874 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:16:13,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:13,875 INFO L85 PathProgramCache]: Analyzing trace with hash 955737429, now seen corresponding path program 4 times [2024-11-28 02:16:13,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:16:13,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82466548] [2024-11-28 02:16:13,875 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:16:13,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:16:13,995 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:16:13,995 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 55 proven. 884 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-28 02:16:16,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:16:16,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82466548] [2024-11-28 02:16:16,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82466548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:16:16,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138432980] [2024-11-28 02:16:16,763 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:16:16,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:16,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:16,765 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:16,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-28 02:16:17,485 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:16:17,485 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:17,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 335 conjuncts are in the unsatisfiable core [2024-11-28 02:16:17,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 55 proven. 884 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-28 02:16:18,784 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:18,974 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 20 treesize of output 12 [2024-11-28 02:16:19,223 INFO L349 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2024-11-28 02:16:19,223 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 18 treesize of output 17 [2024-11-28 02:16:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 55 proven. 884 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-28 02:16:19,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138432980] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:19,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:16:19,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 57 [2024-11-28 02:16:19,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750168047] [2024-11-28 02:16:19,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:19,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-28 02:16:19,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:16:19,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-28 02:16:19,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=3057, Unknown=0, NotChecked=0, Total=3192 [2024-11-28 02:16:19,386 INFO L87 Difference]: Start difference. First operand 532 states and 617 transitions. Second operand has 57 states, 57 states have (on average 3.9473684210526314) internal successors, (225), 57 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:22,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:22,842 INFO L93 Difference]: Finished difference Result 804 states and 966 transitions. [2024-11-28 02:16:22,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 02:16:22,843 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.9473684210526314) internal successors, (225), 57 states have internal predecessors, (225), 0 states have call successors, (0), 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 240 [2024-11-28 02:16:22,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:22,845 INFO L225 Difference]: With dead ends: 804 [2024-11-28 02:16:22,845 INFO L226 Difference]: Without dead ends: 544 [2024-11-28 02:16:22,845 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=249, Invalid=5757, Unknown=0, NotChecked=0, Total=6006 [2024-11-28 02:16:22,845 INFO L435 NwaCegarLoop]: 194 mSDtfsCounter, 448 mSDsluCounter, 6952 mSDsCounter, 0 mSdLazyCounter, 4102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 7146 SdHoareTripleChecker+Invalid, 4102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:22,845 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 7146 Invalid, 4102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4102 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-28 02:16:22,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2024-11-28 02:16:22,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 541. [2024-11-28 02:16:22,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.1592592592592592) internal successors, (626), 540 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 626 transitions. [2024-11-28 02:16:22,850 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 626 transitions. Word has length 240 [2024-11-28 02:16:22,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:22,850 INFO L471 AbstractCegarLoop]: Abstraction has 541 states and 626 transitions. [2024-11-28 02:16:22,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.9473684210526314) internal successors, (225), 57 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:22,850 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 626 transitions. [2024-11-28 02:16:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2024-11-28 02:16:22,851 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:22,852 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 11, 11, 11, 11, 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, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:22,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-11-28 02:16:23,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-11-28 02:16:23,052 INFO L396 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:16:23,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:23,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1084754332, now seen corresponding path program 5 times [2024-11-28 02:16:23,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:16:23,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485359895] [2024-11-28 02:16:23,053 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:16:23,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:16:23,198 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-28 02:16:23,199 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 42 proven. 938 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-28 02:16:24,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:16:24,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485359895] [2024-11-28 02:16:24,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485359895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:16:24,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195750311] [2024-11-28 02:16:24,727 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:16:24,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:24,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:24,729 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:24,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-28 02:16:25,749 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-28 02:16:25,750 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:25,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-11-28 02:16:25,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:25,768 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 02:16:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 287 proven. 693 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-28 02:16:28,911 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 301 proven. 679 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-28 02:16:33,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195750311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:33,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:16:33,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 102 [2024-11-28 02:16:33,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605706706] [2024-11-28 02:16:33,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:33,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2024-11-28 02:16:33,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:16:33,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2024-11-28 02:16:33,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=718, Invalid=9584, Unknown=0, NotChecked=0, Total=10302 [2024-11-28 02:16:33,286 INFO L87 Difference]: Start difference. First operand 541 states and 626 transitions. Second operand has 102 states, 102 states have (on average 5.186274509803922) internal successors, (529), 102 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:45,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:45,584 INFO L93 Difference]: Finished difference Result 945 states and 1108 transitions. [2024-11-28 02:16:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2024-11-28 02:16:45,585 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 5.186274509803922) internal successors, (529), 102 states have internal predecessors, (529), 0 states have call successors, (0), 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 02:16:45,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:45,586 INFO L225 Difference]: With dead ends: 945 [2024-11-28 02:16:45,586 INFO L226 Difference]: Without dead ends: 617 [2024-11-28 02:16:45,587 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8322 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=3963, Invalid=39509, Unknown=0, NotChecked=0, Total=43472 [2024-11-28 02:16:45,588 INFO L435 NwaCegarLoop]: 182 mSDtfsCounter, 3048 mSDsluCounter, 8977 mSDsCounter, 0 mSdLazyCounter, 9875 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3048 SdHoareTripleChecker+Valid, 9159 SdHoareTripleChecker+Invalid, 9876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:45,588 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3048 Valid, 9159 Invalid, 9876 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 9875 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-28 02:16:45,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2024-11-28 02:16:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 557. [2024-11-28 02:16:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.160071942446043) internal successors, (645), 556 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 645 transitions. [2024-11-28 02:16:45,593 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 645 transitions. Word has length 243 [2024-11-28 02:16:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:45,593 INFO L471 AbstractCegarLoop]: Abstraction has 557 states and 645 transitions. [2024-11-28 02:16:45,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 5.186274509803922) internal successors, (529), 102 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 645 transitions. [2024-11-28 02:16:45,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2024-11-28 02:16:45,594 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:45,594 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 11, 11, 11, 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, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:45,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-11-28 02:16:45,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:45,794 INFO L396 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:16:45,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:45,795 INFO L85 PathProgramCache]: Analyzing trace with hash 228494563, now seen corresponding path program 6 times [2024-11-28 02:16:45,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:16:45,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542244814] [2024-11-28 02:16:45,795 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:16:45,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:16:45,999 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-28 02:16:46,000 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 513 proven. 68 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2024-11-28 02:16:47,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:16:47,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542244814] [2024-11-28 02:16:47,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542244814] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:16:47,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924783322] [2024-11-28 02:16:47,329 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:16:47,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:47,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:47,331 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:47,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-11-28 02:16:48,719 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-28 02:16:48,720 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:48,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-28 02:16:48,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:49,175 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 02:16:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 312 proven. 110 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2024-11-28 02:16:49,747 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:50,247 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 02:16:50,250 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 02:16:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 312 proven. 110 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2024-11-28 02:16:50,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924783322] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:50,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:16:50,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 60 [2024-11-28 02:16:50,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757710120] [2024-11-28 02:16:50,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:50,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-28 02:16:50,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:16:50,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-28 02:16:50,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3337, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 02:16:50,778 INFO L87 Difference]: Start difference. First operand 557 states and 645 transitions. Second operand has 60 states, 60 states have (on average 4.733333333333333) internal successors, (284), 60 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:53,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:53,812 INFO L93 Difference]: Finished difference Result 674 states and 787 transitions. [2024-11-28 02:16:53,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 02:16:53,813 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 4.733333333333333) internal successors, (284), 60 states have internal predecessors, (284), 0 states have call successors, (0), 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 253 [2024-11-28 02:16:53,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:53,814 INFO L225 Difference]: With dead ends: 674 [2024-11-28 02:16:53,814 INFO L226 Difference]: Without dead ends: 415 [2024-11-28 02:16:53,815 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=536, Invalid=7654, Unknown=0, NotChecked=0, Total=8190 [2024-11-28 02:16:53,815 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 301 mSDsluCounter, 2630 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 2716 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:53,815 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 2716 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 02:16:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2024-11-28 02:16:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2024-11-28 02:16:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.173913043478261) internal successors, (486), 414 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 486 transitions. [2024-11-28 02:16:53,819 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 486 transitions. Word has length 253 [2024-11-28 02:16:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:53,819 INFO L471 AbstractCegarLoop]: Abstraction has 415 states and 486 transitions. [2024-11-28 02:16:53,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 4.733333333333333) internal successors, (284), 60 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:16:53,819 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 486 transitions. [2024-11-28 02:16:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2024-11-28 02:16:53,820 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:53,820 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 11, 11, 11, 8, 8, 8, 8, 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 02:16:53,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-11-28 02:16:54,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2024-11-28 02:16:54,021 INFO L396 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:16:54,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:54,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1369149094, now seen corresponding path program 19 times [2024-11-28 02:16:54,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:16:54,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435392988] [2024-11-28 02:16:54,022 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:16:54,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:16:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 287 proven. 838 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-28 02:16:57,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:16:57,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435392988] [2024-11-28 02:16:57,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435392988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:16:57,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987288423] [2024-11-28 02:16:57,608 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:16:57,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:57,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:57,610 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:57,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-28 02:16:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:58,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 199 conjuncts are in the unsatisfiable core [2024-11-28 02:16:58,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:58,244 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 02:17:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 330 proven. 795 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-28 02:17:00,400 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:17:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 345 proven. 780 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-28 02:17:04,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987288423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:17:04,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:17:04,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 92 [2024-11-28 02:17:04,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433171464] [2024-11-28 02:17:04,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:17:04,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-28 02:17:04,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:17:04,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-28 02:17:04,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1100, Invalid=7456, Unknown=0, NotChecked=0, Total=8556 [2024-11-28 02:17:04,246 INFO L87 Difference]: Start difference. First operand 415 states and 486 transitions. Second operand has 93 states, 92 states have (on average 4.5978260869565215) internal successors, (423), 93 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:17:09,285 INFO L93 Difference]: Finished difference Result 487 states and 561 transitions. [2024-11-28 02:17:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-28 02:17:09,285 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 4.5978260869565215) internal successors, (423), 93 states have internal predecessors, (423), 0 states have call successors, (0), 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 02:17:09,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:17:09,286 INFO L225 Difference]: With dead ends: 487 [2024-11-28 02:17:09,286 INFO L226 Difference]: Without dead ends: 487 [2024-11-28 02:17:09,287 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4976 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2803, Invalid=17219, Unknown=0, NotChecked=0, Total=20022 [2024-11-28 02:17:09,287 INFO L435 NwaCegarLoop]: 167 mSDtfsCounter, 1359 mSDsluCounter, 4190 mSDsCounter, 0 mSdLazyCounter, 4447 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1359 SdHoareTripleChecker+Valid, 4357 SdHoareTripleChecker+Invalid, 4447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:17:09,287 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1359 Valid, 4357 Invalid, 4447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4447 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-28 02:17:09,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2024-11-28 02:17:09,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 422. [2024-11-28 02:17:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.178147268408551) internal successors, (496), 421 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 496 transitions. [2024-11-28 02:17:09,290 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 496 transitions. Word has length 256 [2024-11-28 02:17:09,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:17:09,291 INFO L471 AbstractCegarLoop]: Abstraction has 422 states and 496 transitions. [2024-11-28 02:17:09,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 4.5978260869565215) internal successors, (423), 93 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:09,291 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 496 transitions. [2024-11-28 02:17:09,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2024-11-28 02:17:09,292 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:17:09,293 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 11, 11, 11, 11, 8, 8, 8, 8, 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 02:17:09,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-11-28 02:17:09,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:17:09,493 INFO L396 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:17:09,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:17:09,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1393665058, now seen corresponding path program 20 times [2024-11-28 02:17:09,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:17:09,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238762010] [2024-11-28 02:17:09,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:17:09,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:17:09,634 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:17:09,635 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:17:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 150 proven. 1080 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2024-11-28 02:17:11,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:17:11,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238762010] [2024-11-28 02:17:11,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238762010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:17:11,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844740436] [2024-11-28 02:17:11,118 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:17:11,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:17:11,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:17:11,120 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:17:11,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-28 02:17:11,727 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:17:11,727 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:17:11,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 388 conjuncts are in the unsatisfiable core [2024-11-28 02:17:11,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:17:12,073 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 8 treesize of output 1 [2024-11-28 02:17:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 63 proven. 1170 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-28 02:17:18,325 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:17:18,880 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 20 treesize of output 12 [2024-11-28 02:17:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 63 proven. 1170 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-28 02:17:24,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844740436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:17:24,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:17:24,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 59, 41] total 131 [2024-11-28 02:17:24,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594256158] [2024-11-28 02:17:24,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:17:24,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-11-28 02:17:24,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:17:24,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-11-28 02:17:24,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=16646, Unknown=0, NotChecked=0, Total=17030 [2024-11-28 02:17:24,526 INFO L87 Difference]: Start difference. First operand 422 states and 496 transitions. Second operand has 131 states, 131 states have (on average 4.183206106870229) internal successors, (548), 131 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:17:47,012 INFO L93 Difference]: Finished difference Result 985 states and 1168 transitions. [2024-11-28 02:17:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2024-11-28 02:17:47,012 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 4.183206106870229) internal successors, (548), 131 states have internal predecessors, (548), 0 states have call successors, (0), 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 263 [2024-11-28 02:17:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:17:47,013 INFO L225 Difference]: With dead ends: 985 [2024-11-28 02:17:47,013 INFO L226 Difference]: Without dead ends: 432 [2024-11-28 02:17:47,014 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14950 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=4015, Invalid=72437, Unknown=0, NotChecked=0, Total=76452 [2024-11-28 02:17:47,015 INFO L435 NwaCegarLoop]: 190 mSDtfsCounter, 2521 mSDsluCounter, 13052 mSDsCounter, 0 mSdLazyCounter, 14958 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2521 SdHoareTripleChecker+Valid, 13242 SdHoareTripleChecker+Invalid, 14960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:17:47,015 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2521 Valid, 13242 Invalid, 14960 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 14958 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2024-11-28 02:17:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2024-11-28 02:17:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 428. [2024-11-28 02:17:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.1756440281030445) internal successors, (502), 427 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 502 transitions. [2024-11-28 02:17:47,019 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 502 transitions. Word has length 263 [2024-11-28 02:17:47,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:17:47,019 INFO L471 AbstractCegarLoop]: Abstraction has 428 states and 502 transitions. [2024-11-28 02:17:47,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 4.183206106870229) internal successors, (548), 131 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:17:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 502 transitions. [2024-11-28 02:17:47,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2024-11-28 02:17:47,020 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:17:47,021 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 11, 11, 11, 8, 8, 8, 8, 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 02:17:47,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-11-28 02:17:47,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2024-11-28 02:17:47,221 INFO L396 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:17:47,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:17:47,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1459105883, now seen corresponding path program 21 times [2024-11-28 02:17:47,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:17:47,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430073001] [2024-11-28 02:17:47,222 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:17:47,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:17:47,465 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-28 02:17:47,465 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:17:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 516 proven. 459 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2024-11-28 02:17:50,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:17:50,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430073001] [2024-11-28 02:17:50,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430073001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:17:50,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749187276] [2024-11-28 02:17:50,378 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:17:50,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:17:50,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:17:50,380 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:17:50,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-11-28 02:17:53,465 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-28 02:17:53,466 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:17:53,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 175 conjuncts are in the unsatisfiable core [2024-11-28 02:17:53,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:17:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 376 proven. 904 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-28 02:17:56,160 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:17:58,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:17:58,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2024-11-28 02:18:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 376 proven. 904 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-28 02:18:00,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749187276] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:18:00,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:18:00,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 38, 38] total 108 [2024-11-28 02:18:00,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608028688] [2024-11-28 02:18:00,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:18:00,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-11-28 02:18:00,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:18:00,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-11-28 02:18:00,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=10429, Unknown=0, NotChecked=0, Total=11556 [2024-11-28 02:18:00,490 INFO L87 Difference]: Start difference. First operand 428 states and 502 transitions. Second operand has 108 states, 108 states have (on average 4.935185185185185) internal successors, (533), 108 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 02:18:10,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:18:10,996 INFO L93 Difference]: Finished difference Result 720 states and 825 transitions. [2024-11-28 02:18:10,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-11-28 02:18:10,997 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 4.935185185185185) internal successors, (533), 108 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) Word has length 266 [2024-11-28 02:18:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:18:10,998 INFO L225 Difference]: With dead ends: 720 [2024-11-28 02:18:10,998 INFO L226 Difference]: Without dead ends: 355 [2024-11-28 02:18:11,000 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13176 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=5259, Invalid=39051, Unknown=0, NotChecked=0, Total=44310 [2024-11-28 02:18:11,001 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 1543 mSDsluCounter, 2897 mSDsCounter, 0 mSdLazyCounter, 3461 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 2996 SdHoareTripleChecker+Invalid, 3498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:18:11,001 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1543 Valid, 2996 Invalid, 3498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3461 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 02:18:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2024-11-28 02:18:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 285. [2024-11-28 02:18:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.2007042253521127) internal successors, (341), 284 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:18:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 341 transitions. [2024-11-28 02:18:11,005 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 341 transitions. Word has length 266 [2024-11-28 02:18:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:18:11,005 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 341 transitions. [2024-11-28 02:18:11,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 4.935185185185185) internal successors, (533), 108 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 02:18:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 341 transitions. [2024-11-28 02:18:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2024-11-28 02:18:11,006 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:18:11,007 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 11, 11, 11, 11, 9, 9, 9, 9, 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 02:18:11,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-11-28 02:18:11,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:18:11,207 INFO L396 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:18:11,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:18:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash -536395484, now seen corresponding path program 22 times [2024-11-28 02:18:11,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:18:11,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667425842] [2024-11-28 02:18:11,208 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:18:11,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:18:11,308 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:18:11,308 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:18:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 67 proven. 1328 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-28 02:18:14,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:18:14,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667425842] [2024-11-28 02:18:14,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667425842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:18:14,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076948070] [2024-11-28 02:18:14,537 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:18:14,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:18:14,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:18:14,539 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:18:14,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-28 02:18:15,268 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:18:15,268 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:18:15,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 387 conjuncts are in the unsatisfiable core [2024-11-28 02:18:15,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:18:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 67 proven. 1328 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-28 02:18:15,806 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:18:16,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-28 02:18:16,418 INFO L349 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2024-11-28 02:18:16,418 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 18 treesize of output 17 [2024-11-28 02:18:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 67 proven. 1328 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-28 02:18:16,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076948070] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:18:16,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:18:16,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 49 [2024-11-28 02:18:16,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664269569] [2024-11-28 02:18:16,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:18:16,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-28 02:18:16,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:18:16,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-28 02:18:16,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2247, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 02:18:16,655 INFO L87 Difference]: Start difference. First operand 285 states and 341 transitions. Second operand has 49 states, 49 states have (on average 4.36734693877551) internal successors, (214), 49 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 02:18:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:18:20,938 INFO L93 Difference]: Finished difference Result 489 states and 597 transitions. [2024-11-28 02:18:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 02:18:20,938 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.36734693877551) internal successors, (214), 49 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 277 [2024-11-28 02:18:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:18:20,940 INFO L225 Difference]: With dead ends: 489 [2024-11-28 02:18:20,940 INFO L226 Difference]: Without dead ends: 289 [2024-11-28 02:18:20,940 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=232, Invalid=5024, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 02:18:20,940 INFO L435 NwaCegarLoop]: 230 mSDtfsCounter, 540 mSDsluCounter, 8652 mSDsCounter, 0 mSdLazyCounter, 5195 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 8882 SdHoareTripleChecker+Invalid, 5195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:18:20,941 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 8882 Invalid, 5195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5195 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-28 02:18:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-28 02:18:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2024-11-28 02:18:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.1986062717770034) internal successors, (344), 287 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:18:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 344 transitions. [2024-11-28 02:18:20,945 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 344 transitions. Word has length 277 [2024-11-28 02:18:20,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:18:20,945 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 344 transitions. [2024-11-28 02:18:20,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.36734693877551) internal successors, (214), 49 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 02:18:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 344 transitions. [2024-11-28 02:18:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2024-11-28 02:18:20,947 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:18:20,947 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 11, 11, 11, 9, 9, 9, 9, 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 02:18:20,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-11-28 02:18:21,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:18:21,148 INFO L396 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:18:21,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:18:21,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1994268979, now seen corresponding path program 23 times [2024-11-28 02:18:21,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:18:21,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037632547] [2024-11-28 02:18:21,148 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:18:21,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:18:21,355 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-11-28 02:18:21,355 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:18:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 51 proven. 1394 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-28 02:18:23,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:18:23,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037632547] [2024-11-28 02:18:23,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037632547] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:18:23,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146713405] [2024-11-28 02:18:23,042 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:18:23,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:18:23,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:18:23,044 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:18:23,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-11-28 02:18:24,072 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-11-28 02:18:24,072 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:18:24,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 224 conjuncts are in the unsatisfiable core [2024-11-28 02:18:24,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:18:24,099 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 02:18:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 425 proven. 1020 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-28 02:18:27,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:18:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 442 proven. 1003 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-28 02:18:33,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146713405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:18:33,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:18:33,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 120 [2024-11-28 02:18:33,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229061748] [2024-11-28 02:18:33,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:18:33,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2024-11-28 02:18:33,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:18:33,177 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2024-11-28 02:18:33,178 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=13316, Unknown=0, NotChecked=0, Total=14280 [2024-11-28 02:18:33,178 INFO L87 Difference]: Start difference. First operand 288 states and 344 transitions. Second operand has 120 states, 120 states have (on average 5.133333333333334) internal successors, (616), 120 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:18:48,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:18:48,467 INFO L93 Difference]: Finished difference Result 651 states and 762 transitions. [2024-11-28 02:18:48,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-11-28 02:18:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 5.133333333333334) internal successors, (616), 120 states have internal predecessors, (616), 0 states have call successors, (0), 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 280 [2024-11-28 02:18:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:18:48,469 INFO L225 Difference]: With dead ends: 651 [2024-11-28 02:18:48,469 INFO L226 Difference]: Without dead ends: 368 [2024-11-28 02:18:48,471 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11928 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=5370, Invalid=55886, Unknown=0, NotChecked=0, Total=61256 [2024-11-28 02:18:48,472 INFO L435 NwaCegarLoop]: 215 mSDtfsCounter, 4452 mSDsluCounter, 11666 mSDsCounter, 0 mSdLazyCounter, 13188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4452 SdHoareTripleChecker+Valid, 11881 SdHoareTripleChecker+Invalid, 13189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:18:48,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4452 Valid, 11881 Invalid, 13189 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 13188 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2024-11-28 02:18:48,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-11-28 02:18:48,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 298. [2024-11-28 02:18:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.202020202020202) internal successors, (357), 297 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:18:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 357 transitions. [2024-11-28 02:18:48,476 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 357 transitions. Word has length 280 [2024-11-28 02:18:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:18:48,476 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 357 transitions. [2024-11-28 02:18:48,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 5.133333333333334) internal successors, (616), 120 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:18:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 357 transitions. [2024-11-28 02:18:48,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2024-11-28 02:18:48,478 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:18:48,478 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 11, 11, 11, 9, 9, 9, 9, 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 02:18:48,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-11-28 02:18:48,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:18:48,679 INFO L396 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:18:48,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:18:48,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1862676276, now seen corresponding path program 24 times [2024-11-28 02:18:48,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:18:48,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713983300] [2024-11-28 02:18:48,680 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:18:48,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:18:48,951 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-28 02:18:48,951 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:18:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 814 proven. 194 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2024-11-28 02:18:51,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:18:51,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713983300] [2024-11-28 02:18:51,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713983300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:18:51,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305010146] [2024-11-28 02:18:51,543 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:18:51,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:18:51,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:18:51,545 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:18:51,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-11-28 02:18:55,441 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-28 02:18:55,441 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:18:55,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-11-28 02:18:55,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:18:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 477 proven. 1143 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-28 02:18:57,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:18:59,977 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:18:59,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2024-11-28 02:19:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 477 proven. 1143 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-28 02:19:01,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305010146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:19:01,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:19:01,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 42, 42] total 112 [2024-11-28 02:19:01,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541998265] [2024-11-28 02:19:01,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:19:01,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-11-28 02:19:01,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:19:01,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-11-28 02:19:01,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=11100, Unknown=0, NotChecked=0, Total=12432 [2024-11-28 02:19:01,918 INFO L87 Difference]: Start difference. First operand 298 states and 357 transitions. Second operand has 112 states, 112 states have (on average 4.9375) internal successors, (553), 112 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:19:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:19:11,071 INFO L93 Difference]: Finished difference Result 604 states and 694 transitions. [2024-11-28 02:19:11,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-11-28 02:19:11,072 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 4.9375) internal successors, (553), 112 states have internal predecessors, (553), 0 states have call successors, (0), 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 290 [2024-11-28 02:19:11,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:19:11,073 INFO L225 Difference]: With dead ends: 604 [2024-11-28 02:19:11,073 INFO L226 Difference]: Without dead ends: 603 [2024-11-28 02:19:11,075 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14334 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=5564, Invalid=37492, Unknown=0, NotChecked=0, Total=43056 [2024-11-28 02:19:11,076 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 1634 mSDsluCounter, 2447 mSDsCounter, 0 mSdLazyCounter, 3067 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 SdHoareTripleChecker+Valid, 2548 SdHoareTripleChecker+Invalid, 3116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 3067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:19:11,076 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1634 Valid, 2548 Invalid, 3116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 3067 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-28 02:19:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2024-11-28 02:19:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 484. [2024-11-28 02:19:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.1884057971014492) internal successors, (574), 483 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:19:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 574 transitions. [2024-11-28 02:19:11,084 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 574 transitions. Word has length 290 [2024-11-28 02:19:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:19:11,085 INFO L471 AbstractCegarLoop]: Abstraction has 484 states and 574 transitions. [2024-11-28 02:19:11,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 4.9375) internal successors, (553), 112 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:19:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 574 transitions. [2024-11-28 02:19:11,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2024-11-28 02:19:11,087 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:19:11,087 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 11, 11, 11, 11, 10, 10, 10, 10, 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 02:19:11,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-11-28 02:19:11,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:19:11,288 INFO L396 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:19:11,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:19:11,288 INFO L85 PathProgramCache]: Analyzing trace with hash 291014443, now seen corresponding path program 25 times [2024-11-28 02:19:11,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:19:11,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294778492] [2024-11-28 02:19:11,289 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:19:11,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:19:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:19:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 180 proven. 1566 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2024-11-28 02:19:13,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:19:13,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294778492] [2024-11-28 02:19:13,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294778492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:19:13,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695172264] [2024-11-28 02:19:13,348 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:19:13,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:19:13,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:19:13,350 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:19:13,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-11-28 02:19:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:19:13,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 1443 conjuncts, 430 conjuncts are in the unsatisfiable core [2024-11-28 02:19:13,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:19:14,002 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 8 treesize of output 1 [2024-11-28 02:19:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 75 proven. 1674 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2024-11-28 02:19:18,092 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:19:18,513 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 20 treesize of output 12 [2024-11-28 02:19:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 75 proven. 1674 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2024-11-28 02:19:22,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695172264] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:19:22,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:19:22,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 47, 47] total 110 [2024-11-28 02:19:22,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246891714] [2024-11-28 02:19:22,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:19:22,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-11-28 02:19:22,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:19:22,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-11-28 02:19:22,119 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=11729, Unknown=0, NotChecked=0, Total=11990 [2024-11-28 02:19:22,119 INFO L87 Difference]: Start difference. First operand 484 states and 574 transitions. Second operand has 110 states, 110 states have (on average 4.390909090909091) internal successors, (483), 110 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:19:36,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:19:36,482 INFO L93 Difference]: Finished difference Result 857 states and 1027 transitions. [2024-11-28 02:19:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-11-28 02:19:36,482 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 4.390909090909091) internal successors, (483), 110 states have internal predecessors, (483), 0 states have call successors, (0), 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 301 [2024-11-28 02:19:36,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:19:36,484 INFO L225 Difference]: With dead ends: 857 [2024-11-28 02:19:36,484 INFO L226 Difference]: Without dead ends: 492 [2024-11-28 02:19:36,485 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3379 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1969, Invalid=33563, Unknown=0, NotChecked=0, Total=35532 [2024-11-28 02:19:36,485 INFO L435 NwaCegarLoop]: 283 mSDtfsCounter, 5449 mSDsluCounter, 22194 mSDsCounter, 0 mSdLazyCounter, 14500 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5449 SdHoareTripleChecker+Valid, 22477 SdHoareTripleChecker+Invalid, 14501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:19:36,485 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5449 Valid, 22477 Invalid, 14501 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 14500 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2024-11-28 02:19:36,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2024-11-28 02:19:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 490. [2024-11-28 02:19:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.1860940695296525) internal successors, (580), 489 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:19:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 580 transitions. [2024-11-28 02:19:36,490 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 580 transitions. Word has length 301 [2024-11-28 02:19:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:19:36,491 INFO L471 AbstractCegarLoop]: Abstraction has 490 states and 580 transitions. [2024-11-28 02:19:36,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 4.390909090909091) internal successors, (483), 110 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:19:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 580 transitions. [2024-11-28 02:19:36,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2024-11-28 02:19:36,492 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:19:36,492 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 11, 11, 11, 11, 10, 10, 10, 10, 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 02:19:36,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-11-28 02:19:36,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:19:36,693 INFO L396 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:19:36,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:19:36,693 INFO L85 PathProgramCache]: Analyzing trace with hash -845760628, now seen corresponding path program 26 times [2024-11-28 02:19:36,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:19:36,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392889495] [2024-11-28 02:19:36,694 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:19:36,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:19:36,809 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:19:36,809 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:19:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 532 proven. 1273 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2024-11-28 02:19:41,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:19:41,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392889495] [2024-11-28 02:19:41,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392889495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:19:41,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308146239] [2024-11-28 02:19:41,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:19:41,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:19:41,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:19:41,235 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:19:41,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-11-28 02:19:41,938 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:19:41,938 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:19:41,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 245 conjuncts are in the unsatisfiable core [2024-11-28 02:19:41,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:19:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 532 proven. 1273 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2024-11-28 02:19:44,863 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:19:47,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:19:47,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2024-11-28 02:19:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 532 proven. 1273 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2024-11-28 02:19:49,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308146239] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:19:49,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:19:49,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 45, 45] total 112 [2024-11-28 02:19:49,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28639743] [2024-11-28 02:19:49,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:19:49,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-11-28 02:19:49,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:19:49,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-11-28 02:19:49,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1536, Invalid=11120, Unknown=0, NotChecked=0, Total=12656 [2024-11-28 02:19:49,924 INFO L87 Difference]: Start difference. First operand 490 states and 580 transitions. Second operand has 113 states, 112 states have (on average 4.732142857142857) internal successors, (530), 113 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:19:57,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:19:57,333 INFO L93 Difference]: Finished difference Result 578 states and 671 transitions. [2024-11-28 02:19:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-28 02:19:57,334 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 4.732142857142857) internal successors, (530), 113 states have internal predecessors, (530), 0 states have call successors, (0), 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 304 [2024-11-28 02:19:57,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:19:57,336 INFO L225 Difference]: With dead ends: 578 [2024-11-28 02:19:57,336 INFO L226 Difference]: Without dead ends: 578 [2024-11-28 02:19:57,337 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6058 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2322, Invalid=21240, Unknown=0, NotChecked=0, Total=23562 [2024-11-28 02:19:57,337 INFO L435 NwaCegarLoop]: 203 mSDtfsCounter, 976 mSDsluCounter, 6948 mSDsCounter, 0 mSdLazyCounter, 7179 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 7151 SdHoareTripleChecker+Invalid, 7179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:19:57,337 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 7151 Invalid, 7179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7179 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-28 02:19:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2024-11-28 02:19:57,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 497. [2024-11-28 02:19:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 1.189516129032258) internal successors, (590), 496 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:19:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 590 transitions. [2024-11-28 02:19:57,341 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 590 transitions. Word has length 304 [2024-11-28 02:19:57,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:19:57,341 INFO L471 AbstractCegarLoop]: Abstraction has 497 states and 590 transitions. [2024-11-28 02:19:57,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 4.732142857142857) internal successors, (530), 113 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:19:57,342 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 590 transitions. [2024-11-28 02:19:57,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2024-11-28 02:19:57,343 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:19:57,343 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 11, 11, 11, 11, 10, 10, 10, 10, 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 02:19:57,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2024-11-28 02:19:57,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:19:57,543 INFO L396 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:19:57,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:19:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1304172908, now seen corresponding path program 27 times [2024-11-28 02:19:57,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:19:57,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763078070] [2024-11-28 02:19:57,544 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:19:57,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:19:57,836 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-28 02:19:57,836 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:20:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 551 proven. 231 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2024-11-28 02:20:00,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:20:00,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763078070] [2024-11-28 02:20:00,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763078070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:20:00,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895241266] [2024-11-28 02:20:00,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:20:00,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:20:00,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:20:00,084 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:20:00,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-11-28 02:20:08,415 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-28 02:20:08,415 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:20:08,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-28 02:20:08,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:20:09,844 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 02:20:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 290 proven. 547 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2024-11-28 02:20:10,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:20:11,681 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 02:20:11,683 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 02:20:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 290 proven. 357 refuted. 0 times theorem prover too weak. 1715 trivial. 0 not checked. [2024-11-28 02:20:12,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895241266] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:20:12,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:20:12,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 42, 29] total 106 [2024-11-28 02:20:12,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353724571] [2024-11-28 02:20:12,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:20:12,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-11-28 02:20:12,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:20:12,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-11-28 02:20:12,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=10563, Unknown=0, NotChecked=0, Total=11130 [2024-11-28 02:20:12,773 INFO L87 Difference]: Start difference. First operand 497 states and 590 transitions. Second operand has 106 states, 106 states have (on average 3.349056603773585) internal successors, (355), 106 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:20:20,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:20:20,183 INFO L93 Difference]: Finished difference Result 590 states and 684 transitions. [2024-11-28 02:20:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-28 02:20:20,183 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.349056603773585) internal successors, (355), 106 states have internal predecessors, (355), 0 states have call successors, (0), 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 311 [2024-11-28 02:20:20,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:20:20,185 INFO L225 Difference]: With dead ends: 590 [2024-11-28 02:20:20,185 INFO L226 Difference]: Without dead ends: 518 [2024-11-28 02:20:20,187 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7397 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1168, Invalid=23012, Unknown=0, NotChecked=0, Total=24180 [2024-11-28 02:20:20,188 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 162 mSDsluCounter, 3514 mSDsCounter, 0 mSdLazyCounter, 5716 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 5727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 5716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:20:20,188 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 3582 Invalid, 5727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 5716 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-28 02:20:20,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2024-11-28 02:20:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 505. [2024-11-28 02:20:20,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.1865079365079365) internal successors, (598), 504 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:20:20,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 598 transitions. [2024-11-28 02:20:20,193 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 598 transitions. Word has length 311 [2024-11-28 02:20:20,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:20:20,193 INFO L471 AbstractCegarLoop]: Abstraction has 505 states and 598 transitions. [2024-11-28 02:20:20,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.349056603773585) internal successors, (355), 106 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:20:20,193 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 598 transitions. [2024-11-28 02:20:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2024-11-28 02:20:20,194 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:20:20,194 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 12, 12, 12, 12, 10, 10, 10, 10, 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 02:20:20,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2024-11-28 02:20:20,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2024-11-28 02:20:20,395 INFO L396 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:20:20,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:20:20,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1379010349, now seen corresponding path program 28 times [2024-11-28 02:20:20,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:20:20,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825751926] [2024-11-28 02:20:20,396 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:20:20,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:20:20,526 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:20:20,526 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:20:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2407 backedges. 79 proven. 1862 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-28 02:20:25,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:20:25,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825751926] [2024-11-28 02:20:25,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825751926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:20:25,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726583060] [2024-11-28 02:20:25,247 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:20:25,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:20:25,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:20:25,250 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:20:25,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-11-28 02:20:26,370 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:20:26,370 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:20:26,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 447 conjuncts are in the unsatisfiable core [2024-11-28 02:20:26,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:20:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2407 backedges. 79 proven. 1862 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-28 02:20:28,707 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:20:29,022 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 20 treesize of output 12 [2024-11-28 02:20:29,440 INFO L349 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2024-11-28 02:20:29,440 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 18 treesize of output 17 [2024-11-28 02:20:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2407 backedges. 79 proven. 1862 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-28 02:20:29,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726583060] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:20:29,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:20:29,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 75 [2024-11-28 02:20:29,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961442995] [2024-11-28 02:20:29,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:20:29,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-28 02:20:29,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:20:29,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-28 02:20:29,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=5373, Unknown=0, NotChecked=0, Total=5550 [2024-11-28 02:20:29,711 INFO L87 Difference]: Start difference. First operand 505 states and 598 transitions. Second operand has 75 states, 75 states have (on average 4.026666666666666) internal successors, (302), 75 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:20:36,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:20:36,717 INFO L93 Difference]: Finished difference Result 812 states and 992 transitions. [2024-11-28 02:20:36,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-28 02:20:36,717 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.026666666666666) internal successors, (302), 75 states have internal predecessors, (302), 0 states have call successors, (0), 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 315 [2024-11-28 02:20:36,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:20:36,720 INFO L225 Difference]: With dead ends: 812 [2024-11-28 02:20:36,720 INFO L226 Difference]: Without dead ends: 513 [2024-11-28 02:20:36,721 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 605 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=321, Invalid=9981, Unknown=0, NotChecked=0, Total=10302 [2024-11-28 02:20:36,721 INFO L435 NwaCegarLoop]: 266 mSDtfsCounter, 633 mSDsluCounter, 15486 mSDsCounter, 0 mSdLazyCounter, 8466 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 15752 SdHoareTripleChecker+Invalid, 8466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:20:36,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 15752 Invalid, 8466 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 8466 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-11-28 02:20:36,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2024-11-28 02:20:36,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 511. [2024-11-28 02:20:36,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.184313725490196) internal successors, (604), 510 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:20:36,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 604 transitions. [2024-11-28 02:20:36,728 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 604 transitions. Word has length 315 [2024-11-28 02:20:36,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:20:36,728 INFO L471 AbstractCegarLoop]: Abstraction has 511 states and 604 transitions. [2024-11-28 02:20:36,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.026666666666666) internal successors, (302), 75 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:20:36,728 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 604 transitions. [2024-11-28 02:20:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2024-11-28 02:20:36,729 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:20:36,729 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 12, 12, 12, 12, 10, 10, 10, 10, 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 02:20:36,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-11-28 02:20:36,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2024-11-28 02:20:36,930 INFO L396 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:20:36,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:20:36,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1619171270, now seen corresponding path program 29 times [2024-11-28 02:20:36,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:20:36,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145863419] [2024-11-28 02:20:36,931 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:20:36,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:20:37,295 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-11-28 02:20:37,295 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:20:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 60 proven. 1940 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-28 02:20:39,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:20:39,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145863419] [2024-11-28 02:20:39,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145863419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:20:39,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612322783] [2024-11-28 02:20:39,911 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:20:39,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:20:39,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:20:39,913 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:20:39,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-11-28 02:20:41,452 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-11-28 02:20:41,452 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:20:41,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 1520 conjuncts, 257 conjuncts are in the unsatisfiable core [2024-11-28 02:20:41,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:20:41,480 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 02:20:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 590 proven. 1410 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-28 02:20:47,020 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:20:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 610 proven. 1390 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-28 02:20:55,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612322783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:20:55,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:20:55,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 138 [2024-11-28 02:20:55,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892829379] [2024-11-28 02:20:55,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:20:55,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2024-11-28 02:20:55,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:20:55,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2024-11-28 02:20:55,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1246, Invalid=17660, Unknown=0, NotChecked=0, Total=18906 [2024-11-28 02:20:55,590 INFO L87 Difference]: Start difference. First operand 511 states and 604 transitions. Second operand has 138 states, 138 states have (on average 5.115942028985507) internal successors, (706), 138 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:21:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:21,230 INFO L93 Difference]: Finished difference Result 1004 states and 1186 transitions. [2024-11-28 02:21:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2024-11-28 02:21:21,230 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 5.115942028985507) internal successors, (706), 138 states have internal predecessors, (706), 0 states have call successors, (0), 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 318 [2024-11-28 02:21:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:21,232 INFO L225 Difference]: With dead ends: 1004 [2024-11-28 02:21:21,232 INFO L226 Difference]: Without dead ends: 607 [2024-11-28 02:21:21,236 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16182 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=6984, Invalid=75098, Unknown=0, NotChecked=0, Total=82082 [2024-11-28 02:21:21,237 INFO L435 NwaCegarLoop]: 248 mSDtfsCounter, 4872 mSDsluCounter, 15917 mSDsCounter, 0 mSdLazyCounter, 18312 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4872 SdHoareTripleChecker+Valid, 16165 SdHoareTripleChecker+Invalid, 18313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:21,237 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4872 Valid, 16165 Invalid, 18313 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 18312 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2024-11-28 02:21:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2024-11-28 02:21:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 524. [2024-11-28 02:21:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.1854684512428297) internal successors, (620), 523 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:21:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 620 transitions. [2024-11-28 02:21:21,241 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 620 transitions. Word has length 318 [2024-11-28 02:21:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:21,241 INFO L471 AbstractCegarLoop]: Abstraction has 524 states and 620 transitions. [2024-11-28 02:21:21,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 5.115942028985507) internal successors, (706), 138 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:21:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 620 transitions. [2024-11-28 02:21:21,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2024-11-28 02:21:21,243 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:21,243 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 12, 12, 12, 12, 10, 10, 10, 10, 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 02:21:21,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-11-28 02:21:21,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:21,443 INFO L396 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:21:21,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:21,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1714082011, now seen corresponding path program 30 times [2024-11-28 02:21:21,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:21,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950918806] [2024-11-28 02:21:21,444 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:21:21,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:21,791 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2024-11-28 02:21:21,791 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:21:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2671 backedges. 463 proven. 393 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2024-11-28 02:21:24,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:24,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950918806] [2024-11-28 02:21:24,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950918806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:21:24,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21478786] [2024-11-28 02:21:24,326 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:21:24,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:24,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:21:24,328 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:21:24,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-11-28 02:21:36,216 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2024-11-28 02:21:36,216 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:21:36,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 1573 conjuncts, 220 conjuncts are in the unsatisfiable core [2024-11-28 02:21:36,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:21:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2671 backedges. 651 proven. 1554 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-28 02:21:39,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:21:41,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:41,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2024-11-28 02:21:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2671 backedges. 651 proven. 1554 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-28 02:21:44,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21478786] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:21:44,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:21:44,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 48, 48] total 129 [2024-11-28 02:21:44,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829322765] [2024-11-28 02:21:44,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:21:44,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-11-28 02:21:44,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:44,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-11-28 02:21:44,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1768, Invalid=14744, Unknown=0, NotChecked=0, Total=16512 [2024-11-28 02:21:44,437 INFO L87 Difference]: Start difference. First operand 524 states and 620 transitions. Second operand has 129 states, 129 states have (on average 4.651162790697675) internal successors, (600), 129 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:21:50,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:50,578 INFO L93 Difference]: Finished difference Result 716 states and 815 transitions. [2024-11-28 02:21:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-11-28 02:21:50,579 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 4.651162790697675) internal successors, (600), 129 states have internal predecessors, (600), 0 states have call successors, (0), 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 328 [2024-11-28 02:21:50,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:50,580 INFO L225 Difference]: With dead ends: 716 [2024-11-28 02:21:50,580 INFO L226 Difference]: Without dead ends: 634 [2024-11-28 02:21:50,583 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14423 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=4237, Invalid=35165, Unknown=0, NotChecked=0, Total=39402 [2024-11-28 02:21:50,583 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 1327 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:50,583 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1327 Valid, 1650 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 02:21:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2024-11-28 02:21:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 539. [2024-11-28 02:21:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.1858736059479553) internal successors, (638), 538 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:21:50,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 638 transitions. [2024-11-28 02:21:50,587 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 638 transitions. Word has length 328 [2024-11-28 02:21:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:50,587 INFO L471 AbstractCegarLoop]: Abstraction has 539 states and 638 transitions. [2024-11-28 02:21:50,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 4.651162790697675) internal successors, (600), 129 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:21:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 638 transitions. [2024-11-28 02:21:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2024-11-28 02:21:50,588 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:50,588 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 21, 21, 13, 13, 13, 13, 10, 10, 10, 10, 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 02:21:50,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2024-11-28 02:21:50,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:50,789 INFO L396 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:21:50,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:50,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1623289370, now seen corresponding path program 31 times [2024-11-28 02:21:50,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:50,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392957136] [2024-11-28 02:21:50,789 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:21:50,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2870 backedges. 210 proven. 2142 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2024-11-28 02:21:53,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:53,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392957136] [2024-11-28 02:21:53,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392957136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:21:53,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016969310] [2024-11-28 02:21:53,665 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:21:53,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:53,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:21:53,667 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:21:53,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efd62b1-d139-4cf1-8988-4890b6adabb2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-11-28 02:21:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:54,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 490 conjuncts are in the unsatisfiable core [2024-11-28 02:21:54,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:21:54,507 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 8 treesize of output 1