./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 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/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_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC --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-6497de0 [2024-11-23 23:20:17,825 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:20:17,942 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 23:20:17,949 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:20:17,954 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:20:17,997 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:20:17,998 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:20:17,998 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:20:17,999 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:20:17,999 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:20:18,000 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:20:18,001 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:20:18,001 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:20:18,002 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:20:18,002 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:20:18,002 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:20:18,002 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:20:18,002 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:20:18,002 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:20:18,002 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:20:18,002 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 23:20:18,002 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 23:20:18,003 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 23:20:18,003 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:20:18,003 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 23:20:18,003 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 23:20:18,003 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:20:18,003 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:20:18,003 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:20:18,003 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:20:18,003 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:20:18,004 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:20:18,004 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:20:18,004 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:20:18,004 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:20:18,004 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:20:18,004 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:20:18,004 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:20:18,004 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:20:18,006 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:20:18,006 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:20:18,006 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:20:18,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:20:18,007 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:20:18,007 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:20:18,007 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:20:18,007 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:20:18,008 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_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC 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 [2024-11-23 23:20:18,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:20:18,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:20:18,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:20:18,393 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:20:18,394 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:20:18,395 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2024-11-23 23:20:21,497 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/data/66a276d6c/7aafae7954664c699fb11b37dcf0eb36/FLAGd08ec9288 [2024-11-23 23:20:22,001 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:20:22,002 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2024-11-23 23:20:22,028 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/data/66a276d6c/7aafae7954664c699fb11b37dcf0eb36/FLAGd08ec9288 [2024-11-23 23:20:22,052 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/data/66a276d6c/7aafae7954664c699fb11b37dcf0eb36 [2024-11-23 23:20:22,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:20:22,058 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:20:22,060 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:20:22,061 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:20:22,067 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:20:22,068 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f141a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22, skipping insertion in model container [2024-11-23 23:20:22,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,117 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:20:22,480 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:20:22,482 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:20:22,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:20:22,514 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:20:22,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:20:22,620 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:20:22,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22 WrapperNode [2024-11-23 23:20:22,621 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:20:22,623 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:20:22,623 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:20:22,623 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:20:22,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,659 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,696 INFO L138 Inliner]: procedures = 119, calls = 23, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 160 [2024-11-23 23:20:22,697 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:20:22,699 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:20:22,699 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:20:22,699 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:20:22,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,716 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,755 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]. [2024-11-23 23:20:22,755 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,755 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,770 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,773 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,781 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,783 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,784 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,790 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:20:22,791 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:20:22,792 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:20:22,792 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:20:22,794 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22" (1/1) ... [2024-11-23 23:20:22,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:20:22,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:20:22,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:20:22,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:20:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:20:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:20:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:20:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:20:22,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-23 23:20:22,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-23 23:20:22,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:20:22,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:20:23,068 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:20:23,070 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:20:23,512 INFO L? ?]: Removed 97 outVars from TransFormulas that were not future-live. [2024-11-23 23:20:23,514 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:20:23,529 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:20:23,530 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-23 23:20:23,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:20:23 BoogieIcfgContainer [2024-11-23 23:20:23,530 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:20:23,534 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:20:23,536 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:20:23,542 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:20:23,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:20:22" (1/3) ... [2024-11-23 23:20:23,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463d62a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:20:23, skipping insertion in model container [2024-11-23 23:20:23,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:22" (2/3) ... [2024-11-23 23:20:23,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463d62a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:20:23, skipping insertion in model container [2024-11-23 23:20:23,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:20:23" (3/3) ... [2024-11-23 23:20:23,548 INFO L128 eAbstractionObserver]: Analyzing ICFG openbsd_cstrstr-alloca-2.i [2024-11-23 23:20:23,569 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:20:23,570 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. [2024-11-23 23:20:23,639 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:20:23,661 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;@2b09506b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:20:23,661 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-23 23:20:23,667 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) [2024-11-23 23:20:23,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-23 23:20:23,674 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:23,675 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:20:23,675 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)] === [2024-11-23 23:20:23,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:23,684 INFO L85 PathProgramCache]: Analyzing trace with hash 121325233, now seen corresponding path program 1 times [2024-11-23 23:20:23,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:23,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409127557] [2024-11-23 23:20:23,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:23,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:20:24,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:24,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409127557] [2024-11-23 23:20:24,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409127557] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:24,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:20:24,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:20:24,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653242117] [2024-11-23 23:20:24,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:24,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:20:24,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:24,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:20:24,205 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:20:24,208 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) [2024-11-23 23:20:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:24,333 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2024-11-23 23:20:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:20:24,335 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 [2024-11-23 23:20:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:24,342 INFO L225 Difference]: With dead ends: 77 [2024-11-23 23:20:24,342 INFO L226 Difference]: Without dead ends: 75 [2024-11-23 23:20:24,344 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 [2024-11-23 23:20:24,347 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 [2024-11-23 23:20:24,348 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] [2024-11-23 23:20:24,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-23 23:20:24,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-23 23:20:24,385 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) [2024-11-23 23:20:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2024-11-23 23:20:24,396 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 8 [2024-11-23 23:20:24,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:24,396 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2024-11-23 23:20:24,396 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) [2024-11-23 23:20:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2024-11-23 23:20:24,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-23 23:20:24,397 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:24,397 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:20:24,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:20:24,398 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)] === [2024-11-23 23:20:24,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash 121325234, now seen corresponding path program 1 times [2024-11-23 23:20:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:24,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905584690] [2024-11-23 23:20:24,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:24,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:20:24,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:24,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905584690] [2024-11-23 23:20:24,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905584690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:24,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:20:24,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:20:24,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845552510] [2024-11-23 23:20:24,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:24,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:20:24,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:24,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:20:24,944 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:20:24,944 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) [2024-11-23 23:20:25,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:25,240 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2024-11-23 23:20:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:20:25,241 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 [2024-11-23 23:20:25,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:25,242 INFO L225 Difference]: With dead ends: 95 [2024-11-23 23:20:25,242 INFO L226 Difference]: Without dead ends: 95 [2024-11-23 23:20:25,244 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 [2024-11-23 23:20:25,245 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 24 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-11-23 23:20:25,247 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] [2024-11-23 23:20:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-23 23:20:25,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2024-11-23 23:20:25,261 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) [2024-11-23 23:20:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2024-11-23 23:20:25,262 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 8 [2024-11-23 23:20:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:25,263 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2024-11-23 23:20:25,263 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) [2024-11-23 23:20:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2024-11-23 23:20:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-23 23:20:25,267 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:25,267 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:20:25,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:20:25,267 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)] === [2024-11-23 23:20:25,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:25,268 INFO L85 PathProgramCache]: Analyzing trace with hash 178583536, now seen corresponding path program 1 times [2024-11-23 23:20:25,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:25,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628886790] [2024-11-23 23:20:25,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:25,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:20:25,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:25,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628886790] [2024-11-23 23:20:25,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628886790] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:25,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:20:25,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:20:25,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621694143] [2024-11-23 23:20:25,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:25,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:20:25,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:25,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:20:25,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:20:25,615 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) [2024-11-23 23:20:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:25,734 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2024-11-23 23:20:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:20:25,735 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 [2024-11-23 23:20:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:25,736 INFO L225 Difference]: With dead ends: 84 [2024-11-23 23:20:25,736 INFO L226 Difference]: Without dead ends: 84 [2024-11-23 23:20:25,737 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 [2024-11-23 23:20:25,738 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 [2024-11-23 23:20:25,742 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] [2024-11-23 23:20:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-23 23:20:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2024-11-23 23:20:25,752 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) [2024-11-23 23:20:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2024-11-23 23:20:25,753 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 8 [2024-11-23 23:20:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:25,753 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2024-11-23 23:20:25,753 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) [2024-11-23 23:20:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2024-11-23 23:20:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-23 23:20:25,754 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:25,757 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:20:25,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 23:20:25,758 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)] === [2024-11-23 23:20:25,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:25,758 INFO L85 PathProgramCache]: Analyzing trace with hash -706351253, now seen corresponding path program 1 times [2024-11-23 23:20:25,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:25,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738727923] [2024-11-23 23:20:25,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:25,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:20:25,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:25,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738727923] [2024-11-23 23:20:25,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738727923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:20:25,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011419451] [2024-11-23 23:20:25,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:25,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:25,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:20:25,883 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:20:25,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:20:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:25,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 23:20:25,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:20:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:20:26,107 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:20:26,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011419451] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:26,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:20:26,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-23 23:20:26,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528443231] [2024-11-23 23:20:26,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:26,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:20:26,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:26,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:20:26,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:20:26,110 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) [2024-11-23 23:20:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:26,173 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2024-11-23 23:20:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:20:26,174 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 [2024-11-23 23:20:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:26,175 INFO L225 Difference]: With dead ends: 94 [2024-11-23 23:20:26,175 INFO L226 Difference]: Without dead ends: 94 [2024-11-23 23:20:26,176 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 [2024-11-23 23:20:26,179 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 [2024-11-23 23:20:26,179 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] [2024-11-23 23:20:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-23 23:20:26,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2024-11-23 23:20:26,193 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) [2024-11-23 23:20:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2024-11-23 23:20:26,194 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 12 [2024-11-23 23:20:26,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:26,197 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2024-11-23 23:20:26,198 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) [2024-11-23 23:20:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2024-11-23 23:20:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-23 23:20:26,199 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:26,199 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:20:26,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:20:26,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-23 23:20:26,400 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)] === [2024-11-23 23:20:26,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:26,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1099378263, now seen corresponding path program 1 times [2024-11-23 23:20:26,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:26,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446876622] [2024-11-23 23:20:26,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:26,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:20:26,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:26,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446876622] [2024-11-23 23:20:26,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446876622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:20:26,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944320510] [2024-11-23 23:20:26,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:26,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:26,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:20:26,923 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:20:26,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:20:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:27,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-23 23:20:27,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:20:27,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:20:27,115 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 [2024-11-23 23:20:27,129 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 [2024-11-23 23:20:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:20:27,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:20:27,731 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-23 23:20:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:20:27,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944320510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:20:27,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:20:27,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-23 23:20:27,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564193483] [2024-11-23 23:20:27,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:20:27,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:20:27,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:27,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:20:27,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:20:27,769 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) [2024-11-23 23:20:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:28,219 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2024-11-23 23:20:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:20:28,220 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 [2024-11-23 23:20:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:28,220 INFO L225 Difference]: With dead ends: 85 [2024-11-23 23:20:28,221 INFO L226 Difference]: Without dead ends: 85 [2024-11-23 23:20:28,221 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-11-23 23:20:28,222 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 32 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-11-23 23:20:28,222 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] [2024-11-23 23:20:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-23 23:20:28,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2024-11-23 23:20:28,228 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) [2024-11-23 23:20:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2024-11-23 23:20:28,229 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 12 [2024-11-23 23:20:28,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:28,230 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2024-11-23 23:20:28,230 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) [2024-11-23 23:20:28,230 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2024-11-23 23:20:28,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-23 23:20:28,231 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:28,231 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:20:28,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 23:20:28,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:28,435 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)] === [2024-11-23 23:20:28,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:28,436 INFO L85 PathProgramCache]: Analyzing trace with hash -196624046, now seen corresponding path program 1 times [2024-11-23 23:20:28,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:28,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713448402] [2024-11-23 23:20:28,436 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:28,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:28,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:28,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713448402] [2024-11-23 23:20:28,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713448402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:28,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:20:28,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:20:28,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121349415] [2024-11-23 23:20:28,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:28,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:20:28,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:28,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:20:28,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:20:28,502 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) [2024-11-23 23:20:28,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:28,569 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2024-11-23 23:20:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:20:28,570 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 [2024-11-23 23:20:28,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:28,571 INFO L225 Difference]: With dead ends: 80 [2024-11-23 23:20:28,571 INFO L226 Difference]: Without dead ends: 80 [2024-11-23 23:20:28,571 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:20:28,572 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:20:28,572 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 122 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:20:28,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-23 23:20:28,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-23 23:20:28,585 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) [2024-11-23 23:20:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2024-11-23 23:20:28,585 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 14 [2024-11-23 23:20:28,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:28,586 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2024-11-23 23:20:28,586 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) [2024-11-23 23:20:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2024-11-23 23:20:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-23 23:20:28,591 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:28,591 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:20:28,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 23:20:28,591 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)] === [2024-11-23 23:20:28,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:28,592 INFO L85 PathProgramCache]: Analyzing trace with hash -196624045, now seen corresponding path program 1 times [2024-11-23 23:20:28,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:28,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830893932] [2024-11-23 23:20:28,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:28,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:28,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:28,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830893932] [2024-11-23 23:20:28,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830893932] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:28,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:20:28,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:20:28,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333490939] [2024-11-23 23:20:28,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:28,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:20:28,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:28,868 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:20:28,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:20:28,869 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) [2024-11-23 23:20:29,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:29,066 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2024-11-23 23:20:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:20:29,066 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 [2024-11-23 23:20:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:29,067 INFO L225 Difference]: With dead ends: 106 [2024-11-23 23:20:29,067 INFO L226 Difference]: Without dead ends: 106 [2024-11-23 23:20:29,068 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 [2024-11-23 23:20:29,069 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 [2024-11-23 23:20:29,069 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] [2024-11-23 23:20:29,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-23 23:20:29,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2024-11-23 23:20:29,082 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) [2024-11-23 23:20:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2024-11-23 23:20:29,086 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 14 [2024-11-23 23:20:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:29,087 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2024-11-23 23:20:29,087 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) [2024-11-23 23:20:29,087 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2024-11-23 23:20:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-23 23:20:29,087 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:29,087 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:20:29,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-23 23:20:29,088 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)] === [2024-11-23 23:20:29,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:29,088 INFO L85 PathProgramCache]: Analyzing trace with hash 504440533, now seen corresponding path program 1 times [2024-11-23 23:20:29,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:29,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188748772] [2024-11-23 23:20:29,089 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:29,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:29,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:29,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188748772] [2024-11-23 23:20:29,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188748772] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:29,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:20:29,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:20:29,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325240395] [2024-11-23 23:20:29,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:29,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:20:29,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:29,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:20:29,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:20:29,391 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) [2024-11-23 23:20:29,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:29,512 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2024-11-23 23:20:29,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:20:29,513 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 [2024-11-23 23:20:29,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:29,514 INFO L225 Difference]: With dead ends: 99 [2024-11-23 23:20:29,514 INFO L226 Difference]: Without dead ends: 99 [2024-11-23 23:20:29,515 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 [2024-11-23 23:20:29,516 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 [2024-11-23 23:20:29,516 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] [2024-11-23 23:20:29,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-23 23:20:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2024-11-23 23:20:29,521 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) [2024-11-23 23:20:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2024-11-23 23:20:29,522 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 14 [2024-11-23 23:20:29,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:29,522 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2024-11-23 23:20:29,522 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) [2024-11-23 23:20:29,522 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2024-11-23 23:20:29,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-23 23:20:29,523 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:29,523 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:20:29,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 23:20:29,524 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)] === [2024-11-23 23:20:29,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:29,525 INFO L85 PathProgramCache]: Analyzing trace with hash 487237132, now seen corresponding path program 1 times [2024-11-23 23:20:29,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:29,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660525478] [2024-11-23 23:20:29,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:29,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:29,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:29,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660525478] [2024-11-23 23:20:29,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660525478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:20:29,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17582692] [2024-11-23 23:20:29,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:29,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:29,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:20:29,614 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:20:29,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:20:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:29,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 23:20:29,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:20:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:29,769 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:20:29,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17582692] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:29,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:20:29,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-23 23:20:29,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047580884] [2024-11-23 23:20:29,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:29,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:20:29,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:29,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:20:29,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:20:29,771 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) [2024-11-23 23:20:29,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:29,810 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2024-11-23 23:20:29,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:20:29,811 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 [2024-11-23 23:20:29,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:29,812 INFO L225 Difference]: With dead ends: 104 [2024-11-23 23:20:29,812 INFO L226 Difference]: Without dead ends: 104 [2024-11-23 23:20:29,812 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 [2024-11-23 23:20:29,813 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 [2024-11-23 23:20:29,813 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] [2024-11-23 23:20:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-23 23:20:29,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2024-11-23 23:20:29,821 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) [2024-11-23 23:20:29,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2024-11-23 23:20:29,822 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 18 [2024-11-23 23:20:29,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:29,822 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2024-11-23 23:20:29,823 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) [2024-11-23 23:20:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2024-11-23 23:20:29,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-23 23:20:29,826 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:29,827 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:20:29,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 23:20:30,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:30,031 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)] === [2024-11-23 23:20:30,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:30,032 INFO L85 PathProgramCache]: Analyzing trace with hash 487239310, now seen corresponding path program 1 times [2024-11-23 23:20:30,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:30,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450154806] [2024-11-23 23:20:30,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:30,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:30,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:30,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450154806] [2024-11-23 23:20:30,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450154806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:20:30,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947139930] [2024-11-23 23:20:30,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:30,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:30,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:20:30,259 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:20:30,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:20:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:30,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:20:30,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:20:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:30,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:20:30,583 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 [2024-11-23 23:20:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:30,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947139930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:20:30,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:20:30,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-23 23:20:30,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305176875] [2024-11-23 23:20:30,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:20:30,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 23:20:30,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:30,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 23:20:30,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:20:30,663 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) [2024-11-23 23:20:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:30,843 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2024-11-23 23:20:30,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:20:30,844 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 [2024-11-23 23:20:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:30,845 INFO L225 Difference]: With dead ends: 117 [2024-11-23 23:20:30,845 INFO L226 Difference]: Without dead ends: 117 [2024-11-23 23:20:30,845 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 [2024-11-23 23:20:30,846 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 [2024-11-23 23:20:30,847 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] [2024-11-23 23:20:30,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-23 23:20:30,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2024-11-23 23:20:30,856 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) [2024-11-23 23:20:30,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2024-11-23 23:20:30,857 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 18 [2024-11-23 23:20:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:30,857 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2024-11-23 23:20:30,857 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) [2024-11-23 23:20:30,857 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2024-11-23 23:20:30,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-23 23:20:30,858 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:30,858 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:20:30,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-23 23:20:31,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-23 23:20:31,059 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)] === [2024-11-23 23:20:31,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:31,059 INFO L85 PathProgramCache]: Analyzing trace with hash -792626546, now seen corresponding path program 1 times [2024-11-23 23:20:31,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:31,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550530471] [2024-11-23 23:20:31,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:31,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:31,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:31,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550530471] [2024-11-23 23:20:31,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550530471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:20:31,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512184144] [2024-11-23 23:20:31,418 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:31,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:31,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:20:31,420 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:20:31,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:20:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:31,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-23 23:20:31,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:20:31,537 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 [2024-11-23 23:20:31,550 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 [2024-11-23 23:20:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:31,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:20:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:32,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512184144] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:20:32,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:20:32,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-23 23:20:32,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091429662] [2024-11-23 23:20:32,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:20:32,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-23 23:20:32,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:32,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-23 23:20:32,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-11-23 23:20:32,294 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) [2024-11-23 23:20:32,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:32,598 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2024-11-23 23:20:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:20:32,599 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 [2024-11-23 23:20:32,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:32,601 INFO L225 Difference]: With dead ends: 117 [2024-11-23 23:20:32,601 INFO L226 Difference]: Without dead ends: 117 [2024-11-23 23:20:32,601 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 [2024-11-23 23:20:32,602 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 [2024-11-23 23:20:32,602 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] [2024-11-23 23:20:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-23 23:20:32,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 111. [2024-11-23 23:20:32,606 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) [2024-11-23 23:20:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2024-11-23 23:20:32,607 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 18 [2024-11-23 23:20:32,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:32,608 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2024-11-23 23:20:32,608 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) [2024-11-23 23:20:32,608 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2024-11-23 23:20:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-23 23:20:32,608 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:32,609 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:20:32,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-23 23:20:32,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:32,809 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)] === [2024-11-23 23:20:32,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:32,810 INFO L85 PathProgramCache]: Analyzing trace with hash -533829044, now seen corresponding path program 1 times [2024-11-23 23:20:32,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:32,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50640991] [2024-11-23 23:20:32,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:32,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:32,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:32,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50640991] [2024-11-23 23:20:32,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50640991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:32,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:20:32,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:20:32,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551128264] [2024-11-23 23:20:32,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:32,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:20:32,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:32,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:20:32,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:20:32,965 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) [2024-11-23 23:20:33,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:33,045 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2024-11-23 23:20:33,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:20:33,046 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 [2024-11-23 23:20:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:33,047 INFO L225 Difference]: With dead ends: 110 [2024-11-23 23:20:33,047 INFO L226 Difference]: Without dead ends: 110 [2024-11-23 23:20:33,047 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 [2024-11-23 23:20:33,047 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 [2024-11-23 23:20:33,048 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] [2024-11-23 23:20:33,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-23 23:20:33,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2024-11-23 23:20:33,052 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) [2024-11-23 23:20:33,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2024-11-23 23:20:33,053 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 18 [2024-11-23 23:20:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:33,053 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2024-11-23 23:20:33,053 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) [2024-11-23 23:20:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2024-11-23 23:20:33,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-23 23:20:33,056 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:33,056 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] [2024-11-23 23:20:33,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-23 23:20:33,056 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)] === [2024-11-23 23:20:33,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:33,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1643181139, now seen corresponding path program 1 times [2024-11-23 23:20:33,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:33,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997596201] [2024-11-23 23:20:33,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:33,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:33,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:33,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997596201] [2024-11-23 23:20:33,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997596201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:33,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:20:33,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:20:33,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875354429] [2024-11-23 23:20:33,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:33,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:20:33,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:33,111 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:20:33,111 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:20:33,111 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) [2024-11-23 23:20:33,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:33,162 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2024-11-23 23:20:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:20:33,163 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 [2024-11-23 23:20:33,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:33,163 INFO L225 Difference]: With dead ends: 95 [2024-11-23 23:20:33,163 INFO L226 Difference]: Without dead ends: 95 [2024-11-23 23:20:33,164 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 [2024-11-23 23:20:33,164 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 [2024-11-23 23:20:33,164 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] [2024-11-23 23:20:33,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-23 23:20:33,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-23 23:20:33,167 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) [2024-11-23 23:20:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2024-11-23 23:20:33,168 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 21 [2024-11-23 23:20:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:33,168 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2024-11-23 23:20:33,168 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) [2024-11-23 23:20:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2024-11-23 23:20:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-23 23:20:33,169 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:33,169 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] [2024-11-23 23:20:33,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 23:20:33,169 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)] === [2024-11-23 23:20:33,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:33,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1643181138, now seen corresponding path program 1 times [2024-11-23 23:20:33,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:33,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88604367] [2024-11-23 23:20:33,170 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:33,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:33,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:33,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88604367] [2024-11-23 23:20:33,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88604367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:20:33,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099094502] [2024-11-23 23:20:33,471 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:33,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:33,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:20:33,473 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:20:33,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 23:20:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:33,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:20:33,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:20:33,562 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 [2024-11-23 23:20:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:33,651 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:20:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:33,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099094502] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:20:33,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:20:33,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 13 [2024-11-23 23:20:33,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620556382] [2024-11-23 23:20:33,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:33,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:20:33,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:33,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:20:33,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:20:33,777 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) [2024-11-23 23:20:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:33,881 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2024-11-23 23:20:33,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:20:33,882 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 [2024-11-23 23:20:33,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:33,883 INFO L225 Difference]: With dead ends: 96 [2024-11-23 23:20:33,883 INFO L226 Difference]: Without dead ends: 96 [2024-11-23 23:20:33,883 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 [2024-11-23 23:20:33,884 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 [2024-11-23 23:20:33,884 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] [2024-11-23 23:20:33,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-23 23:20:33,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2024-11-23 23:20:33,887 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) [2024-11-23 23:20:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2024-11-23 23:20:33,888 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 21 [2024-11-23 23:20:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:33,888 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2024-11-23 23:20:33,888 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) [2024-11-23 23:20:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2024-11-23 23:20:33,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-23 23:20:33,889 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:33,889 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] [2024-11-23 23:20:33,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 23:20:34,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-23 23:20:34,094 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)] === [2024-11-23 23:20:34,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:34,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2027959735, now seen corresponding path program 1 times [2024-11-23 23:20:34,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:34,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80633521] [2024-11-23 23:20:34,094 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:34,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:34,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:34,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80633521] [2024-11-23 23:20:34,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80633521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:34,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:20:34,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:20:34,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900393415] [2024-11-23 23:20:34,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:34,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:20:34,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:34,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:20:34,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:20:34,185 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) [2024-11-23 23:20:34,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:34,273 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2024-11-23 23:20:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:20:34,274 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 [2024-11-23 23:20:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:34,275 INFO L225 Difference]: With dead ends: 93 [2024-11-23 23:20:34,275 INFO L226 Difference]: Without dead ends: 93 [2024-11-23 23:20:34,275 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 [2024-11-23 23:20:34,276 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 [2024-11-23 23:20:34,276 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] [2024-11-23 23:20:34,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-23 23:20:34,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-23 23:20:34,279 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) [2024-11-23 23:20:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2024-11-23 23:20:34,280 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 24 [2024-11-23 23:20:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:34,280 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2024-11-23 23:20:34,280 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) [2024-11-23 23:20:34,280 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2024-11-23 23:20:34,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-23 23:20:34,281 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:34,281 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] [2024-11-23 23:20:34,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-23 23:20:34,282 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)] === [2024-11-23 23:20:34,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:34,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2027959736, now seen corresponding path program 1 times [2024-11-23 23:20:34,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:34,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948321006] [2024-11-23 23:20:34,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:34,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:34,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:34,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948321006] [2024-11-23 23:20:34,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948321006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:20:34,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023728849] [2024-11-23 23:20:34,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:34,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:34,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:20:34,626 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:20:34,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 23:20:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:34,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-23 23:20:34,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:20:34,781 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 [2024-11-23 23:20:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:20:34,808 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:20:34,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023728849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:34,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:20:34,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 13 [2024-11-23 23:20:34,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408112831] [2024-11-23 23:20:34,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:34,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:20:34,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:34,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:20:34,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:20:34,809 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) [2024-11-23 23:20:34,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:34,874 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2024-11-23 23:20:34,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:20:34,875 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 [2024-11-23 23:20:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:34,876 INFO L225 Difference]: With dead ends: 100 [2024-11-23 23:20:34,876 INFO L226 Difference]: Without dead ends: 100 [2024-11-23 23:20:34,876 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 [2024-11-23 23:20:34,877 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 [2024-11-23 23:20:34,877 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] [2024-11-23 23:20:34,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-23 23:20:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-11-23 23:20:34,883 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) [2024-11-23 23:20:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2024-11-23 23:20:34,884 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 24 [2024-11-23 23:20:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:34,884 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2024-11-23 23:20:34,884 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) [2024-11-23 23:20:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2024-11-23 23:20:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-23 23:20:34,887 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:34,887 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] [2024-11-23 23:20:34,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 23:20:35,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-23 23:20:35,088 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)] === [2024-11-23 23:20:35,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:35,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1844305734, now seen corresponding path program 1 times [2024-11-23 23:20:35,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:35,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167450016] [2024-11-23 23:20:35,089 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:35,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:35,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:35,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167450016] [2024-11-23 23:20:35,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167450016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:20:35,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092607902] [2024-11-23 23:20:35,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:35,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:35,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:20:35,460 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:20:35,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 23:20:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:35,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-23 23:20:35,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:20:35,689 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 [2024-11-23 23:20:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:35,723 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:20:35,740 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 [2024-11-23 23:20:35,743 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 [2024-11-23 23:20:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:35,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092607902] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:20:35,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:20:35,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2024-11-23 23:20:35,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150774718] [2024-11-23 23:20:35,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:20:35,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-23 23:20:35,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:35,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-23 23:20:35,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-23 23:20:35,857 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) [2024-11-23 23:20:36,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:36,122 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2024-11-23 23:20:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:20:36,123 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 [2024-11-23 23:20:36,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:36,125 INFO L225 Difference]: With dead ends: 114 [2024-11-23 23:20:36,125 INFO L226 Difference]: Without dead ends: 114 [2024-11-23 23:20:36,126 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2024-11-23 23:20:36,126 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, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:20:36,127 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 713 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:20:36,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-23 23:20:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2024-11-23 23:20:36,131 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) [2024-11-23 23:20:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2024-11-23 23:20:36,132 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 24 [2024-11-23 23:20:36,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:36,133 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2024-11-23 23:20:36,133 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) [2024-11-23 23:20:36,133 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2024-11-23 23:20:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-23 23:20:36,134 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:36,134 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] [2024-11-23 23:20:36,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-23 23:20:36,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-23 23:20:36,338 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)] === [2024-11-23 23:20:36,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:36,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1042615402, now seen corresponding path program 1 times [2024-11-23 23:20:36,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:36,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069790916] [2024-11-23 23:20:36,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:36,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:20:36,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:36,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069790916] [2024-11-23 23:20:36,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069790916] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:36,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:20:36,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:20:36,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714277741] [2024-11-23 23:20:36,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:36,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:20:36,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:36,552 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:20:36,552 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:20:36,552 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) [2024-11-23 23:20:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:36,609 INFO L93 Difference]: Finished difference Result 103 states and 118 transitions. [2024-11-23 23:20:36,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:20:36,610 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 [2024-11-23 23:20:36,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:36,610 INFO L225 Difference]: With dead ends: 103 [2024-11-23 23:20:36,611 INFO L226 Difference]: Without dead ends: 74 [2024-11-23 23:20:36,611 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 [2024-11-23 23:20:36,612 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, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:20:36,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:20:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-23 23:20:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-23 23:20:36,620 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) [2024-11-23 23:20:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2024-11-23 23:20:36,621 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 26 [2024-11-23 23:20:36,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:36,621 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2024-11-23 23:20:36,621 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) [2024-11-23 23:20:36,621 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2024-11-23 23:20:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-23 23:20:36,621 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:36,622 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] [2024-11-23 23:20:36,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-23 23:20:36,622 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)] === [2024-11-23 23:20:36,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:36,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1744560435, now seen corresponding path program 2 times [2024-11-23 23:20:36,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:36,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644027429] [2024-11-23 23:20:36,623 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:20:36,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:36,641 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 23:20:36,641 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:20:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:20:37,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:37,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644027429] [2024-11-23 23:20:37,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644027429] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:37,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:20:37,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-23 23:20:37,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699610482] [2024-11-23 23:20:37,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:37,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 23:20:37,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:37,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 23:20:37,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:20:37,016 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) [2024-11-23 23:20:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:37,211 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2024-11-23 23:20:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:20:37,212 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 [2024-11-23 23:20:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:37,213 INFO L225 Difference]: With dead ends: 78 [2024-11-23 23:20:37,213 INFO L226 Difference]: Without dead ends: 78 [2024-11-23 23:20:37,213 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 [2024-11-23 23:20:37,215 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 [2024-11-23 23:20:37,215 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] [2024-11-23 23:20:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-23 23:20:37,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2024-11-23 23:20:37,219 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) [2024-11-23 23:20:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2024-11-23 23:20:37,220 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 28 [2024-11-23 23:20:37,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:37,220 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2024-11-23 23:20:37,221 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) [2024-11-23 23:20:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2024-11-23 23:20:37,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-23 23:20:37,221 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:37,221 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] [2024-11-23 23:20:37,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-23 23:20:37,222 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)] === [2024-11-23 23:20:37,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:37,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1199315790, now seen corresponding path program 1 times [2024-11-23 23:20:37,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:37,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852094289] [2024-11-23 23:20:37,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:37,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:37,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:37,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852094289] [2024-11-23 23:20:37,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852094289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:20:37,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975566146] [2024-11-23 23:20:37,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:37,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:37,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:20:37,780 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:20:37,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 23:20:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:37,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-23 23:20:37,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:20:38,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-23 23:20:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:38,049 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:20:38,071 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 [2024-11-23 23:20:38,073 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 [2024-11-23 23:20:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:38,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975566146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:20:38,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:20:38,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 21 [2024-11-23 23:20:38,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794448240] [2024-11-23 23:20:38,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:20:38,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-23 23:20:38,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:38,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-23 23:20:38,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:20:38,160 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) [2024-11-23 23:20:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:38,482 INFO L93 Difference]: Finished difference Result 127 states and 142 transitions. [2024-11-23 23:20:38,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:20:38,483 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 [2024-11-23 23:20:38,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:38,483 INFO L225 Difference]: With dead ends: 127 [2024-11-23 23:20:38,484 INFO L226 Difference]: Without dead ends: 127 [2024-11-23 23:20:38,484 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 [2024-11-23 23:20:38,487 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 [2024-11-23 23:20:38,487 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] [2024-11-23 23:20:38,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-23 23:20:38,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2024-11-23 23:20:38,495 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) [2024-11-23 23:20:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2024-11-23 23:20:38,495 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 31 [2024-11-23 23:20:38,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:38,495 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2024-11-23 23:20:38,496 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) [2024-11-23 23:20:38,496 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2024-11-23 23:20:38,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-23 23:20:38,496 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:38,496 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] [2024-11-23 23:20:38,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-23 23:20:38,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-23 23:20:38,701 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)] === [2024-11-23 23:20:38,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:38,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1077662685, now seen corresponding path program 1 times [2024-11-23 23:20:38,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:38,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266374527] [2024-11-23 23:20:38,702 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:38,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:20:38,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:38,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266374527] [2024-11-23 23:20:38,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266374527] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:20:38,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:20:38,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:20:38,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300003237] [2024-11-23 23:20:38,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:20:38,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:20:38,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:38,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:20:38,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:20:38,784 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) [2024-11-23 23:20:38,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:38,856 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2024-11-23 23:20:38,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:20:38,856 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 [2024-11-23 23:20:38,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:38,857 INFO L225 Difference]: With dead ends: 87 [2024-11-23 23:20:38,857 INFO L226 Difference]: Without dead ends: 87 [2024-11-23 23:20:38,857 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 [2024-11-23 23:20:38,858 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 41 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-11-23 23:20:38,858 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] [2024-11-23 23:20:38,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-23 23:20:38,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-23 23:20:38,861 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) [2024-11-23 23:20:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2024-11-23 23:20:38,862 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 34 [2024-11-23 23:20:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:38,862 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2024-11-23 23:20:38,862 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) [2024-11-23 23:20:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2024-11-23 23:20:38,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-23 23:20:38,863 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:38,863 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] [2024-11-23 23:20:38,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-23 23:20:38,863 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)] === [2024-11-23 23:20:38,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:38,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1077662686, now seen corresponding path program 1 times [2024-11-23 23:20:38,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:38,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815187493] [2024-11-23 23:20:38,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:38,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:20:39,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:39,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815187493] [2024-11-23 23:20:39,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815187493] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:20:39,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522884086] [2024-11-23 23:20:39,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:20:39,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:39,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:20:39,060 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:20:39,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 23:20:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:20:39,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-23 23:20:39,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:20:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:20:39,344 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:20:39,478 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 [2024-11-23 23:20:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:20:39,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522884086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:20:39,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:20:39,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-23 23:20:39,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456520395] [2024-11-23 23:20:39,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:20:39,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:20:39,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:39,499 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:20:39,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:20:39,500 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) [2024-11-23 23:20:39,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:39,650 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2024-11-23 23:20:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:20:39,654 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 [2024-11-23 23:20:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:39,654 INFO L225 Difference]: With dead ends: 93 [2024-11-23 23:20:39,654 INFO L226 Difference]: Without dead ends: 93 [2024-11-23 23:20:39,655 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 [2024-11-23 23:20:39,656 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 [2024-11-23 23:20:39,656 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] [2024-11-23 23:20:39,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-23 23:20:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2024-11-23 23:20:39,663 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) [2024-11-23 23:20:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2024-11-23 23:20:39,664 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 34 [2024-11-23 23:20:39,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:39,664 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2024-11-23 23:20:39,664 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) [2024-11-23 23:20:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2024-11-23 23:20:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-23 23:20:39,665 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:39,665 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] [2024-11-23 23:20:39,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-23 23:20:39,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-23 23:20:39,866 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)] === [2024-11-23 23:20:39,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:39,866 INFO L85 PathProgramCache]: Analyzing trace with hash 361781785, now seen corresponding path program 2 times [2024-11-23 23:20:39,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:39,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257255380] [2024-11-23 23:20:39,866 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:20:39,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:39,890 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:20:39,890 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:20:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:40,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:40,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257255380] [2024-11-23 23:20:40,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257255380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:20:40,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145072034] [2024-11-23 23:20:40,338 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:20:40,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:40,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:20:40,340 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:20:40,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 23:20:40,466 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:20:40,466 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:20:40,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-23 23:20:40,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:20:40,481 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 [2024-11-23 23:20:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:40,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:20:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:20:41,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145072034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:20:41,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:20:41,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-23 23:20:41,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44944911] [2024-11-23 23:20:41,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:20:41,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-23 23:20:41,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:41,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-23 23:20:41,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2024-11-23 23:20:41,157 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) [2024-11-23 23:20:41,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:41,976 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2024-11-23 23:20:41,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-23 23:20:41,977 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 [2024-11-23 23:20:41,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:41,978 INFO L225 Difference]: With dead ends: 137 [2024-11-23 23:20:41,978 INFO L226 Difference]: Without dead ends: 137 [2024-11-23 23:20:41,979 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 [2024-11-23 23:20:41,979 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, 0.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:20:41,980 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 999 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-23 23:20:41,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-23 23:20:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 93. [2024-11-23 23:20:41,985 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) [2024-11-23 23:20:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2024-11-23 23:20:41,987 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 35 [2024-11-23 23:20:41,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:41,987 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2024-11-23 23:20:41,987 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) [2024-11-23 23:20:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2024-11-23 23:20:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-23 23:20:41,989 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:41,989 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] [2024-11-23 23:20:41,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-23 23:20:42,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:42,193 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)] === [2024-11-23 23:20:42,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:42,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1768225292, now seen corresponding path program 3 times [2024-11-23 23:20:42,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:42,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386311587] [2024-11-23 23:20:42,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:20:42,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:42,242 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-23 23:20:42,242 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:20:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:20:42,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:42,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386311587] [2024-11-23 23:20:42,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386311587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:20:42,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140364007] [2024-11-23 23:20:42,808 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:20:42,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:42,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:20:42,810 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:20:42,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 23:20:42,925 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-23 23:20:42,925 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:20:42,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-23 23:20:42,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:20:43,063 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 [2024-11-23 23:20:47,756 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-23 23:20:47,756 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 [2024-11-23 23:20:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 1 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:20:47,854 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:20:48,695 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 [2024-11-23 23:20:48,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:20:48,702 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 [2024-11-23 23:20:48,714 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 [2024-11-23 23:20:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:20:49,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140364007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:20:49,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:20:49,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 34 [2024-11-23 23:20:49,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249502723] [2024-11-23 23:20:49,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:20:49,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-23 23:20:49,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:49,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-23 23:20:49,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1073, Unknown=1, NotChecked=0, Total=1190 [2024-11-23 23:20:49,171 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) [2024-11-23 23:21:12,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-23 23:21:21,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:21,841 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2024-11-23 23:21:21,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-23 23:21:21,842 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 [2024-11-23 23:21:21,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:21,843 INFO L225 Difference]: With dead ends: 96 [2024-11-23 23:21:21,843 INFO L226 Difference]: Without dead ends: 96 [2024-11-23 23:21:21,844 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=338, Invalid=2202, Unknown=10, NotChecked=0, Total=2550 [2024-11-23 23:21:21,845 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 292 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 9 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:21:21,845 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 772 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 806 Invalid, 5 Unknown, 0 Unchecked, 7.0s Time] [2024-11-23 23:21:21,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-23 23:21:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2024-11-23 23:21:21,848 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) [2024-11-23 23:21:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2024-11-23 23:21:21,849 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 38 [2024-11-23 23:21:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:21,849 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2024-11-23 23:21:21,849 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) [2024-11-23 23:21:21,849 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2024-11-23 23:21:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-23 23:21:21,850 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:21,850 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] [2024-11-23 23:21:21,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-23 23:21:22,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:22,054 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)] === [2024-11-23 23:21:22,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:22,054 INFO L85 PathProgramCache]: Analyzing trace with hash 939782569, now seen corresponding path program 1 times [2024-11-23 23:21:22,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:22,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936213119] [2024-11-23 23:21:22,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:22,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:22,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:22,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936213119] [2024-11-23 23:21:22,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936213119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:22,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696400130] [2024-11-23 23:21:22,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:22,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:22,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:22,344 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:22,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 23:21:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:22,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-23 23:21:22,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:22,498 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 [2024-11-23 23:21:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:21:22,543 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:21:22,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696400130] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:21:22,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:21:22,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 11 [2024-11-23 23:21:22,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530332955] [2024-11-23 23:21:22,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:21:22,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:21:22,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:22,545 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:21:22,545 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:21:22,545 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) [2024-11-23 23:21:22,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:22,614 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2024-11-23 23:21:22,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:21:22,615 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 [2024-11-23 23:21:22,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:22,615 INFO L225 Difference]: With dead ends: 128 [2024-11-23 23:21:22,615 INFO L226 Difference]: Without dead ends: 81 [2024-11-23 23:21:22,616 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 [2024-11-23 23:21:22,616 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 [2024-11-23 23:21:22,616 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] [2024-11-23 23:21:22,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-23 23:21:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-23 23:21:22,621 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) [2024-11-23 23:21:22,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2024-11-23 23:21:22,621 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 39 [2024-11-23 23:21:22,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:22,621 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2024-11-23 23:21:22,622 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) [2024-11-23 23:21:22,622 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2024-11-23 23:21:22,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-23 23:21:22,622 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:22,622 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] [2024-11-23 23:21:22,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-23 23:21:22,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:22,823 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)] === [2024-11-23 23:21:22,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:22,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1599314091, now seen corresponding path program 1 times [2024-11-23 23:21:22,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:22,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508309367] [2024-11-23 23:21:22,823 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:22,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:23,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:23,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508309367] [2024-11-23 23:21:23,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508309367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:23,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344338272] [2024-11-23 23:21:23,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:23,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:23,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:23,121 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:23,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 23:21:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:23,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-23 23:21:23,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:23,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-23 23:21:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:23,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:23,412 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 [2024-11-23 23:21:23,416 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 [2024-11-23 23:21:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:23,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344338272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:23,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:23,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-23 23:21:23,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172708420] [2024-11-23 23:21:23,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:23,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-23 23:21:23,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:23,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-23 23:21:23,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-23 23:21:23,508 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) [2024-11-23 23:21:23,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:23,648 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2024-11-23 23:21:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 23:21:23,649 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 [2024-11-23 23:21:23,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:23,650 INFO L225 Difference]: With dead ends: 128 [2024-11-23 23:21:23,650 INFO L226 Difference]: Without dead ends: 88 [2024-11-23 23:21:23,650 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 [2024-11-23 23:21:23,650 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 [2024-11-23 23:21:23,650 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] [2024-11-23 23:21:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-23 23:21:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2024-11-23 23:21:23,652 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) [2024-11-23 23:21:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2024-11-23 23:21:23,657 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 39 [2024-11-23 23:21:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:23,660 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2024-11-23 23:21:23,661 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) [2024-11-23 23:21:23,661 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2024-11-23 23:21:23,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-23 23:21:23,661 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:23,662 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] [2024-11-23 23:21:23,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-23 23:21:23,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-23 23:21:23,866 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)] === [2024-11-23 23:21:23,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:23,867 INFO L85 PathProgramCache]: Analyzing trace with hash 132135122, now seen corresponding path program 2 times [2024-11-23 23:21:23,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:23,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806734296] [2024-11-23 23:21:23,867 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:21:23,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:23,884 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:21:23,885 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:24,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:24,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806734296] [2024-11-23 23:21:24,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806734296] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:24,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237312247] [2024-11-23 23:21:24,234 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:21:24,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:24,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:24,236 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:24,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 23:21:24,360 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:21:24,361 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:24,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-23 23:21:24,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:24,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:24,777 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 [2024-11-23 23:21:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:24,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237312247] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:24,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:24,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-23 23:21:24,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386515410] [2024-11-23 23:21:24,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:24,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-23 23:21:24,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:24,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-23 23:21:24,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:21:24,850 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) [2024-11-23 23:21:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:25,246 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2024-11-23 23:21:25,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 23:21:25,247 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 [2024-11-23 23:21:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:25,247 INFO L225 Difference]: With dead ends: 119 [2024-11-23 23:21:25,247 INFO L226 Difference]: Without dead ends: 119 [2024-11-23 23:21:25,248 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 [2024-11-23 23:21:25,248 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 89 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-11-23 23:21:25,248 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] [2024-11-23 23:21:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-23 23:21:25,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 107. [2024-11-23 23:21:25,254 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) [2024-11-23 23:21:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2024-11-23 23:21:25,255 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 43 [2024-11-23 23:21:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:25,255 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2024-11-23 23:21:25,256 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) [2024-11-23 23:21:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2024-11-23 23:21:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-23 23:21:25,256 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:25,256 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] [2024-11-23 23:21:25,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-23 23:21:25,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-23 23:21:25,461 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)] === [2024-11-23 23:21:25,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:25,461 INFO L85 PathProgramCache]: Analyzing trace with hash -198699902, now seen corresponding path program 1 times [2024-11-23 23:21:25,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:25,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044586341] [2024-11-23 23:21:25,462 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:25,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 23:21:25,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:25,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044586341] [2024-11-23 23:21:25,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044586341] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:21:25,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:21:25,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:21:25,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661173245] [2024-11-23 23:21:25,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:21:25,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:21:25,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:25,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:21:25,553 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:21:25,554 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) [2024-11-23 23:21:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:25,624 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2024-11-23 23:21:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:21:25,624 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 [2024-11-23 23:21:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:25,625 INFO L225 Difference]: With dead ends: 107 [2024-11-23 23:21:25,625 INFO L226 Difference]: Without dead ends: 107 [2024-11-23 23:21:25,625 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 [2024-11-23 23:21:25,626 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 [2024-11-23 23:21:25,626 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] [2024-11-23 23:21:25,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-23 23:21:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-11-23 23:21:25,629 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) [2024-11-23 23:21:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2024-11-23 23:21:25,629 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 44 [2024-11-23 23:21:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:25,629 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2024-11-23 23:21:25,630 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) [2024-11-23 23:21:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2024-11-23 23:21:25,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-23 23:21:25,630 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:25,630 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] [2024-11-23 23:21:25,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-23 23:21:25,630 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)] === [2024-11-23 23:21:25,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:25,631 INFO L85 PathProgramCache]: Analyzing trace with hash -198699901, now seen corresponding path program 1 times [2024-11-23 23:21:25,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:25,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633479517] [2024-11-23 23:21:25,631 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:25,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:25,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:25,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633479517] [2024-11-23 23:21:25,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633479517] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:25,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625839822] [2024-11-23 23:21:25,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:25,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:25,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:25,923 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:25,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 23:21:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:26,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-23 23:21:26,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:26,230 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:26,506 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 [2024-11-23 23:21:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:26,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625839822] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:26,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:26,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-23 23:21:26,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145198458] [2024-11-23 23:21:26,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:26,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-23 23:21:26,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:26,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-23 23:21:26,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-23 23:21:26,542 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) [2024-11-23 23:21:26,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:26,942 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2024-11-23 23:21:26,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 23:21:26,942 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 [2024-11-23 23:21:26,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:26,943 INFO L225 Difference]: With dead ends: 121 [2024-11-23 23:21:26,943 INFO L226 Difference]: Without dead ends: 121 [2024-11-23 23:21:26,943 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-23 23:21:26,944 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 [2024-11-23 23:21:26,944 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] [2024-11-23 23:21:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-23 23:21:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2024-11-23 23:21:26,951 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) [2024-11-23 23:21:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2024-11-23 23:21:26,951 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 44 [2024-11-23 23:21:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:26,951 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2024-11-23 23:21:26,952 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) [2024-11-23 23:21:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2024-11-23 23:21:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-23 23:21:26,952 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:26,952 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] [2024-11-23 23:21:26,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-23 23:21:27,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-23 23:21:27,153 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)] === [2024-11-23 23:21:27,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:27,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1972041853, now seen corresponding path program 1 times [2024-11-23 23:21:27,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:27,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669409718] [2024-11-23 23:21:27,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:27,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 23:21:27,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:27,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669409718] [2024-11-23 23:21:27,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669409718] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:21:27,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:21:27,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:21:27,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520699798] [2024-11-23 23:21:27,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:21:27,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:21:27,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:27,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:21:27,253 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:21:27,253 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) [2024-11-23 23:21:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:27,346 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2024-11-23 23:21:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:21:27,346 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 [2024-11-23 23:21:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:27,347 INFO L225 Difference]: With dead ends: 106 [2024-11-23 23:21:27,347 INFO L226 Difference]: Without dead ends: 106 [2024-11-23 23:21:27,347 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 [2024-11-23 23:21:27,348 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 [2024-11-23 23:21:27,349 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] [2024-11-23 23:21:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-23 23:21:27,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2024-11-23 23:21:27,352 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) [2024-11-23 23:21:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2024-11-23 23:21:27,353 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 46 [2024-11-23 23:21:27,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:27,353 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2024-11-23 23:21:27,353 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) [2024-11-23 23:21:27,353 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2024-11-23 23:21:27,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-23 23:21:27,354 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:27,354 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] [2024-11-23 23:21:27,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-23 23:21:27,354 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)] === [2024-11-23 23:21:27,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:27,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1972041852, now seen corresponding path program 1 times [2024-11-23 23:21:27,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:27,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622770184] [2024-11-23 23:21:27,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:27,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:27,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:27,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622770184] [2024-11-23 23:21:27,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622770184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:27,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401021287] [2024-11-23 23:21:27,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:27,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:27,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:27,704 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:27,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 23:21:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:27,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-23 23:21:27,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:27,852 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 [2024-11-23 23:21:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:28,040 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:28,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401021287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:28,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:28,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2024-11-23 23:21:28,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604986151] [2024-11-23 23:21:28,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:28,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-23 23:21:28,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:28,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-23 23:21:28,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-11-23 23:21:28,323 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) [2024-11-23 23:21:28,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:28,655 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2024-11-23 23:21:28,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 23:21:28,656 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 [2024-11-23 23:21:28,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:28,656 INFO L225 Difference]: With dead ends: 112 [2024-11-23 23:21:28,656 INFO L226 Difference]: Without dead ends: 112 [2024-11-23 23:21:28,657 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 [2024-11-23 23:21:28,657 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 [2024-11-23 23:21:28,658 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] [2024-11-23 23:21:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-23 23:21:28,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2024-11-23 23:21:28,660 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) [2024-11-23 23:21:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2024-11-23 23:21:28,660 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 46 [2024-11-23 23:21:28,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:28,661 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2024-11-23 23:21:28,661 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) [2024-11-23 23:21:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2024-11-23 23:21:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-23 23:21:28,661 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:28,661 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] [2024-11-23 23:21:28,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-23 23:21:28,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-23 23:21:28,866 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)] === [2024-11-23 23:21:28,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:28,866 INFO L85 PathProgramCache]: Analyzing trace with hash -606304971, now seen corresponding path program 3 times [2024-11-23 23:21:28,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:28,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796595662] [2024-11-23 23:21:28,866 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:21:28,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:28,910 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-23 23:21:28,910 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:29,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796595662] [2024-11-23 23:21:29,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796595662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010382191] [2024-11-23 23:21:29,416 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:21:29,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:29,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:29,420 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:29,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-23 23:21:29,562 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-23 23:21:29,562 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:29,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-23 23:21:29,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:29,707 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 [2024-11-23 23:21:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:29,788 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:29,829 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 [2024-11-23 23:21:29,831 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 [2024-11-23 23:21:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:29,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010382191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:29,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:29,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 23 [2024-11-23 23:21:29,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510311192] [2024-11-23 23:21:29,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:29,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-23 23:21:29,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:29,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-23 23:21:29,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2024-11-23 23:21:29,949 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) [2024-11-23 23:21:30,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:30,278 INFO L93 Difference]: Finished difference Result 187 states and 216 transitions. [2024-11-23 23:21:30,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-23 23:21:30,279 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 [2024-11-23 23:21:30,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:30,279 INFO L225 Difference]: With dead ends: 187 [2024-11-23 23:21:30,280 INFO L226 Difference]: Without dead ends: 178 [2024-11-23 23:21:30,280 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 [2024-11-23 23:21:30,280 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 [2024-11-23 23:21:30,281 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] [2024-11-23 23:21:30,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-23 23:21:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 169. [2024-11-23 23:21:30,287 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) [2024-11-23 23:21:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2024-11-23 23:21:30,289 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 48 [2024-11-23 23:21:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:30,289 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2024-11-23 23:21:30,289 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) [2024-11-23 23:21:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2024-11-23 23:21:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-23 23:21:30,290 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:30,290 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] [2024-11-23 23:21:30,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-23 23:21:30,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:30,494 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)] === [2024-11-23 23:21:30,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:30,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1051639740, now seen corresponding path program 1 times [2024-11-23 23:21:30,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:30,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702988991] [2024-11-23 23:21:30,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:30,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 23:21:30,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:30,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702988991] [2024-11-23 23:21:30,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702988991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:21:30,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:21:30,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:21:30,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146310494] [2024-11-23 23:21:30,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:21:30,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:21:30,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:30,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:21:30,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:21:30,631 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) [2024-11-23 23:21:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:30,724 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2024-11-23 23:21:30,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:21:30,725 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 [2024-11-23 23:21:30,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:30,726 INFO L225 Difference]: With dead ends: 170 [2024-11-23 23:21:30,726 INFO L226 Difference]: Without dead ends: 170 [2024-11-23 23:21:30,726 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 [2024-11-23 23:21:30,726 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 [2024-11-23 23:21:30,727 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] [2024-11-23 23:21:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-23 23:21:30,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2024-11-23 23:21:30,733 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) [2024-11-23 23:21:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2024-11-23 23:21:30,734 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 48 [2024-11-23 23:21:30,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:30,734 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2024-11-23 23:21:30,734 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) [2024-11-23 23:21:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2024-11-23 23:21:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-23 23:21:30,735 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:30,735 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] [2024-11-23 23:21:30,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-23 23:21:30,735 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)] === [2024-11-23 23:21:30,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1051639739, now seen corresponding path program 1 times [2024-11-23 23:21:30,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:30,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183717373] [2024-11-23 23:21:30,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:30,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:31,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:31,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183717373] [2024-11-23 23:21:31,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183717373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:31,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900345607] [2024-11-23 23:21:31,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:31,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:31,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:31,037 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:31,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-23 23:21:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:31,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-23 23:21:31,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:31,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:31,721 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 [2024-11-23 23:21:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:31,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900345607] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:31,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:31,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-23 23:21:31,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293446895] [2024-11-23 23:21:31,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:31,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-23 23:21:31,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:31,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-23 23:21:31,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:21:31,765 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) [2024-11-23 23:21:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:32,269 INFO L93 Difference]: Finished difference Result 178 states and 203 transitions. [2024-11-23 23:21:32,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:21:32,270 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 [2024-11-23 23:21:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:32,271 INFO L225 Difference]: With dead ends: 178 [2024-11-23 23:21:32,271 INFO L226 Difference]: Without dead ends: 178 [2024-11-23 23:21:32,271 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 [2024-11-23 23:21:32,271 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 115 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:21:32,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 445 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 23:21:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-23 23:21:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 167. [2024-11-23 23:21:32,275 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) [2024-11-23 23:21:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 194 transitions. [2024-11-23 23:21:32,276 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 194 transitions. Word has length 48 [2024-11-23 23:21:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:32,276 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 194 transitions. [2024-11-23 23:21:32,276 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) [2024-11-23 23:21:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 194 transitions. [2024-11-23 23:21:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-23 23:21:32,277 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:32,277 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] [2024-11-23 23:21:32,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-23 23:21:32,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:32,478 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)] === [2024-11-23 23:21:32,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:32,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1308779835, now seen corresponding path program 1 times [2024-11-23 23:21:32,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:32,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236813686] [2024-11-23 23:21:32,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:32,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 23:21:32,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:32,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236813686] [2024-11-23 23:21:32,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236813686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:21:32,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:21:32,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:21:32,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503756554] [2024-11-23 23:21:32,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:21:32,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:21:32,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:32,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:21:32,591 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:21:32,591 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) [2024-11-23 23:21:32,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:32,678 INFO L93 Difference]: Finished difference Result 168 states and 193 transitions. [2024-11-23 23:21:32,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:21:32,679 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 [2024-11-23 23:21:32,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:32,680 INFO L225 Difference]: With dead ends: 168 [2024-11-23 23:21:32,680 INFO L226 Difference]: Without dead ends: 168 [2024-11-23 23:21:32,680 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 [2024-11-23 23:21:32,680 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 [2024-11-23 23:21:32,680 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] [2024-11-23 23:21:32,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-23 23:21:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2024-11-23 23:21:32,684 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) [2024-11-23 23:21:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 191 transitions. [2024-11-23 23:21:32,685 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 191 transitions. Word has length 50 [2024-11-23 23:21:32,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:32,686 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 191 transitions. [2024-11-23 23:21:32,686 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) [2024-11-23 23:21:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 191 transitions. [2024-11-23 23:21:32,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-23 23:21:32,688 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:32,688 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] [2024-11-23 23:21:32,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-23 23:21:32,689 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)] === [2024-11-23 23:21:32,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:32,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1308779834, now seen corresponding path program 1 times [2024-11-23 23:21:32,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:32,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127996344] [2024-11-23 23:21:32,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:32,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:33,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:33,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127996344] [2024-11-23 23:21:33,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127996344] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:33,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026668266] [2024-11-23 23:21:33,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:33,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:33,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:33,167 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:33,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-23 23:21:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:33,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-23 23:21:33,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:33,334 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 [2024-11-23 23:21:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:33,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:21:33,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026668266] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:33,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:33,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2024-11-23 23:21:33,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227526219] [2024-11-23 23:21:33,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:33,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-23 23:21:33,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:33,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-23 23:21:33,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2024-11-23 23:21:33,923 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) [2024-11-23 23:21:34,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:34,484 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2024-11-23 23:21:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 23:21:34,485 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 [2024-11-23 23:21:34,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:34,486 INFO L225 Difference]: With dead ends: 201 [2024-11-23 23:21:34,488 INFO L226 Difference]: Without dead ends: 198 [2024-11-23 23:21:34,489 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2024-11-23 23:21:34,489 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, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:21:34,489 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 461 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 23:21:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-23 23:21:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 175. [2024-11-23 23:21:34,501 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) [2024-11-23 23:21:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 202 transitions. [2024-11-23 23:21:34,503 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 202 transitions. Word has length 50 [2024-11-23 23:21:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:34,503 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 202 transitions. [2024-11-23 23:21:34,503 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) [2024-11-23 23:21:34,503 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 202 transitions. [2024-11-23 23:21:34,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-23 23:21:34,507 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:34,508 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] [2024-11-23 23:21:34,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-23 23:21:34,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-23 23:21:34,708 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)] === [2024-11-23 23:21:34,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:34,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1907922061, now seen corresponding path program 1 times [2024-11-23 23:21:34,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:34,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517762858] [2024-11-23 23:21:34,709 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:34,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-23 23:21:34,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:34,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517762858] [2024-11-23 23:21:34,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517762858] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:21:34,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:21:34,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:21:34,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452349780] [2024-11-23 23:21:34,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:21:34,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:21:34,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:34,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:21:34,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:21:34,930 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) [2024-11-23 23:21:34,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:34,991 INFO L93 Difference]: Finished difference Result 217 states and 247 transitions. [2024-11-23 23:21:34,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:21:34,992 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 [2024-11-23 23:21:34,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:34,993 INFO L225 Difference]: With dead ends: 217 [2024-11-23 23:21:34,993 INFO L226 Difference]: Without dead ends: 198 [2024-11-23 23:21:34,993 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:21:34,994 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 [2024-11-23 23:21:34,995 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] [2024-11-23 23:21:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-23 23:21:34,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2024-11-23 23:21:34,999 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) [2024-11-23 23:21:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 225 transitions. [2024-11-23 23:21:35,000 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 225 transitions. Word has length 51 [2024-11-23 23:21:35,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:35,000 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 225 transitions. [2024-11-23 23:21:35,000 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) [2024-11-23 23:21:35,001 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 225 transitions. [2024-11-23 23:21:35,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-23 23:21:35,001 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:35,001 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] [2024-11-23 23:21:35,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-11-23 23:21:35,002 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)] === [2024-11-23 23:21:35,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:35,002 INFO L85 PathProgramCache]: Analyzing trace with hash 783556846, now seen corresponding path program 4 times [2024-11-23 23:21:35,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:35,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436690970] [2024-11-23 23:21:35,003 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:21:35,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:35,022 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:21:35,022 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:21:35,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:35,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436690970] [2024-11-23 23:21:35,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436690970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:35,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434942001] [2024-11-23 23:21:35,975 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:21:35,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:35,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:35,976 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:35,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-23 23:21:36,124 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:21:36,124 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:36,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-23 23:21:36,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:36,325 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 [2024-11-23 23:21:37,143 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-11-23 23:21:37,143 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 [2024-11-23 23:21:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:21:37,318 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:38,224 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 [2024-11-23 23:21:38,229 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 [2024-11-23 23:21:38,709 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 [2024-11-23 23:21:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:21:38,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434942001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:38,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:38,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 44 [2024-11-23 23:21:38,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328533592] [2024-11-23 23:21:38,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:38,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-23 23:21:38,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:38,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-23 23:21:38,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2024-11-23 23:21:38,728 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) [2024-11-23 23:21:39,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:39,650 INFO L93 Difference]: Finished difference Result 197 states and 223 transitions. [2024-11-23 23:21:39,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-23 23:21:39,650 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 [2024-11-23 23:21:39,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:39,651 INFO L225 Difference]: With dead ends: 197 [2024-11-23 23:21:39,651 INFO L226 Difference]: Without dead ends: 163 [2024-11-23 23:21:39,652 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=319, Invalid=2543, Unknown=0, NotChecked=0, Total=2862 [2024-11-23 23:21:39,653 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 164 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2024-11-23 23:21:39,653 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] [2024-11-23 23:21:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-23 23:21:39,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 137. [2024-11-23 23:21:39,656 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) [2024-11-23 23:21:39,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2024-11-23 23:21:39,657 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 52 [2024-11-23 23:21:39,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:39,657 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2024-11-23 23:21:39,657 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) [2024-11-23 23:21:39,657 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2024-11-23 23:21:39,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-23 23:21:39,658 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:39,658 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] [2024-11-23 23:21:39,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-23 23:21:39,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-23 23:21:39,858 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)] === [2024-11-23 23:21:39,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:39,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1275387995, now seen corresponding path program 1 times [2024-11-23 23:21:39,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:39,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903636920] [2024-11-23 23:21:39,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:39,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:21:40,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:40,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903636920] [2024-11-23 23:21:40,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903636920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:40,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036435260] [2024-11-23 23:21:40,019 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:40,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:40,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:40,021 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:40,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-23 23:21:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:40,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-23 23:21:40,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:40,300 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 [2024-11-23 23:21:40,321 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 [2024-11-23 23:21:40,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-23 23:21:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-23 23:21:40,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:40,962 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 [2024-11-23 23:21:40,967 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 [2024-11-23 23:21:40,968 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 [2024-11-23 23:21:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-23 23:21:41,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036435260] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:41,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:41,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 18] total 35 [2024-11-23 23:21:41,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934205261] [2024-11-23 23:21:41,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:41,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-23 23:21:41,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:41,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-23 23:21:41,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2024-11-23 23:21:41,101 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) [2024-11-23 23:21:42,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:42,398 INFO L93 Difference]: Finished difference Result 188 states and 207 transitions. [2024-11-23 23:21:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-23 23:21:42,398 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 [2024-11-23 23:21:42,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:42,399 INFO L225 Difference]: With dead ends: 188 [2024-11-23 23:21:42,399 INFO L226 Difference]: Without dead ends: 130 [2024-11-23 23:21:42,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=245, Invalid=2511, Unknown=0, NotChecked=0, Total=2756 [2024-11-23 23:21:42,400 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 [2024-11-23 23:21:42,400 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] [2024-11-23 23:21:42,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-23 23:21:42,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2024-11-23 23:21:42,403 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) [2024-11-23 23:21:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 141 transitions. [2024-11-23 23:21:42,404 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 141 transitions. Word has length 58 [2024-11-23 23:21:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:42,404 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 141 transitions. [2024-11-23 23:21:42,404 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) [2024-11-23 23:21:42,404 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 141 transitions. [2024-11-23 23:21:42,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-23 23:21:42,405 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:42,405 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] [2024-11-23 23:21:42,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-23 23:21:42,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-23 23:21:42,605 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)] === [2024-11-23 23:21:42,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:42,606 INFO L85 PathProgramCache]: Analyzing trace with hash 555464225, now seen corresponding path program 1 times [2024-11-23 23:21:42,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:42,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320657890] [2024-11-23 23:21:42,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:42,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-23 23:21:42,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:42,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320657890] [2024-11-23 23:21:42,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320657890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:42,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114779734] [2024-11-23 23:21:42,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:42,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:42,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:42,964 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:42,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-23 23:21:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:43,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-23 23:21:43,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-23 23:21:43,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:43,790 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 [2024-11-23 23:21:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-23 23:21:43,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114779734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:43,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:43,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-11-23 23:21:43,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995216634] [2024-11-23 23:21:43,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:43,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-23 23:21:43,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:43,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-23 23:21:43,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-11-23 23:21:43,866 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) [2024-11-23 23:21:44,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:44,333 INFO L93 Difference]: Finished difference Result 221 states and 254 transitions. [2024-11-23 23:21:44,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:21:44,334 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 [2024-11-23 23:21:44,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:44,335 INFO L225 Difference]: With dead ends: 221 [2024-11-23 23:21:44,335 INFO L226 Difference]: Without dead ends: 221 [2024-11-23 23:21:44,335 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 [2024-11-23 23:21:44,335 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 [2024-11-23 23:21:44,335 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] [2024-11-23 23:21:44,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-23 23:21:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 174. [2024-11-23 23:21:44,339 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) [2024-11-23 23:21:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 204 transitions. [2024-11-23 23:21:44,340 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 204 transitions. Word has length 60 [2024-11-23 23:21:44,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:44,340 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 204 transitions. [2024-11-23 23:21:44,340 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) [2024-11-23 23:21:44,341 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 204 transitions. [2024-11-23 23:21:44,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-23 23:21:44,341 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:44,341 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] [2024-11-23 23:21:44,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-23 23:21:44,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-23 23:21:44,546 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)] === [2024-11-23 23:21:44,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:44,546 INFO L85 PathProgramCache]: Analyzing trace with hash 2014323617, now seen corresponding path program 2 times [2024-11-23 23:21:44,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:44,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622180882] [2024-11-23 23:21:44,546 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:21:44,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:44,585 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:21:44,585 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-23 23:21:44,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:44,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622180882] [2024-11-23 23:21:44,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622180882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:44,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944760970] [2024-11-23 23:21:44,973 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:21:44,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:44,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:44,975 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:44,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-23 23:21:45,152 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:21:45,153 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:45,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-23 23:21:45,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-23 23:21:45,479 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:45,721 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 [2024-11-23 23:21:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-23 23:21:45,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944760970] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:45,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:45,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-23 23:21:45,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227968221] [2024-11-23 23:21:45,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:45,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-23 23:21:45,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:45,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-23 23:21:45,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2024-11-23 23:21:45,926 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) [2024-11-23 23:21:46,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:46,356 INFO L93 Difference]: Finished difference Result 192 states and 222 transitions. [2024-11-23 23:21:46,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-23 23:21:46,356 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 [2024-11-23 23:21:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:46,357 INFO L225 Difference]: With dead ends: 192 [2024-11-23 23:21:46,357 INFO L226 Difference]: Without dead ends: 192 [2024-11-23 23:21:46,358 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 [2024-11-23 23:21:46,358 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 126 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-11-23 23:21:46,358 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] [2024-11-23 23:21:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-23 23:21:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 178. [2024-11-23 23:21:46,362 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) [2024-11-23 23:21:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 210 transitions. [2024-11-23 23:21:46,362 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 210 transitions. Word has length 65 [2024-11-23 23:21:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:46,363 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 210 transitions. [2024-11-23 23:21:46,363 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) [2024-11-23 23:21:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 210 transitions. [2024-11-23 23:21:46,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-23 23:21:46,364 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:46,364 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] [2024-11-23 23:21:46,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-23 23:21:46,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-23 23:21:46,564 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)] === [2024-11-23 23:21:46,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:46,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1551631778, now seen corresponding path program 2 times [2024-11-23 23:21:46,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:46,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433780283] [2024-11-23 23:21:46,565 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:21:46,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:46,597 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:21:46,597 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-23 23:21:47,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:47,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433780283] [2024-11-23 23:21:47,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433780283] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:47,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710672464] [2024-11-23 23:21:47,266 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:21:47,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:47,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:47,268 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:47,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-23 23:21:47,443 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:21:47,443 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:47,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-23 23:21:47,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:47,615 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 [2024-11-23 23:21:47,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:21:47,847 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 [2024-11-23 23:21:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:21:48,172 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:48,677 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-23 23:21:48,678 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 [2024-11-23 23:21:48,687 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 [2024-11-23 23:21:48,689 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 [2024-11-23 23:21:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:21:48,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710672464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:48,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:48,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 20] total 45 [2024-11-23 23:21:48,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432685722] [2024-11-23 23:21:48,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:48,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-23 23:21:48,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:48,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-23 23:21:48,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1842, Unknown=0, NotChecked=0, Total=1980 [2024-11-23 23:21:48,836 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) [2024-11-23 23:21:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:51,287 INFO L93 Difference]: Finished difference Result 442 states and 508 transitions. [2024-11-23 23:21:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-23 23:21:51,288 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 [2024-11-23 23:21:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:51,290 INFO L225 Difference]: With dead ends: 442 [2024-11-23 23:21:51,290 INFO L226 Difference]: Without dead ends: 378 [2024-11-23 23:21:51,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=385, Invalid=4727, Unknown=0, NotChecked=0, Total=5112 [2024-11-23 23:21:51,291 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 802 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:21:51,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 1375 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-23 23:21:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2024-11-23 23:21:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 319. [2024-11-23 23:21:51,298 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) [2024-11-23 23:21:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 380 transitions. [2024-11-23 23:21:51,299 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 380 transitions. Word has length 65 [2024-11-23 23:21:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:51,300 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 380 transitions. [2024-11-23 23:21:51,300 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) [2024-11-23 23:21:51,300 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 380 transitions. [2024-11-23 23:21:51,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-23 23:21:51,301 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:51,301 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] [2024-11-23 23:21:51,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-23 23:21:51,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-23 23:21:51,502 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)] === [2024-11-23 23:21:51,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:51,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1265252574, now seen corresponding path program 1 times [2024-11-23 23:21:51,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:51,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339255030] [2024-11-23 23:21:51,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:51,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-23 23:21:52,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:52,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339255030] [2024-11-23 23:21:52,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339255030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:52,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288530600] [2024-11-23 23:21:52,029 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:52,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:52,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:52,032 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:52,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-23 23:21:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:52,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-23 23:21:52,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:52,218 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 [2024-11-23 23:21:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-23 23:21:52,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-23 23:21:52,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288530600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:52,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:52,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2024-11-23 23:21:52,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505655215] [2024-11-23 23:21:52,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:52,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-23 23:21:52,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:52,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-23 23:21:52,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2024-11-23 23:21:52,830 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) [2024-11-23 23:21:53,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:53,494 INFO L93 Difference]: Finished difference Result 417 states and 499 transitions. [2024-11-23 23:21:53,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-23 23:21:53,494 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 [2024-11-23 23:21:53,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:53,496 INFO L225 Difference]: With dead ends: 417 [2024-11-23 23:21:53,496 INFO L226 Difference]: Without dead ends: 417 [2024-11-23 23:21:53,497 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 [2024-11-23 23:21:53,497 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 [2024-11-23 23:21:53,497 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] [2024-11-23 23:21:53,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2024-11-23 23:21:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 376. [2024-11-23 23:21:53,505 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) [2024-11-23 23:21:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 462 transitions. [2024-11-23 23:21:53,507 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 462 transitions. Word has length 67 [2024-11-23 23:21:53,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:53,507 INFO L471 AbstractCegarLoop]: Abstraction has 376 states and 462 transitions. [2024-11-23 23:21:53,507 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) [2024-11-23 23:21:53,507 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 462 transitions. [2024-11-23 23:21:53,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-23 23:21:53,508 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:53,508 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] [2024-11-23 23:21:53,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-23 23:21:53,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:53,713 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)] === [2024-11-23 23:21:53,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:53,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1961371288, now seen corresponding path program 1 times [2024-11-23 23:21:53,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:53,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017765575] [2024-11-23 23:21:53,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:53,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:21:54,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:54,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017765575] [2024-11-23 23:21:54,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017765575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:54,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825138033] [2024-11-23 23:21:54,308 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:21:54,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:54,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:54,309 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:54,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-23 23:21:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:54,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-23 23:21:54,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:54,665 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 [2024-11-23 23:21:54,831 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:21:54,831 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:54,857 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 [2024-11-23 23:21:54,860 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 [2024-11-23 23:21:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:21:54,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825138033] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:54,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:54,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 28 [2024-11-23 23:21:54,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897932120] [2024-11-23 23:21:54,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:54,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-23 23:21:54,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:54,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-23 23:21:54,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2024-11-23 23:21:54,988 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) [2024-11-23 23:21:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:55,852 INFO L93 Difference]: Finished difference Result 492 states and 589 transitions. [2024-11-23 23:21:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-23 23:21:55,852 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 [2024-11-23 23:21:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:55,854 INFO L225 Difference]: With dead ends: 492 [2024-11-23 23:21:55,854 INFO L226 Difference]: Without dead ends: 480 [2024-11-23 23:21:55,854 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 [2024-11-23 23:21:55,855 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 98 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:21:55,855 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 655 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-23 23:21:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2024-11-23 23:21:55,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 396. [2024-11-23 23:21:55,865 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) [2024-11-23 23:21:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 483 transitions. [2024-11-23 23:21:55,867 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 483 transitions. Word has length 70 [2024-11-23 23:21:55,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:55,868 INFO L471 AbstractCegarLoop]: Abstraction has 396 states and 483 transitions. [2024-11-23 23:21:55,868 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) [2024-11-23 23:21:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 483 transitions. [2024-11-23 23:21:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-23 23:21:55,869 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:55,869 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] [2024-11-23 23:21:55,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-23 23:21:56,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:56,073 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)] === [2024-11-23 23:21:56,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:56,073 INFO L85 PathProgramCache]: Analyzing trace with hash 357521850, now seen corresponding path program 3 times [2024-11-23 23:21:56,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:56,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458886923] [2024-11-23 23:21:56,073 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:21:56,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:56,106 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-23 23:21:56,106 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-23 23:21:56,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:56,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458886923] [2024-11-23 23:21:56,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458886923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:56,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62284100] [2024-11-23 23:21:56,827 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:21:56,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:56,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:56,829 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:56,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-23 23:21:57,078 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-23 23:21:57,078 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:57,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-23 23:21:57,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:57,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-23 23:21:57,101 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 [2024-11-23 23:21:57,463 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 [2024-11-23 23:21:57,552 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 [2024-11-23 23:21:57,704 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 [2024-11-23 23:21:57,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-23 23:21:57,908 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 [2024-11-23 23:21:58,030 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 [2024-11-23 23:21:59,618 INFO L349 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2024-11-23 23:21:59,618 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 [2024-11-23 23:22:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 17 proven. 46 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 23:22:00,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:22:03,663 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 [2024-11-23 23:22:03,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:22:03,717 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 [2024-11-23 23:22:05,651 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 [2024-11-23 23:22:05,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 254 [2024-11-23 23:22:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 23:22:06,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62284100] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:22:06,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:22:06,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 33, 36] total 82 [2024-11-23 23:22:06,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998747737] [2024-11-23 23:22:06,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:22:06,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-23 23:22:06,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:22:06,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-23 23:22:06,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=6327, Unknown=0, NotChecked=0, Total=6806 [2024-11-23 23:22:06,864 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) [2024-11-23 23:22:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:22:15,307 INFO L93 Difference]: Finished difference Result 671 states and 813 transitions. [2024-11-23 23:22:15,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-23 23:22:15,307 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 [2024-11-23 23:22:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:22:15,309 INFO L225 Difference]: With dead ends: 671 [2024-11-23 23:22:15,309 INFO L226 Difference]: Without dead ends: 671 [2024-11-23 23:22:15,313 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4772 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1488, Invalid=16068, Unknown=0, NotChecked=0, Total=17556 [2024-11-23 23:22:15,313 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 1281 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 2669 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s 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, 2.9s IncrementalHoareTripleChecker+Time [2024-11-23 23:22:15,313 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 2054 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2669 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-23 23:22:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2024-11-23 23:22:15,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 588. [2024-11-23 23:22:15,324 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) [2024-11-23 23:22:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 732 transitions. [2024-11-23 23:22:15,326 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 732 transitions. Word has length 74 [2024-11-23 23:22:15,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:22:15,326 INFO L471 AbstractCegarLoop]: Abstraction has 588 states and 732 transitions. [2024-11-23 23:22:15,326 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) [2024-11-23 23:22:15,326 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 732 transitions. [2024-11-23 23:22:15,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-23 23:22:15,327 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:22:15,327 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] [2024-11-23 23:22:15,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-23 23:22:15,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:22:15,528 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)] === [2024-11-23 23:22:15,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:22:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1415717087, now seen corresponding path program 2 times [2024-11-23 23:22:15,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:22:15,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289785488] [2024-11-23 23:22:15,529 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:22:15,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:22:15,549 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:22:15,549 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:22:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-23 23:22:16,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:22:16,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289785488] [2024-11-23 23:22:16,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289785488] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:22:16,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348856579] [2024-11-23 23:22:16,318 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:22:16,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:22:16,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:22:16,320 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:22:16,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-23 23:22:16,506 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:22:16,506 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:22:16,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-23 23:22:16,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:22:16,844 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 [2024-11-23 23:22:16,877 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 [2024-11-23 23:22:17,297 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 [2024-11-23 23:22:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-23 23:22:17,379 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:22:17,842 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 [2024-11-23 23:22:17,882 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 [2024-11-23 23:22:17,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-23 23:22:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-23 23:22:18,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348856579] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:22:18,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:22:18,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 53 [2024-11-23 23:22:18,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306239025] [2024-11-23 23:22:18,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:22:18,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-23 23:22:18,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:22:18,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-23 23:22:18,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2558, Unknown=0, NotChecked=0, Total=2756 [2024-11-23 23:22:18,160 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) [2024-11-23 23:22:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:22:19,727 INFO L93 Difference]: Finished difference Result 638 states and 784 transitions. [2024-11-23 23:22:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-23 23:22:19,727 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 [2024-11-23 23:22:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:22:19,728 INFO L225 Difference]: With dead ends: 638 [2024-11-23 23:22:19,728 INFO L226 Difference]: Without dead ends: 596 [2024-11-23 23:22:19,729 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=402, Invalid=5298, Unknown=0, NotChecked=0, Total=5700 [2024-11-23 23:22:19,730 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 170 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:22:19,730 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1997 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-23 23:22:19,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2024-11-23 23:22:19,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 546. [2024-11-23 23:22:19,739 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) [2024-11-23 23:22:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 674 transitions. [2024-11-23 23:22:19,740 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 674 transitions. Word has length 74 [2024-11-23 23:22:19,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:22:19,740 INFO L471 AbstractCegarLoop]: Abstraction has 546 states and 674 transitions. [2024-11-23 23:22:19,741 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) [2024-11-23 23:22:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 674 transitions. [2024-11-23 23:22:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-23 23:22:19,742 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:22:19,742 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] [2024-11-23 23:22:19,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-23 23:22:19,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-23 23:22:19,943 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)] === [2024-11-23 23:22:19,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:22:19,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1217662155, now seen corresponding path program 1 times [2024-11-23 23:22:19,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:22:19,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526933283] [2024-11-23 23:22:19,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:22:19,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:22:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:22:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-23 23:22:20,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:22:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526933283] [2024-11-23 23:22:20,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526933283] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:22:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648177673] [2024-11-23 23:22:20,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:22:20,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:22:20,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:22:20,487 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:22:20,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-23 23:22:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:22:20,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-23 23:22:20,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:22:20,687 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 [2024-11-23 23:22:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-23 23:22:20,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:22:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-23 23:22:21,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648177673] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:22:21,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:22:21,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2024-11-23 23:22:21,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448662462] [2024-11-23 23:22:21,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:22:21,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-23 23:22:21,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:22:21,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-23 23:22:21,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2024-11-23 23:22:21,489 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) [2024-11-23 23:22:22,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:22:22,467 INFO L93 Difference]: Finished difference Result 836 states and 1003 transitions. [2024-11-23 23:22:22,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-23 23:22:22,468 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 [2024-11-23 23:22:22,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:22:22,470 INFO L225 Difference]: With dead ends: 836 [2024-11-23 23:22:22,470 INFO L226 Difference]: Without dead ends: 830 [2024-11-23 23:22:22,471 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 [2024-11-23 23:22:22,472 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 243 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2024-11-23 23:22:22,472 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] [2024-11-23 23:22:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2024-11-23 23:22:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 553. [2024-11-23 23:22:22,499 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) [2024-11-23 23:22:22,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 686 transitions. [2024-11-23 23:22:22,504 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 686 transitions. Word has length 75 [2024-11-23 23:22:22,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:22:22,504 INFO L471 AbstractCegarLoop]: Abstraction has 553 states and 686 transitions. [2024-11-23 23:22:22,504 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) [2024-11-23 23:22:22,504 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 686 transitions. [2024-11-23 23:22:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-23 23:22:22,505 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:22:22,506 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] [2024-11-23 23:22:22,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-23 23:22:22,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-23 23:22:22,707 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)] === [2024-11-23 23:22:22,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:22:22,707 INFO L85 PathProgramCache]: Analyzing trace with hash -897631730, now seen corresponding path program 3 times [2024-11-23 23:22:22,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:22:22,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105754868] [2024-11-23 23:22:22,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:22:22,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:22:22,756 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-23 23:22:22,756 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:22:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-23 23:22:22,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:22:22,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105754868] [2024-11-23 23:22:22,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105754868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:22:22,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518564425] [2024-11-23 23:22:22,953 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:22:22,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:22:22,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:22:22,956 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:22:22,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-23 23:22:23,210 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-23 23:22:23,210 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:22:23,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-23 23:22:23,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:22:23,565 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 [2024-11-23 23:22:23,615 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 [2024-11-23 23:22:25,010 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:22:25,010 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 [2024-11-23 23:22:25,451 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-23 23:22:25,451 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 [2024-11-23 23:22:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-23 23:22:25,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:22:27,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:22:27,553 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 [2024-11-23 23:22:27,651 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 [2024-11-23 23:22:27,658 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 [2024-11-23 23:22:28,207 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 [2024-11-23 23:22:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-23 23:22:28,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518564425] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:22:28,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:22:28,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 25, 26] total 58 [2024-11-23 23:22:28,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396071464] [2024-11-23 23:22:28,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:22:28,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-23 23:22:28,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:22:28,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-23 23:22:28,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=3088, Unknown=0, NotChecked=0, Total=3306 [2024-11-23 23:22:28,433 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) [2024-11-23 23:22:37,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:22:37,610 INFO L93 Difference]: Finished difference Result 854 states and 1019 transitions. [2024-11-23 23:22:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-23 23:22:37,610 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 [2024-11-23 23:22:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:22:37,617 INFO L225 Difference]: With dead ends: 854 [2024-11-23 23:22:37,617 INFO L226 Difference]: Without dead ends: 830 [2024-11-23 23:22:37,619 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3920 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1632, Invalid=15138, Unknown=0, NotChecked=0, Total=16770 [2024-11-23 23:22:37,621 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 888 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 2889 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:22:37,624 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1772 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2889 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-23 23:22:37,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2024-11-23 23:22:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 744. [2024-11-23 23:22:37,682 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) [2024-11-23 23:22:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 918 transitions. [2024-11-23 23:22:37,686 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 918 transitions. Word has length 76 [2024-11-23 23:22:37,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:22:37,686 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 918 transitions. [2024-11-23 23:22:37,686 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) [2024-11-23 23:22:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 918 transitions. [2024-11-23 23:22:37,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-23 23:22:37,694 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:22:37,694 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] [2024-11-23 23:22:37,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-23 23:22:37,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-23 23:22:37,895 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)] === [2024-11-23 23:22:37,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:22:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash 275699098, now seen corresponding path program 3 times [2024-11-23 23:22:37,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:22:37,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492686095] [2024-11-23 23:22:37,897 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:22:37,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:22:38,139 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:22:38,139 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:22:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-23 23:22:39,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:22:39,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492686095] [2024-11-23 23:22:39,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492686095] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:22:39,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865185651] [2024-11-23 23:22:39,777 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:22:39,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:22:39,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:22:39,779 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:22:39,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-23 23:22:40,000 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:22:40,000 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:22:40,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-23 23:22:40,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:22:40,321 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 [2024-11-23 23:22:40,405 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 [2024-11-23 23:22:42,979 INFO L349 Elim1Store]: treesize reduction 3, result has 88.0 percent of original size [2024-11-23 23:22:42,980 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 [2024-11-23 23:22:43,294 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-23 23:22:43,294 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 [2024-11-23 23:22:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-23 23:22:43,481 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:22:47,154 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 [2024-11-23 23:22:47,174 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:22:47,174 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 [2024-11-23 23:22:47,335 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 [2024-11-23 23:22:47,344 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 [2024-11-23 23:22:47,352 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 [2024-11-23 23:22:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-23 23:22:48,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865185651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:22:48,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:22:48,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 26, 26] total 62 [2024-11-23 23:22:48,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607132843] [2024-11-23 23:22:48,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:22:48,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-23 23:22:48,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:22:48,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-23 23:22:48,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=3564, Unknown=0, NotChecked=0, Total=3906 [2024-11-23 23:22:48,007 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) [2024-11-23 23:22:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:22:56,455 INFO L93 Difference]: Finished difference Result 796 states and 952 transitions. [2024-11-23 23:22:56,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-23 23:22:56,455 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 [2024-11-23 23:22:56,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:22:56,459 INFO L225 Difference]: With dead ends: 796 [2024-11-23 23:22:56,459 INFO L226 Difference]: Without dead ends: 796 [2024-11-23 23:22:56,460 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3218 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1614, Invalid=11726, Unknown=0, NotChecked=0, Total=13340 [2024-11-23 23:22:56,462 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 1435 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:22:56,465 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1435 Valid, 1318 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-23 23:22:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2024-11-23 23:22:56,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 744. [2024-11-23 23:22:56,481 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) [2024-11-23 23:22:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 912 transitions. [2024-11-23 23:22:56,483 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 912 transitions. Word has length 78 [2024-11-23 23:22:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:22:56,484 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 912 transitions. [2024-11-23 23:22:56,484 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) [2024-11-23 23:22:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 912 transitions. [2024-11-23 23:22:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-23 23:22:56,486 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:22:56,487 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] [2024-11-23 23:22:56,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-23 23:22:56,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-23 23:22:56,691 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)] === [2024-11-23 23:22:56,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:22:56,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1404893741, now seen corresponding path program 4 times [2024-11-23 23:22:56,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:22:56,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847955473] [2024-11-23 23:22:56,692 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:22:56,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:22:56,760 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:22:56,761 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:22:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-23 23:22:57,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:22:57,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847955473] [2024-11-23 23:22:57,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847955473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:22:57,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490547365] [2024-11-23 23:22:57,327 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:22:57,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:22:57,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:22:57,330 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:22:57,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-23 23:22:57,592 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:22:57,592 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:22:57,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-23 23:22:57,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:22:57,738 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 [2024-11-23 23:22:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 62 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-23 23:22:58,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:22:58,319 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 [2024-11-23 23:22:58,437 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 [2024-11-23 23:22:58,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-23 23:22:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-23 23:22:58,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490547365] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:22:58,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:22:58,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 19] total 31 [2024-11-23 23:22:58,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982419334] [2024-11-23 23:22:58,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:22:58,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-23 23:22:58,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:22:58,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-23 23:22:58,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2024-11-23 23:22:58,542 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) [2024-11-23 23:22:59,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:22:59,463 INFO L93 Difference]: Finished difference Result 1154 states and 1382 transitions. [2024-11-23 23:22:59,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-23 23:22:59,463 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 [2024-11-23 23:22:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:22:59,467 INFO L225 Difference]: With dead ends: 1154 [2024-11-23 23:22:59,468 INFO L226 Difference]: Without dead ends: 1139 [2024-11-23 23:22:59,468 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 [2024-11-23 23:22:59,469 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 [2024-11-23 23:22:59,469 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] [2024-11-23 23:22:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2024-11-23 23:22:59,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 767. [2024-11-23 23:22:59,489 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) [2024-11-23 23:22:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 937 transitions. [2024-11-23 23:22:59,491 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 937 transitions. Word has length 86 [2024-11-23 23:22:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:22:59,492 INFO L471 AbstractCegarLoop]: Abstraction has 767 states and 937 transitions. [2024-11-23 23:22:59,492 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) [2024-11-23 23:22:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 937 transitions. [2024-11-23 23:22:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-23 23:22:59,494 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:22:59,494 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] [2024-11-23 23:22:59,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-23 23:22:59,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-23 23:22:59,700 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)] === [2024-11-23 23:22:59,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:22:59,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1975351369, now seen corresponding path program 4 times [2024-11-23 23:22:59,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:22:59,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413476109] [2024-11-23 23:22:59,701 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:22:59,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:22:59,759 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:22:59,759 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:23:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-23 23:23:06,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:23:06,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413476109] [2024-11-23 23:23:06,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413476109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:23:06,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70777352] [2024-11-23 23:23:06,923 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:23:06,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:23:06,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:23:06,925 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:23:06,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-23 23:23:07,207 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:23:07,208 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:23:07,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-23 23:23:07,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:23:07,594 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 [2024-11-23 23:23:15,325 INFO L349 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2024-11-23 23:23:15,325 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 [2024-11-23 23:23:15,333 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:23:15,347 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-23 23:23:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 94 proven. 18 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-23 23:23:15,706 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:23:22,499 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 [2024-11-23 23:23:22,506 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 [2024-11-23 23:23:22,509 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-23 23:23:23,472 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 [2024-11-23 23:23:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-23 23:23:23,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70777352] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:23:23,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:23:23,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 38] total 107 [2024-11-23 23:23:23,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098619150] [2024-11-23 23:23:23,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:23:23,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-11-23 23:23:23,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:23:23,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-11-23 23:23:23,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=877, Invalid=10679, Unknown=0, NotChecked=0, Total=11556 [2024-11-23 23:23:23,713 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) [2024-11-23 23:23:32,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:23:32,648 INFO L93 Difference]: Finished difference Result 867 states and 1039 transitions. [2024-11-23 23:23:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-23 23:23:32,649 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 [2024-11-23 23:23:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:23:32,650 INFO L225 Difference]: With dead ends: 867 [2024-11-23 23:23:32,651 INFO L226 Difference]: Without dead ends: 697 [2024-11-23 23:23:32,652 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4399 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=1944, Invalid=14567, Unknown=1, NotChecked=0, Total=16512 [2024-11-23 23:23:32,654 INFO L435 NwaCegarLoop]: 124 mSDtfsCounter, 477 mSDsluCounter, 3999 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 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, 5.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:23:32,655 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 4123 Invalid, 4481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-23 23:23:32,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2024-11-23 23:23:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 482. [2024-11-23 23:23:32,665 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) [2024-11-23 23:23:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 587 transitions. [2024-11-23 23:23:32,666 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 587 transitions. Word has length 89 [2024-11-23 23:23:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:23:32,666 INFO L471 AbstractCegarLoop]: Abstraction has 482 states and 587 transitions. [2024-11-23 23:23:32,666 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) [2024-11-23 23:23:32,667 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 587 transitions. [2024-11-23 23:23:32,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-23 23:23:32,668 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:23:32,668 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] [2024-11-23 23:23:32,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-23 23:23:32,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:23:32,870 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)] === [2024-11-23 23:23:32,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:23:32,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1146777062, now seen corresponding path program 5 times [2024-11-23 23:23:32,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:23:32,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360045037] [2024-11-23 23:23:32,870 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:23:32,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:23:32,915 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-23 23:23:32,915 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:23:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-23 23:23:33,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:23:33,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360045037] [2024-11-23 23:23:33,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360045037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:23:33,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787221815] [2024-11-23 23:23:33,177 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:23:33,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:23:33,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:23:33,181 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:23:33,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-23 23:23:33,465 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-23 23:23:33,465 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:23:33,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-23 23:23:33,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:23:33,782 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 [2024-11-23 23:23:33,816 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 [2024-11-23 23:23:34,357 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 7 treesize of output 3 [2024-11-23 23:23:34,455 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 [2024-11-23 23:23:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-23 23:23:34,498 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:23:35,162 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 [2024-11-23 23:23:35,217 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 [2024-11-23 23:23:35,219 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 [2024-11-23 23:23:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-23 23:23:35,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787221815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:23:35,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:23:35,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 22] total 51 [2024-11-23 23:23:35,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551601269] [2024-11-23 23:23:35,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:23:35,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-23 23:23:35,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:23:35,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-23 23:23:35,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2406, Unknown=0, NotChecked=0, Total=2550 [2024-11-23 23:23:35,566 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) [2024-11-23 23:23:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:23:38,559 INFO L93 Difference]: Finished difference Result 717 states and 860 transitions. [2024-11-23 23:23:38,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-23 23:23:38,559 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 [2024-11-23 23:23:38,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:23:38,561 INFO L225 Difference]: With dead ends: 717 [2024-11-23 23:23:38,561 INFO L226 Difference]: Without dead ends: 631 [2024-11-23 23:23:38,561 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=371, Invalid=5791, Unknown=0, NotChecked=0, Total=6162 [2024-11-23 23:23:38,562 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 136 mSDsluCounter, 3135 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 3240 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:23:38,562 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 3240 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-23 23:23:38,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2024-11-23 23:23:38,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 569. [2024-11-23 23:23:38,570 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) [2024-11-23 23:23:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 712 transitions. [2024-11-23 23:23:38,571 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 712 transitions. Word has length 90 [2024-11-23 23:23:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:23:38,571 INFO L471 AbstractCegarLoop]: Abstraction has 569 states and 712 transitions. [2024-11-23 23:23:38,571 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) [2024-11-23 23:23:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 712 transitions. [2024-11-23 23:23:38,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-23 23:23:38,573 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:23:38,573 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] [2024-11-23 23:23:38,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-23 23:23:38,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:23:38,777 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)] === [2024-11-23 23:23:38,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:23:38,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1019743727, now seen corresponding path program 4 times [2024-11-23 23:23:38,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:23:38,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547605817] [2024-11-23 23:23:38,778 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:23:38,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:23:38,827 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:23:38,827 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:23:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-23 23:23:43,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:23:43,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547605817] [2024-11-23 23:23:43,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547605817] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:23:43,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069221948] [2024-11-23 23:23:43,523 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:23:43,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:23:43,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:23:43,526 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:23:43,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-23 23:23:43,766 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:23:43,767 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:23:43,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 156 conjuncts are in the unsatisfiable core [2024-11-23 23:23:43,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:23:44,184 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 [2024-11-23 23:23:44,285 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 [2024-11-23 23:23:44,471 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 [2024-11-23 23:23:44,568 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 [2024-11-23 23:23:44,668 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 [2024-11-23 23:23:51,256 INFO L349 Elim1Store]: treesize reduction 20, result has 70.1 percent of original size [2024-11-23 23:23:51,256 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 [2024-11-23 23:23:51,265 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:23:51,689 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 [2024-11-23 23:23:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-23 23:23:51,870 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:23:58,778 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 [2024-11-23 23:23:58,788 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 [2024-11-23 23:23:58,792 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:24:28,274 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 [2024-11-23 23:24:28,281 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 [2024-11-23 23:24:29,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-23 23:24:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 5 proven. 81 refuted. 1 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-23 23:24:29,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069221948] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:24:29,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:24:29,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 42, 42] total 112 [2024-11-23 23:24:29,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821673214] [2024-11-23 23:24:29,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:24:29,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-11-23 23:24:29,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:24:29,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-11-23 23:24:29,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=11864, Unknown=7, NotChecked=0, Total=12656 [2024-11-23 23:24:29,204 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) [2024-11-23 23:24:41,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:24:41,439 INFO L93 Difference]: Finished difference Result 687 states and 834 transitions. [2024-11-23 23:24:41,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-23 23:24:41,440 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 [2024-11-23 23:24:41,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:24:41,442 INFO L225 Difference]: With dead ends: 687 [2024-11-23 23:24:41,442 INFO L226 Difference]: Without dead ends: 512 [2024-11-23 23:24:41,443 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6329 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=2481, Invalid=20162, Unknown=7, NotChecked=0, Total=22650 [2024-11-23 23:24:41,444 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 973 mSDsluCounter, 3150 mSDsCounter, 0 mSdLazyCounter, 5368 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 3235 SdHoareTripleChecker+Invalid, 5376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:24:41,444 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 3235 Invalid, 5376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5368 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2024-11-23 23:24:41,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2024-11-23 23:24:41,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 276. [2024-11-23 23:24:41,451 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) [2024-11-23 23:24:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 342 transitions. [2024-11-23 23:24:41,452 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 342 transitions. Word has length 93 [2024-11-23 23:24:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:24:41,452 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 342 transitions. [2024-11-23 23:24:41,453 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) [2024-11-23 23:24:41,453 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 342 transitions. [2024-11-23 23:24:41,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-23 23:24:41,459 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:24:41,459 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] [2024-11-23 23:24:41,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-23 23:24:41,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:24:41,660 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)] === [2024-11-23 23:24:41,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:24:41,661 INFO L85 PathProgramCache]: Analyzing trace with hash -822433802, now seen corresponding path program 6 times [2024-11-23 23:24:41,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:24:41,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416461821] [2024-11-23 23:24:41,661 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:24:41,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:24:41,777 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-23 23:24:41,777 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:24:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-23 23:24:42,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:24:42,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416461821] [2024-11-23 23:24:42,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416461821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:24:42,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724744090] [2024-11-23 23:24:42,765 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:24:42,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:24:42,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:24:42,767 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:24:42,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-23 23:24:43,074 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-23 23:24:43,075 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:24:43,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-23 23:24:43,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:24:43,316 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 [2024-11-23 23:24:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 11 proven. 60 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-23 23:24:43,575 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:24:43,609 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 [2024-11-23 23:24:43,611 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 [2024-11-23 23:24:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 11 proven. 60 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-23 23:24:43,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724744090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:24:43,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:24:43,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 36 [2024-11-23 23:24:43,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141673580] [2024-11-23 23:24:43,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:24:43,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-23 23:24:43,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:24:43,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-23 23:24:43,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1162, Unknown=0, NotChecked=0, Total=1260 [2024-11-23 23:24:43,742 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) [2024-11-23 23:24:45,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:24:45,185 INFO L93 Difference]: Finished difference Result 399 states and 491 transitions. [2024-11-23 23:24:45,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-23 23:24:45,185 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 [2024-11-23 23:24:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:24:45,187 INFO L225 Difference]: With dead ends: 399 [2024-11-23 23:24:45,187 INFO L226 Difference]: Without dead ends: 399 [2024-11-23 23:24:45,187 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=271, Invalid=2809, Unknown=0, NotChecked=0, Total=3080 [2024-11-23 23:24:45,188 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 135 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:24:45,188 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1114 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:24:45,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-11-23 23:24:45,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 298. [2024-11-23 23:24:45,192 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) [2024-11-23 23:24:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 365 transitions. [2024-11-23 23:24:45,193 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 365 transitions. Word has length 97 [2024-11-23 23:24:45,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:24:45,193 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 365 transitions. [2024-11-23 23:24:45,193 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) [2024-11-23 23:24:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 365 transitions. [2024-11-23 23:24:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-23 23:24:45,194 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:24:45,195 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] [2024-11-23 23:24:45,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-23 23:24:45,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-23 23:24:45,395 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)] === [2024-11-23 23:24:45,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:24:45,395 INFO L85 PathProgramCache]: Analyzing trace with hash 701396023, now seen corresponding path program 5 times [2024-11-23 23:24:45,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:24:45,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977889934] [2024-11-23 23:24:45,396 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:24:45,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:24:45,446 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-23 23:24:45,446 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:24:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-23 23:24:46,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:24:46,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977889934] [2024-11-23 23:24:46,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977889934] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:24:46,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747969188] [2024-11-23 23:24:46,814 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:24:46,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:24:46,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:24:46,816 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:24:46,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-23 23:24:47,108 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-23 23:24:47,108 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:24:47,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-23 23:24:47,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:24:47,635 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 [2024-11-23 23:24:47,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-23 23:24:48,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-23 23:24:48,587 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 [2024-11-23 23:24:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-23 23:24:48,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:24:49,448 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 [2024-11-23 23:24:49,525 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 [2024-11-23 23:24:49,528 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 [2024-11-23 23:24:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-23 23:24:49,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747969188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:24:49,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:24:49,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 22] total 59 [2024-11-23 23:24:49,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122085917] [2024-11-23 23:24:49,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:24:49,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-23 23:24:49,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:24:49,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-23 23:24:49,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3262, Unknown=0, NotChecked=0, Total=3422 [2024-11-23 23:24:49,995 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) [2024-11-23 23:24:53,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:24:53,453 INFO L93 Difference]: Finished difference Result 579 states and 696 transitions. [2024-11-23 23:24:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-23 23:24:53,454 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 [2024-11-23 23:24:53,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:24:53,455 INFO L225 Difference]: With dead ends: 579 [2024-11-23 23:24:53,455 INFO L226 Difference]: Without dead ends: 579 [2024-11-23 23:24:53,456 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=373, Invalid=6599, Unknown=0, NotChecked=0, Total=6972 [2024-11-23 23:24:53,456 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 183 mSDsluCounter, 2730 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 2801 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:24:53,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 2801 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-23 23:24:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2024-11-23 23:24:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 553. [2024-11-23 23:24:53,462 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) [2024-11-23 23:24:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 676 transitions. [2024-11-23 23:24:53,463 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 676 transitions. Word has length 97 [2024-11-23 23:24:53,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:24:53,463 INFO L471 AbstractCegarLoop]: Abstraction has 553 states and 676 transitions. [2024-11-23 23:24:53,464 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) [2024-11-23 23:24:53,464 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 676 transitions. [2024-11-23 23:24:53,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-23 23:24:53,465 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:24:53,465 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] [2024-11-23 23:24:53,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-23 23:24:53,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-23 23:24:53,666 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)] === [2024-11-23 23:24:53,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:24:53,666 INFO L85 PathProgramCache]: Analyzing trace with hash -150649442, now seen corresponding path program 6 times [2024-11-23 23:24:53,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:24:53,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129905861] [2024-11-23 23:24:53,667 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:24:53,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:24:53,713 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-23 23:24:53,713 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:24:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-23 23:24:54,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:24:54,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129905861] [2024-11-23 23:24:54,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129905861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:24:54,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397501055] [2024-11-23 23:24:54,641 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:24:54,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:24:54,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:24:54,644 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:24:54,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-23 23:24:54,936 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-23 23:24:54,936 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:24:54,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-23 23:24:54,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:24:55,356 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 [2024-11-23 23:24:55,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-23 23:24:56,941 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 [2024-11-23 23:24:57,335 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-23 23:24:57,335 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 [2024-11-23 23:24:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-23 23:24:57,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:24:59,508 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 [2024-11-23 23:24:59,613 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 [2024-11-23 23:24:59,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2024-11-23 23:24:59,625 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 [2024-11-23 23:25:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-23 23:25:00,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397501055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:25:00,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:25:00,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 27, 25] total 64 [2024-11-23 23:25:00,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451339994] [2024-11-23 23:25:00,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:25:00,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-23 23:25:00,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:25:00,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-23 23:25:00,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3878, Unknown=0, NotChecked=0, Total=4160 [2024-11-23 23:25:00,286 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) [2024-11-23 23:25:10,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:25:10,861 INFO L93 Difference]: Finished difference Result 839 states and 1003 transitions. [2024-11-23 23:25:10,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-23 23:25:10,862 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 [2024-11-23 23:25:10,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:25:10,863 INFO L225 Difference]: With dead ends: 839 [2024-11-23 23:25:10,863 INFO L226 Difference]: Without dead ends: 494 [2024-11-23 23:25:10,864 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 [2024-11-23 23:25:10,864 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 802 mSDsluCounter, 2473 mSDsCounter, 0 mSdLazyCounter, 3435 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 3450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:25:10,864 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 2543 Invalid, 3450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3435 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-23 23:25:10,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2024-11-23 23:25:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 267. [2024-11-23 23:25:10,868 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) [2024-11-23 23:25:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 315 transitions. [2024-11-23 23:25:10,869 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 315 transitions. Word has length 101 [2024-11-23 23:25:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:25:10,869 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 315 transitions. [2024-11-23 23:25:10,869 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) [2024-11-23 23:25:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 315 transitions. [2024-11-23 23:25:10,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-23 23:25:10,870 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:25:10,870 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] [2024-11-23 23:25:10,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-23 23:25:11,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-23 23:25:11,071 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)] === [2024-11-23 23:25:11,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:25:11,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2028292894, now seen corresponding path program 2 times [2024-11-23 23:25:11,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:25:11,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106860558] [2024-11-23 23:25:11,071 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:25:11,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:25:11,102 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:25:11,103 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-23 23:25:11,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:25:11,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106860558] [2024-11-23 23:25:11,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106860558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:25:11,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312780800] [2024-11-23 23:25:11,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:25:11,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:25:11,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:25:11,893 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:25:11,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-23 23:25:12,173 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:25:12,173 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:12,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-23 23:25:12,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:25:12,197 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 [2024-11-23 23:25:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-23 23:25:12,993 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:25:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-23 23:25:14,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312780800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:25:14,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:25:14,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 45 [2024-11-23 23:25:14,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923435611] [2024-11-23 23:25:14,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:25:14,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-23 23:25:14,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:25:14,027 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-23 23:25:14,027 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2024-11-23 23:25:14,028 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) [2024-11-23 23:25:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:25:15,211 INFO L93 Difference]: Finished difference Result 355 states and 418 transitions. [2024-11-23 23:25:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-23 23:25:15,211 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 [2024-11-23 23:25:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:25:15,213 INFO L225 Difference]: With dead ends: 355 [2024-11-23 23:25:15,213 INFO L226 Difference]: Without dead ends: 355 [2024-11-23 23:25:15,214 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=495, Invalid=3665, Unknown=0, NotChecked=0, Total=4160 [2024-11-23 23:25:15,214 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 241 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:25:15,214 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 1041 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-23 23:25:15,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2024-11-23 23:25:15,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 306. [2024-11-23 23:25:15,219 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) [2024-11-23 23:25:15,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 369 transitions. [2024-11-23 23:25:15,219 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 369 transitions. Word has length 103 [2024-11-23 23:25:15,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:25:15,219 INFO L471 AbstractCegarLoop]: Abstraction has 306 states and 369 transitions. [2024-11-23 23:25:15,220 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) [2024-11-23 23:25:15,220 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 369 transitions. [2024-11-23 23:25:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-23 23:25:15,221 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:25:15,221 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] [2024-11-23 23:25:15,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-23 23:25:15,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:25:15,421 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)] === [2024-11-23 23:25:15,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:25:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1592884896, now seen corresponding path program 2 times [2024-11-23 23:25:15,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:25:15,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545269660] [2024-11-23 23:25:15,422 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:25:15,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:25:15,436 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 23:25:15,436 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-23 23:25:15,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:25:15,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545269660] [2024-11-23 23:25:15,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545269660] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:25:15,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:25:15,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:25:15,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302191521] [2024-11-23 23:25:15,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:25:15,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:25:15,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:25:15,510 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:25:15,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:25:15,511 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) [2024-11-23 23:25:15,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:25:15,580 INFO L93 Difference]: Finished difference Result 308 states and 369 transitions. [2024-11-23 23:25:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:25:15,581 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 [2024-11-23 23:25:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:25:15,582 INFO L225 Difference]: With dead ends: 308 [2024-11-23 23:25:15,582 INFO L226 Difference]: Without dead ends: 308 [2024-11-23 23:25:15,582 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 [2024-11-23 23:25:15,583 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 8 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:25:15,583 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 169 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:25:15,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-23 23:25:15,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 296. [2024-11-23 23:25:15,587 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) [2024-11-23 23:25:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 357 transitions. [2024-11-23 23:25:15,587 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 357 transitions. Word has length 107 [2024-11-23 23:25:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:25:15,588 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 357 transitions. [2024-11-23 23:25:15,588 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) [2024-11-23 23:25:15,588 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 357 transitions. [2024-11-23 23:25:15,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-23 23:25:15,589 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:25:15,589 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] [2024-11-23 23:25:15,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-11-23 23:25:15,589 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)] === [2024-11-23 23:25:15,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:25:15,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1997355106, now seen corresponding path program 3 times [2024-11-23 23:25:15,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:25:15,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218263688] [2024-11-23 23:25:15,590 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:25:15,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:25:15,646 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-23 23:25:15,646 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 40 proven. 68 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-11-23 23:25:16,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:25:16,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218263688] [2024-11-23 23:25:16,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218263688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:25:16,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215464002] [2024-11-23 23:25:16,041 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:25:16,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:25:16,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:25:16,043 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:25:16,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-23 23:25:16,396 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-23 23:25:16,396 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:16,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-23 23:25:16,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:25:16,800 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 [2024-11-23 23:25:16,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-23 23:25:17,704 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 [2024-11-23 23:25:17,802 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 16 treesize of output 8 [2024-11-23 23:25:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 51 proven. 66 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-23 23:25:17,846 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:25:18,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2024-11-23 23:25:18,856 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 [2024-11-23 23:25:18,862 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 [2024-11-23 23:25:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 67 proven. 50 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-23 23:25:19,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215464002] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:25:19,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:25:19,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25, 26] total 62 [2024-11-23 23:25:19,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740572245] [2024-11-23 23:25:19,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:25:19,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-23 23:25:19,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:25:19,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-23 23:25:19,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3608, Unknown=0, NotChecked=0, Total=3782 [2024-11-23 23:25:19,292 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) [2024-11-23 23:25:23,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:25:23,200 INFO L93 Difference]: Finished difference Result 485 states and 570 transitions. [2024-11-23 23:25:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-23 23:25:23,201 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 [2024-11-23 23:25:23,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:25:23,202 INFO L225 Difference]: With dead ends: 485 [2024-11-23 23:25:23,202 INFO L226 Difference]: Without dead ends: 293 [2024-11-23 23:25:23,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=506, Invalid=9796, Unknown=0, NotChecked=0, Total=10302 [2024-11-23 23:25:23,203 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 298 mSDsluCounter, 2573 mSDsCounter, 0 mSdLazyCounter, 2913 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:25:23,203 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 2646 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2913 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-23 23:25:23,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-11-23 23:25:23,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 282. [2024-11-23 23:25:23,208 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) [2024-11-23 23:25:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 333 transitions. [2024-11-23 23:25:23,208 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 333 transitions. Word has length 117 [2024-11-23 23:25:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:25:23,210 INFO L471 AbstractCegarLoop]: Abstraction has 282 states and 333 transitions. [2024-11-23 23:25:23,210 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) [2024-11-23 23:25:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 333 transitions. [2024-11-23 23:25:23,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-23 23:25:23,211 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:25:23,211 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] [2024-11-23 23:25:23,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-23 23:25:23,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:25:23,411 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)] === [2024-11-23 23:25:23,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:25:23,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1849161906, now seen corresponding path program 4 times [2024-11-23 23:25:23,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:25:23,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598270115] [2024-11-23 23:25:23,412 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:25:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:25:23,444 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:25:23,445 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 22 proven. 103 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-11-23 23:25:24,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:25:24,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598270115] [2024-11-23 23:25:24,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598270115] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:25:24,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905416333] [2024-11-23 23:25:24,159 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:25:24,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:25:24,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:25:24,162 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:25:24,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-23 23:25:24,459 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:25:24,459 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:24,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-23 23:25:24,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:25:24,711 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 13 treesize of output 9 [2024-11-23 23:25:24,993 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 [2024-11-23 23:25:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 14 proven. 92 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-23 23:25:25,026 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:25:25,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-23 23:25:25,250 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 [2024-11-23 23:25:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 14 proven. 92 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-23 23:25:25,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905416333] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:25:25,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:25:25,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 43 [2024-11-23 23:25:25,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588566392] [2024-11-23 23:25:25,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:25:25,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-23 23:25:25,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:25:25,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-23 23:25:25,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2024-11-23 23:25:25,380 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) [2024-11-23 23:25:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:25:27,453 INFO L93 Difference]: Finished difference Result 406 states and 463 transitions. [2024-11-23 23:25:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-23 23:25:27,454 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 [2024-11-23 23:25:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:25:27,456 INFO L225 Difference]: With dead ends: 406 [2024-11-23 23:25:27,456 INFO L226 Difference]: Without dead ends: 364 [2024-11-23 23:25:27,456 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=247, Invalid=3785, Unknown=0, NotChecked=0, Total=4032 [2024-11-23 23:25:27,456 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 158 mSDsluCounter, 2343 mSDsCounter, 0 mSdLazyCounter, 2551 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 2422 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:25:27,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 2422 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2551 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-23 23:25:27,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-23 23:25:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 304. [2024-11-23 23:25:27,459 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) [2024-11-23 23:25:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 361 transitions. [2024-11-23 23:25:27,459 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 361 transitions. Word has length 124 [2024-11-23 23:25:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:25:27,460 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 361 transitions. [2024-11-23 23:25:27,460 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) [2024-11-23 23:25:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 361 transitions. [2024-11-23 23:25:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-23 23:25:27,460 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:25:27,460 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] [2024-11-23 23:25:27,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-23 23:25:27,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-23 23:25:27,661 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)] === [2024-11-23 23:25:27,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:25:27,661 INFO L85 PathProgramCache]: Analyzing trace with hash 232023661, now seen corresponding path program 5 times [2024-11-23 23:25:27,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:25:27,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112238248] [2024-11-23 23:25:27,662 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:25:27,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:25:27,739 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-23 23:25:27,740 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 92 proven. 68 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-11-23 23:25:28,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:25:28,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112238248] [2024-11-23 23:25:28,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112238248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:25:28,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253198900] [2024-11-23 23:25:28,748 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:25:28,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:25:28,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:25:28,750 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:25:28,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-23 23:25:29,350 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-23 23:25:29,350 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:29,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 202 conjuncts are in the unsatisfiable core [2024-11-23 23:25:29,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:25:29,770 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 [2024-11-23 23:25:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 23 proven. 230 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-23 23:25:31,349 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:25:31,586 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 [2024-11-23 23:25:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 23 proven. 140 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-23 23:25:32,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253198900] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:25:32,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:25:32,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35, 21] total 71 [2024-11-23 23:25:32,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339193051] [2024-11-23 23:25:32,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:25:32,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-23 23:25:32,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:25:32,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-23 23:25:32,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4758, Unknown=0, NotChecked=0, Total=4970 [2024-11-23 23:25:32,645 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) [2024-11-23 23:25:38,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:25:38,397 INFO L93 Difference]: Finished difference Result 649 states and 761 transitions. [2024-11-23 23:25:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-11-23 23:25:38,397 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 [2024-11-23 23:25:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:25:38,398 INFO L225 Difference]: With dead ends: 649 [2024-11-23 23:25:38,398 INFO L226 Difference]: Without dead ends: 314 [2024-11-23 23:25:38,399 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4645 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1502, Invalid=18238, Unknown=0, NotChecked=0, Total=19740 [2024-11-23 23:25:38,399 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 1031 mSDsluCounter, 2636 mSDsCounter, 0 mSdLazyCounter, 3989 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 2706 SdHoareTripleChecker+Invalid, 3993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 3989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:25:38,399 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 2706 Invalid, 3993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 3989 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-23 23:25:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2024-11-23 23:25:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 310. [2024-11-23 23:25:38,402 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) [2024-11-23 23:25:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 367 transitions. [2024-11-23 23:25:38,403 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 367 transitions. Word has length 135 [2024-11-23 23:25:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:25:38,403 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 367 transitions. [2024-11-23 23:25:38,403 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) [2024-11-23 23:25:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 367 transitions. [2024-11-23 23:25:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-23 23:25:38,404 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:25:38,404 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] [2024-11-23 23:25:38,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-23 23:25:38,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:25:38,604 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)] === [2024-11-23 23:25:38,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:25:38,605 INFO L85 PathProgramCache]: Analyzing trace with hash 238887980, now seen corresponding path program 6 times [2024-11-23 23:25:38,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:25:38,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479195347] [2024-11-23 23:25:38,605 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:25:38,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:25:38,682 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-23 23:25:38,682 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 57 proven. 91 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-23 23:25:39,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:25:39,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479195347] [2024-11-23 23:25:39,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479195347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:25:39,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314700026] [2024-11-23 23:25:39,819 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:25:39,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:25:39,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:25:39,821 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:25:39,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-23 23:25:40,397 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-23 23:25:40,397 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:40,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-23 23:25:40,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:25:40,409 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 [2024-11-23 23:25:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 51 proven. 129 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-23 23:25:41,026 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:25:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 57 proven. 123 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-23 23:25:42,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314700026] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:25:42,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:25:42,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 18] total 58 [2024-11-23 23:25:42,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725490347] [2024-11-23 23:25:42,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:25:42,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-23 23:25:42,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:25:42,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-23 23:25:42,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=2978, Unknown=0, NotChecked=0, Total=3306 [2024-11-23 23:25:42,138 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) [2024-11-23 23:25:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:25:43,637 INFO L93 Difference]: Finished difference Result 452 states and 515 transitions. [2024-11-23 23:25:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-23 23:25:43,637 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 [2024-11-23 23:25:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:25:43,638 INFO L225 Difference]: With dead ends: 452 [2024-11-23 23:25:43,638 INFO L226 Difference]: Without dead ends: 400 [2024-11-23 23:25:43,639 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2302 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=840, Invalid=6132, Unknown=0, NotChecked=0, Total=6972 [2024-11-23 23:25:43,639 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 296 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:25:43,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 998 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:25:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2024-11-23 23:25:43,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 332. [2024-11-23 23:25:43,643 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) [2024-11-23 23:25:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 395 transitions. [2024-11-23 23:25:43,644 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 395 transitions. Word has length 138 [2024-11-23 23:25:43,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:25:43,644 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 395 transitions. [2024-11-23 23:25:43,645 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) [2024-11-23 23:25:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 395 transitions. [2024-11-23 23:25:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-23 23:25:43,645 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:25:43,646 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] [2024-11-23 23:25:43,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-23 23:25:43,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:25:43,846 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)] === [2024-11-23 23:25:43,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:25:43,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1991122291, now seen corresponding path program 7 times [2024-11-23 23:25:43,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:25:43,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401992996] [2024-11-23 23:25:43,847 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:25:43,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:25:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:25:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 168 proven. 45 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2024-11-23 23:25:45,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:25:45,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401992996] [2024-11-23 23:25:45,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401992996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:25:45,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249912338] [2024-11-23 23:25:45,087 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:25:45,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:25:45,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:25:45,089 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:25:45,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-23 23:25:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:25:45,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 190 conjuncts are in the unsatisfiable core [2024-11-23 23:25:45,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:25:45,413 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 [2024-11-23 23:25:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 27 proven. 198 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-11-23 23:25:46,341 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:25:46,515 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 [2024-11-23 23:25:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 27 proven. 198 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-11-23 23:25:47,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249912338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:25:47,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:25:47,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 54 [2024-11-23 23:25:47,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842410035] [2024-11-23 23:25:47,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:25:47,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-23 23:25:47,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:25:47,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-23 23:25:47,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2024-11-23 23:25:47,152 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) [2024-11-23 23:25:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:25:51,046 INFO L93 Difference]: Finished difference Result 732 states and 860 transitions. [2024-11-23 23:25:51,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-23 23:25:51,046 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 [2024-11-23 23:25:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:25:51,047 INFO L225 Difference]: With dead ends: 732 [2024-11-23 23:25:51,047 INFO L226 Difference]: Without dead ends: 168 [2024-11-23 23:25:51,048 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=755, Invalid=9547, Unknown=0, NotChecked=0, Total=10302 [2024-11-23 23:25:51,048 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 1273 mSDsluCounter, 3016 mSDsCounter, 0 mSdLazyCounter, 3294 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 3100 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:25:51,048 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1273 Valid, 3100 Invalid, 3306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3294 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-23 23:25:51,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-23 23:25:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2024-11-23 23:25:51,050 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) [2024-11-23 23:25:51,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2024-11-23 23:25:51,051 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 149 [2024-11-23 23:25:51,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:25:51,051 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2024-11-23 23:25:51,051 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) [2024-11-23 23:25:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2024-11-23 23:25:51,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-23 23:25:51,052 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:25:51,052 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] [2024-11-23 23:25:51,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-23 23:25:51,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-11-23 23:25:51,253 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)] === [2024-11-23 23:25:51,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:25:51,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1414332291, now seen corresponding path program 8 times [2024-11-23 23:25:51,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:25:51,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205673013] [2024-11-23 23:25:51,253 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:25:51,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:25:51,328 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:25:51,328 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 51 proven. 194 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-11-23 23:25:52,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:25:52,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205673013] [2024-11-23 23:25:52,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205673013] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:25:52,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794453556] [2024-11-23 23:25:52,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:25:52,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:25:52,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:25:52,712 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:25:52,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-23 23:25:53,043 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:25:53,043 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:53,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-23 23:25:53,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:25:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 70 proven. 175 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-11-23 23:25:53,833 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:25:54,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:25:54,427 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 [2024-11-23 23:25:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 70 proven. 175 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-11-23 23:25:55,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794453556] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:25:55,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:25:55,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 52 [2024-11-23 23:25:55,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994076430] [2024-11-23 23:25:55,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:25:55,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-23 23:25:55,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:25:55,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-23 23:25:55,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2427, Unknown=0, NotChecked=0, Total=2756 [2024-11-23 23:25:55,079 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) [2024-11-23 23:25:56,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:25:56,963 INFO L93 Difference]: Finished difference Result 202 states and 231 transitions. [2024-11-23 23:25:56,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-23 23:25:56,963 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 [2024-11-23 23:25:56,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:25:56,964 INFO L225 Difference]: With dead ends: 202 [2024-11-23 23:25:56,964 INFO L226 Difference]: Without dead ends: 202 [2024-11-23 23:25:56,965 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=567, Invalid=4689, Unknown=0, NotChecked=0, Total=5256 [2024-11-23 23:25:56,965 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 364 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 2020 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:25:56,966 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 2020 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1959 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-23 23:25:56,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-23 23:25:56,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 171. [2024-11-23 23:25:56,969 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) [2024-11-23 23:25:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2024-11-23 23:25:56,969 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 156 [2024-11-23 23:25:56,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:25:56,970 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2024-11-23 23:25:56,970 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) [2024-11-23 23:25:56,970 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2024-11-23 23:25:56,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-11-23 23:25:56,971 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:25:56,971 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] [2024-11-23 23:25:56,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-23 23:25:57,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-11-23 23:25:57,171 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)] === [2024-11-23 23:25:57,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:25:57,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1212543141, now seen corresponding path program 9 times [2024-11-23 23:25:57,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:25:57,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792431022] [2024-11-23 23:25:57,172 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:25:57,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:25:57,282 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-23 23:25:57,282 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 70 proven. 224 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-11-23 23:25:58,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:25:58,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792431022] [2024-11-23 23:25:58,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792431022] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:25:58,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849578674] [2024-11-23 23:25:58,045 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:25:58,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:25:58,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:25:58,047 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:25:58,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-23 23:25:58,701 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-23 23:25:58,701 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:25:58,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-11-23 23:25:58,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:25:59,314 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 [2024-11-23 23:25:59,358 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 [2024-11-23 23:26:01,016 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 [2024-11-23 23:26:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 123 proven. 192 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-23 23:26:01,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:26:02,960 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 [2024-11-23 23:26:03,046 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 [2024-11-23 23:26:03,049 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 [2024-11-23 23:26:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 165 proven. 150 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-23 23:26:03,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849578674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:26:03,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:26:03,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 33, 34] total 83 [2024-11-23 23:26:03,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155270558] [2024-11-23 23:26:03,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:26:03,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-23 23:26:03,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:03,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-23 23:26:03,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=6574, Unknown=0, NotChecked=0, Total=6806 [2024-11-23 23:26:03,734 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) [2024-11-23 23:26:11,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:26:11,618 INFO L93 Difference]: Finished difference Result 503 states and 585 transitions. [2024-11-23 23:26:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-23 23:26:11,619 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 [2024-11-23 23:26:11,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:26:11,620 INFO L225 Difference]: With dead ends: 503 [2024-11-23 23:26:11,620 INFO L226 Difference]: Without dead ends: 313 [2024-11-23 23:26:11,621 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3105 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=730, Invalid=19292, Unknown=0, NotChecked=0, Total=20022 [2024-11-23 23:26:11,621 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 503 mSDsluCounter, 5690 mSDsCounter, 0 mSdLazyCounter, 6294 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 5804 SdHoareTripleChecker+Invalid, 6302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 6294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:26:11,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 5804 Invalid, 6302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 6294 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-23 23:26:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-11-23 23:26:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 287. [2024-11-23 23:26:11,623 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) [2024-11-23 23:26:11,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 333 transitions. [2024-11-23 23:26:11,624 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 333 transitions. Word has length 163 [2024-11-23 23:26:11,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:26:11,624 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 333 transitions. [2024-11-23 23:26:11,624 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) [2024-11-23 23:26:11,624 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 333 transitions. [2024-11-23 23:26:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-23 23:26:11,625 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:26:11,625 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] [2024-11-23 23:26:11,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-23 23:26:11,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-11-23 23:26:11,825 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)] === [2024-11-23 23:26:11,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:11,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1133275721, now seen corresponding path program 10 times [2024-11-23 23:26:11,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:11,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035769728] [2024-11-23 23:26:11,826 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:26:11,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:11,878 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:26:11,878 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:26:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 92 proven. 228 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-11-23 23:26:13,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:13,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035769728] [2024-11-23 23:26:13,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035769728] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:26:13,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141418812] [2024-11-23 23:26:13,193 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:26:13,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:26:13,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:26:13,196 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:26:13,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-23 23:26:13,677 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:26:13,677 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:26:13,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 186 conjuncts are in the unsatisfiable core [2024-11-23 23:26:13,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:26:14,057 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 [2024-11-23 23:26:14,816 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 [2024-11-23 23:26:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 75 proven. 261 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-11-23 23:26:14,862 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:26:15,105 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 [2024-11-23 23:26:15,257 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 [2024-11-23 23:26:15,259 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 [2024-11-23 23:26:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 75 proven. 261 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-11-23 23:26:15,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141418812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:26:15,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:26:15,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 27] total 55 [2024-11-23 23:26:15,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127563447] [2024-11-23 23:26:15,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:26:15,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-23 23:26:15,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:15,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-23 23:26:15,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2804, Unknown=0, NotChecked=0, Total=2970 [2024-11-23 23:26:15,464 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) [2024-11-23 23:26:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:26:20,037 INFO L93 Difference]: Finished difference Result 548 states and 636 transitions. [2024-11-23 23:26:20,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-23 23:26:20,038 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 [2024-11-23 23:26:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:26:20,039 INFO L225 Difference]: With dead ends: 548 [2024-11-23 23:26:20,039 INFO L226 Difference]: Without dead ends: 345 [2024-11-23 23:26:20,039 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 [2024-11-23 23:26:20,039 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 468 mSDsluCounter, 3824 mSDsCounter, 0 mSdLazyCounter, 4978 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 3929 SdHoareTripleChecker+Invalid, 4986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 4978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:26:20,039 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 3929 Invalid, 4986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 4978 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-23 23:26:20,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2024-11-23 23:26:20,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 302. [2024-11-23 23:26:20,042 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) [2024-11-23 23:26:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 351 transitions. [2024-11-23 23:26:20,043 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 351 transitions. Word has length 170 [2024-11-23 23:26:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:26:20,043 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 351 transitions. [2024-11-23 23:26:20,043 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) [2024-11-23 23:26:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 351 transitions. [2024-11-23 23:26:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-11-23 23:26:20,044 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:26:20,044 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] [2024-11-23 23:26:20,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-23 23:26:20,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:26:20,244 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)] === [2024-11-23 23:26:20,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:20,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1853436536, now seen corresponding path program 11 times [2024-11-23 23:26:20,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:20,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792638935] [2024-11-23 23:26:20,245 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:26:20,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:20,331 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-23 23:26:20,331 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:26:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 154 proven. 222 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-23 23:26:21,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:21,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792638935] [2024-11-23 23:26:21,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792638935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:26:21,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073201205] [2024-11-23 23:26:21,851 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:26:21,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:26:21,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:26:21,853 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:26:21,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-23 23:26:22,538 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-23 23:26:22,538 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:26:22,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 269 conjuncts are in the unsatisfiable core [2024-11-23 23:26:22,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:26:23,267 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 [2024-11-23 23:26:23,270 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 [2024-11-23 23:26:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 35 proven. 497 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-23 23:26:26,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:26:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 35 proven. 344 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-23 23:26:30,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073201205] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:26:30,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:26:30,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 47, 36] total 107 [2024-11-23 23:26:30,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16342770] [2024-11-23 23:26:30,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:26:30,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2024-11-23 23:26:30,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:30,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2024-11-23 23:26:30,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=11008, Unknown=0, NotChecked=0, Total=11342 [2024-11-23 23:26:30,726 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) [2024-11-23 23:26:56,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:26:56,769 INFO L93 Difference]: Finished difference Result 890 states and 1050 transitions. [2024-11-23 23:26:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2024-11-23 23:26:56,769 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 [2024-11-23 23:26:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:26:56,770 INFO L225 Difference]: With dead ends: 890 [2024-11-23 23:26:56,770 INFO L226 Difference]: Without dead ends: 318 [2024-11-23 23:26:56,773 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23230 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=5033, Invalid=77623, Unknown=0, NotChecked=0, Total=82656 [2024-11-23 23:26:56,774 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 2178 mSDsluCounter, 6041 mSDsCounter, 0 mSdLazyCounter, 10496 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2178 SdHoareTripleChecker+Valid, 6135 SdHoareTripleChecker+Invalid, 10529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 10496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:26:56,774 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2178 Valid, 6135 Invalid, 10529 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 10496 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2024-11-23 23:26:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2024-11-23 23:26:56,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 308. [2024-11-23 23:26:56,778 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) [2024-11-23 23:26:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 357 transitions. [2024-11-23 23:26:56,778 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 357 transitions. Word has length 181 [2024-11-23 23:26:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:26:56,778 INFO L471 AbstractCegarLoop]: Abstraction has 308 states and 357 transitions. [2024-11-23 23:26:56,778 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) [2024-11-23 23:26:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 357 transitions. [2024-11-23 23:26:56,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-23 23:26:56,779 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:26:56,780 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] [2024-11-23 23:26:56,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-23 23:26:56,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-23 23:26:56,980 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)] === [2024-11-23 23:26:56,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash 206582607, now seen corresponding path program 12 times [2024-11-23 23:26:56,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:56,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186035240] [2024-11-23 23:26:56,981 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:26:56,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:57,161 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-23 23:26:57,161 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:26:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 92 proven. 313 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-23 23:26:58,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:58,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186035240] [2024-11-23 23:26:58,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186035240] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:26:58,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242166229] [2024-11-23 23:26:58,702 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:26:58,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:26:58,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:26:58,704 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:26:58,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-23 23:27:00,093 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-23 23:27:00,093 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:27:00,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-23 23:27:00,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:27:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 117 proven. 288 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-23 23:27:00,946 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:27:02,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:27:02,007 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 [2024-11-23 23:27:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 117 proven. 288 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-23 23:27:02,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242166229] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:27:02,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:27:02,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 59 [2024-11-23 23:27:02,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395683213] [2024-11-23 23:27:02,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:27:02,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-23 23:27:02,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:27:02,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-23 23:27:02,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=3067, Unknown=0, NotChecked=0, Total=3540 [2024-11-23 23:27:02,827 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) [2024-11-23 23:27:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:27:04,674 INFO L93 Difference]: Finished difference Result 356 states and 408 transitions. [2024-11-23 23:27:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-23 23:27:04,675 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 [2024-11-23 23:27:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:27:04,676 INFO L225 Difference]: With dead ends: 356 [2024-11-23 23:27:04,676 INFO L226 Difference]: Without dead ends: 356 [2024-11-23 23:27:04,676 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=956, Invalid=5686, Unknown=0, NotChecked=0, Total=6642 [2024-11-23 23:27:04,677 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 286 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:27:04,677 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 995 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:27:04,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-11-23 23:27:04,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 315. [2024-11-23 23:27:04,679 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) [2024-11-23 23:27:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 367 transitions. [2024-11-23 23:27:04,680 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 367 transitions. Word has length 184 [2024-11-23 23:27:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:27:04,680 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 367 transitions. [2024-11-23 23:27:04,680 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) [2024-11-23 23:27:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 367 transitions. [2024-11-23 23:27:04,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2024-11-23 23:27:04,681 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:27:04,681 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] [2024-11-23 23:27:04,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-23 23:27:04,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-23 23:27:04,882 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)] === [2024-11-23 23:27:04,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:27:04,882 INFO L85 PathProgramCache]: Analyzing trace with hash 234318921, now seen corresponding path program 13 times [2024-11-23 23:27:04,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:27:04,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384947134] [2024-11-23 23:27:04,882 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:27:04,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:27:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:27:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 90 proven. 378 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-23 23:27:05,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:27:05,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384947134] [2024-11-23 23:27:05,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384947134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:27:05,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641017864] [2024-11-23 23:27:05,723 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:27:05,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:27:05,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:27:05,726 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:27:05,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-23 23:27:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:27:06,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 250 conjuncts are in the unsatisfiable core [2024-11-23 23:27:06,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:27:06,216 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 [2024-11-23 23:27:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 39 proven. 432 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-23 23:27:08,100 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:27:08,380 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 [2024-11-23 23:27:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 39 proven. 432 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-23 23:27:09,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641017864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:27:09,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:27:09,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29, 29] total 65 [2024-11-23 23:27:09,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541162573] [2024-11-23 23:27:09,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:27:09,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-23 23:27:09,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:27:09,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-23 23:27:09,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=4007, Unknown=0, NotChecked=0, Total=4160 [2024-11-23 23:27:09,778 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) [2024-11-23 23:27:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:27:14,958 INFO L93 Difference]: Finished difference Result 520 states and 614 transitions. [2024-11-23 23:27:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-23 23:27:14,959 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 [2024-11-23 23:27:14,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:27:14,959 INFO L225 Difference]: With dead ends: 520 [2024-11-23 23:27:14,959 INFO L226 Difference]: Without dead ends: 323 [2024-11-23 23:27:14,960 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=790, Invalid=10766, Unknown=0, NotChecked=0, Total=11556 [2024-11-23 23:27:14,960 INFO L435 NwaCegarLoop]: 157 mSDtfsCounter, 483 mSDsluCounter, 7142 mSDsCounter, 0 mSdLazyCounter, 4660 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 7299 SdHoareTripleChecker+Invalid, 4661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-23 23:27:14,960 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 7299 Invalid, 4661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4660 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-23 23:27:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-23 23:27:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 321. [2024-11-23 23:27:14,963 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) [2024-11-23 23:27:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 373 transitions. [2024-11-23 23:27:14,964 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 373 transitions. Word has length 191 [2024-11-23 23:27:14,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:27:14,964 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 373 transitions. [2024-11-23 23:27:14,964 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) [2024-11-23 23:27:14,964 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 373 transitions. [2024-11-23 23:27:14,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2024-11-23 23:27:14,965 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:27:14,965 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] [2024-11-23 23:27:14,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-23 23:27:15,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-23 23:27:15,167 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)] === [2024-11-23 23:27:15,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:27:15,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1506641232, now seen corresponding path program 14 times [2024-11-23 23:27:15,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:27:15,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743274335] [2024-11-23 23:27:15,167 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:27:15,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:27:15,235 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:27:15,235 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:27:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 117 proven. 383 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-23 23:27:17,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:27:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743274335] [2024-11-23 23:27:17,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743274335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:27:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786779626] [2024-11-23 23:27:17,164 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:27:17,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:27:17,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:27:17,166 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:27:17,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-23 23:27:17,639 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:27:17,639 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:27:17,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-23 23:27:17,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:27:17,663 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 [2024-11-23 23:27:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 145 proven. 355 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-23 23:27:19,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:27:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 155 proven. 345 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-23 23:27:22,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786779626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:27:22,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:27:22,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 68 [2024-11-23 23:27:22,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79975140] [2024-11-23 23:27:22,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:27:22,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-23 23:27:22,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:27:22,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-23 23:27:22,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=4110, Unknown=0, NotChecked=0, Total=4692 [2024-11-23 23:27:22,244 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) [2024-11-23 23:27:26,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:27:26,097 INFO L93 Difference]: Finished difference Result 373 states and 428 transitions. [2024-11-23 23:27:26,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-23 23:27:26,098 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 [2024-11-23 23:27:26,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:27:26,099 INFO L225 Difference]: With dead ends: 373 [2024-11-23 23:27:26,099 INFO L226 Difference]: Without dead ends: 373 [2024-11-23 23:27:26,100 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2502 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1447, Invalid=9059, Unknown=0, NotChecked=0, Total=10506 [2024-11-23 23:27:26,100 INFO L435 NwaCegarLoop]: 122 mSDtfsCounter, 1079 mSDsluCounter, 2760 mSDsCounter, 0 mSdLazyCounter, 2723 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 2882 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:27:26,101 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 2882 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2723 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-23 23:27:26,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2024-11-23 23:27:26,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 328. [2024-11-23 23:27:26,104 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) [2024-11-23 23:27:26,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 383 transitions. [2024-11-23 23:27:26,104 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 383 transitions. Word has length 194 [2024-11-23 23:27:26,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:27:26,104 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 383 transitions. [2024-11-23 23:27:26,105 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) [2024-11-23 23:27:26,105 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 383 transitions. [2024-11-23 23:27:26,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2024-11-23 23:27:26,105 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:27:26,105 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] [2024-11-23 23:27:26,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-11-23 23:27:26,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-23 23:27:26,306 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)] === [2024-11-23 23:27:26,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:27:26,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1843722456, now seen corresponding path program 15 times [2024-11-23 23:27:26,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:27:26,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501836279] [2024-11-23 23:27:26,307 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:27:26,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:27:26,488 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-23 23:27:26,488 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:27:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 127 proven. 181 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2024-11-23 23:27:28,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:27:28,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501836279] [2024-11-23 23:27:28,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501836279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:27:28,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793503067] [2024-11-23 23:27:28,259 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:27:28,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:27:28,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:27:28,261 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:27:28,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-23 23:27:30,045 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-23 23:27:30,045 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:27:30,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-23 23:27:30,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:27:30,933 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 [2024-11-23 23:27:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 69 proven. 230 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2024-11-23 23:27:31,506 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:27:32,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-23 23:27:32,076 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 [2024-11-23 23:27:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 69 proven. 230 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2024-11-23 23:27:32,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793503067] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:27:32,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:27:32,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 25] total 76 [2024-11-23 23:27:32,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975538956] [2024-11-23 23:27:32,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:27:32,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-23 23:27:32,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:27:32,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-23 23:27:32,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=5386, Unknown=0, NotChecked=0, Total=5700 [2024-11-23 23:27:32,694 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) [2024-11-23 23:27:36,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:27:36,088 INFO L93 Difference]: Finished difference Result 402 states and 457 transitions. [2024-11-23 23:27:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-23 23:27:36,089 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 [2024-11-23 23:27:36,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:27:36,090 INFO L225 Difference]: With dead ends: 402 [2024-11-23 23:27:36,090 INFO L226 Difference]: Without dead ends: 342 [2024-11-23 23:27:36,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3700 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=761, Invalid=11229, Unknown=0, NotChecked=0, Total=11990 [2024-11-23 23:27:36,091 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 114 mSDsluCounter, 2522 mSDsCounter, 0 mSdLazyCounter, 2615 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2580 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:27:36,091 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 2580 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2615 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-23 23:27:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-23 23:27:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 336. [2024-11-23 23:27:36,095 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) [2024-11-23 23:27:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 391 transitions. [2024-11-23 23:27:36,096 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 391 transitions. Word has length 201 [2024-11-23 23:27:36,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:27:36,096 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 391 transitions. [2024-11-23 23:27:36,096 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) [2024-11-23 23:27:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 391 transitions. [2024-11-23 23:27:36,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2024-11-23 23:27:36,097 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:27:36,097 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] [2024-11-23 23:27:36,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-23 23:27:36,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:27:36,298 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)] === [2024-11-23 23:27:36,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:27:36,298 INFO L85 PathProgramCache]: Analyzing trace with hash 372247247, now seen corresponding path program 16 times [2024-11-23 23:27:36,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:27:36,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611981922] [2024-11-23 23:27:36,299 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:27:36,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:27:36,365 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:27:36,365 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:27:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 43 proven. 530 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-23 23:27:37,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:27:37,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611981922] [2024-11-23 23:27:37,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611981922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:27:37,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506754718] [2024-11-23 23:27:37,941 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:27:37,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:27:37,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:27:37,943 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:27:37,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-23 23:27:38,452 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:27:38,452 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:27:38,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 267 conjuncts are in the unsatisfiable core [2024-11-23 23:27:38,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:27:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 43 proven. 530 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-23 23:27:38,852 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:27:39,006 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 [2024-11-23 23:27:39,224 INFO L349 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2024-11-23 23:27:39,224 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 [2024-11-23 23:27:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 43 proven. 530 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-23 23:27:39,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506754718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:27:39,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:27:39,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 37 [2024-11-23 23:27:39,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191034539] [2024-11-23 23:27:39,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:27:39,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-23 23:27:39,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:27:39,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-23 23:27:39,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2024-11-23 23:27:39,351 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) [2024-11-23 23:27:41,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:27:41,439 INFO L93 Difference]: Finished difference Result 520 states and 624 transitions. [2024-11-23 23:27:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-23 23:27:41,439 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 [2024-11-23 23:27:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:27:41,440 INFO L225 Difference]: With dead ends: 520 [2024-11-23 23:27:41,440 INFO L226 Difference]: Without dead ends: 344 [2024-11-23 23:27:41,440 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=178, Invalid=2792, Unknown=0, NotChecked=0, Total=2970 [2024-11-23 23:27:41,440 INFO L435 NwaCegarLoop]: 158 mSDtfsCounter, 204 mSDsluCounter, 4239 mSDsCounter, 0 mSdLazyCounter, 2698 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 4397 SdHoareTripleChecker+Invalid, 2698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:27:41,441 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 4397 Invalid, 2698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2698 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-23 23:27:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2024-11-23 23:27:41,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 342. [2024-11-23 23:27:41,444 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) [2024-11-23 23:27:41,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 397 transitions. [2024-11-23 23:27:41,445 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 397 transitions. Word has length 205 [2024-11-23 23:27:41,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:27:41,445 INFO L471 AbstractCegarLoop]: Abstraction has 342 states and 397 transitions. [2024-11-23 23:27:41,445 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) [2024-11-23 23:27:41,446 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 397 transitions. [2024-11-23 23:27:41,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-11-23 23:27:41,447 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:27:41,447 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] [2024-11-23 23:27:41,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-11-23 23:27:41,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2024-11-23 23:27:41,647 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)] === [2024-11-23 23:27:41,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:27:41,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2073741928, now seen corresponding path program 17 times [2024-11-23 23:27:41,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:27:41,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217928626] [2024-11-23 23:27:41,648 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:27:41,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:27:41,794 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-23 23:27:41,794 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:27:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 33 proven. 572 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-23 23:27:42,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:27:42,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217928626] [2024-11-23 23:27:42,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217928626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:27:42,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125957498] [2024-11-23 23:27:42,647 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:27:42,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:27:42,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:27:42,649 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:27:42,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-23 23:27:43,645 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-23 23:27:43,646 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:27:43,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-11-23 23:27:43,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:27:43,664 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 [2024-11-23 23:27:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 176 proven. 429 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-23 23:27:45,958 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:27:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 187 proven. 418 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-23 23:27:49,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125957498] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:27:49,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:27:49,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 84 [2024-11-23 23:27:49,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249432005] [2024-11-23 23:27:49,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:27:49,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-23 23:27:49,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:27:49,313 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-23 23:27:49,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=6464, Unknown=0, NotChecked=0, Total=6972 [2024-11-23 23:27:49,314 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) [2024-11-23 23:27:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:27:58,022 INFO L93 Difference]: Finished difference Result 631 states and 737 transitions. [2024-11-23 23:27:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-23 23:27:58,022 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 [2024-11-23 23:27:58,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:27:58,023 INFO L225 Difference]: With dead ends: 631 [2024-11-23 23:27:58,023 INFO L226 Difference]: Without dead ends: 402 [2024-11-23 23:27:58,025 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5364 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=2763, Invalid=25967, Unknown=0, NotChecked=0, Total=28730 [2024-11-23 23:27:58,025 INFO L435 NwaCegarLoop]: 149 mSDtfsCounter, 2847 mSDsluCounter, 5756 mSDsCounter, 0 mSdLazyCounter, 6410 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2847 SdHoareTripleChecker+Valid, 5905 SdHoareTripleChecker+Invalid, 6411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:27:58,026 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2847 Valid, 5905 Invalid, 6411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6410 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-23 23:27:58,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2024-11-23 23:27:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 355. [2024-11-23 23:27:58,028 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) [2024-11-23 23:27:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 413 transitions. [2024-11-23 23:27:58,029 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 413 transitions. Word has length 208 [2024-11-23 23:27:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:27:58,029 INFO L471 AbstractCegarLoop]: Abstraction has 355 states and 413 transitions. [2024-11-23 23:27:58,029 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) [2024-11-23 23:27:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 413 transitions. [2024-11-23 23:27:58,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2024-11-23 23:27:58,030 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:27:58,030 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] [2024-11-23 23:27:58,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-23 23:27:58,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:27:58,230 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)] === [2024-11-23 23:27:58,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:27:58,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1960389481, now seen corresponding path program 18 times [2024-11-23 23:27:58,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:27:58,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191016198] [2024-11-23 23:27:58,231 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:27:58,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:27:58,386 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-23 23:27:58,386 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:28:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 307 proven. 153 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2024-11-23 23:28:00,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:00,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191016198] [2024-11-23 23:28:00,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191016198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:00,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661083965] [2024-11-23 23:28:00,275 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:28:00,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:00,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:28:00,278 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:28:00,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-23 23:28:02,301 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-23 23:28:02,301 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:28:02,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-11-23 23:28:02,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:28:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 210 proven. 510 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-23 23:28:03,814 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:28:05,231 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:28:05,231 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 [2024-11-23 23:28:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 210 proven. 510 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-23 23:28:06,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661083965] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:28:06,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:28:06,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 30] total 85 [2024-11-23 23:28:06,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991057133] [2024-11-23 23:28:06,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:28:06,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-23 23:28:06,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:28:06,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-23 23:28:06,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=6461, Unknown=0, NotChecked=0, Total=7140 [2024-11-23 23:28:06,342 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) [2024-11-23 23:28:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:28:13,787 INFO L93 Difference]: Finished difference Result 593 states and 675 transitions. [2024-11-23 23:28:13,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2024-11-23 23:28:13,787 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 [2024-11-23 23:28:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:28:13,788 INFO L225 Difference]: With dead ends: 593 [2024-11-23 23:28:13,788 INFO L226 Difference]: Without dead ends: 593 [2024-11-23 23:28:13,789 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8199 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=3155, Invalid=22927, Unknown=0, NotChecked=0, Total=26082 [2024-11-23 23:28:13,789 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 850 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 2559 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:28:13,789 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 2082 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2559 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-23 23:28:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2024-11-23 23:28:13,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 504. [2024-11-23 23:28:13,793 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) [2024-11-23 23:28:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 586 transitions. [2024-11-23 23:28:13,793 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 586 transitions. Word has length 218 [2024-11-23 23:28:13,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:28:13,793 INFO L471 AbstractCegarLoop]: Abstraction has 504 states and 586 transitions. [2024-11-23 23:28:13,793 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) [2024-11-23 23:28:13,793 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 586 transitions. [2024-11-23 23:28:13,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2024-11-23 23:28:13,794 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:28:13,795 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] [2024-11-23 23:28:13,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-23 23:28:13,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:13,995 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)] === [2024-11-23 23:28:13,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:28:13,995 INFO L85 PathProgramCache]: Analyzing trace with hash 897964163, now seen corresponding path program 1 times [2024-11-23 23:28:13,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:28:13,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999025102] [2024-11-23 23:28:13,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:13,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:28:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 120 proven. 684 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-23 23:28:15,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:15,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999025102] [2024-11-23 23:28:15,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999025102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:15,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968270499] [2024-11-23 23:28:15,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:15,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:15,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:28:15,059 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:28:15,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-23 23:28:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:15,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 318 conjuncts are in the unsatisfiable core [2024-11-23 23:28:15,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:28:15,535 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 [2024-11-23 23:28:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 51 proven. 756 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-23 23:28:18,070 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:28:18,358 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 [2024-11-23 23:28:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 51 proven. 756 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-23 23:28:20,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968270499] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:28:20,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:28:20,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 35, 35] total 80 [2024-11-23 23:28:20,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25932754] [2024-11-23 23:28:20,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:28:20,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-23 23:28:20,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:28:20,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-23 23:28:20,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=6131, Unknown=0, NotChecked=0, Total=6320 [2024-11-23 23:28:20,186 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) [2024-11-23 23:28:27,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:28:27,824 INFO L93 Difference]: Finished difference Result 812 states and 963 transitions. [2024-11-23 23:28:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-23 23:28:27,825 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 [2024-11-23 23:28:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:28:27,827 INFO L225 Difference]: With dead ends: 812 [2024-11-23 23:28:27,827 INFO L226 Difference]: Without dead ends: 516 [2024-11-23 23:28:27,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1129, Invalid=16961, Unknown=0, NotChecked=0, Total=18090 [2024-11-23 23:28:27,828 INFO L435 NwaCegarLoop]: 199 mSDtfsCounter, 3848 mSDsluCounter, 11035 mSDsCounter, 0 mSdLazyCounter, 7300 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3848 SdHoareTripleChecker+Valid, 11234 SdHoareTripleChecker+Invalid, 7301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:28:27,828 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3848 Valid, 11234 Invalid, 7301 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 7300 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-23 23:28:27,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2024-11-23 23:28:27,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 513. [2024-11-23 23:28:27,831 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) [2024-11-23 23:28:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 595 transitions. [2024-11-23 23:28:27,832 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 595 transitions. Word has length 226 [2024-11-23 23:28:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:28:27,832 INFO L471 AbstractCegarLoop]: Abstraction has 513 states and 595 transitions. [2024-11-23 23:28:27,832 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) [2024-11-23 23:28:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 595 transitions. [2024-11-23 23:28:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-11-23 23:28:27,834 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:28:27,834 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] [2024-11-23 23:28:27,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-11-23 23:28:28,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:28,034 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)] === [2024-11-23 23:28:28,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:28:28,035 INFO L85 PathProgramCache]: Analyzing trace with hash 543759516, now seen corresponding path program 2 times [2024-11-23 23:28:28,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:28:28,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242808203] [2024-11-23 23:28:28,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:28:28,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:28:28,101 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:28:28,101 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:28:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 210 proven. 635 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-23 23:28:30,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:30,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242808203] [2024-11-23 23:28:30,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242808203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:30,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063365133] [2024-11-23 23:28:30,729 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:28:30,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:30,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:28:30,731 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:28:30,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-23 23:28:31,201 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:28:31,201 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:28:31,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-11-23 23:28:31,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:28:31,217 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 [2024-11-23 23:28:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 247 proven. 598 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-23 23:28:32,947 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:28:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 260 proven. 585 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-23 23:28:36,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063365133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:28:36,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:28:36,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 82 [2024-11-23 23:28:36,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101912931] [2024-11-23 23:28:36,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:28:36,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-23 23:28:36,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:28:36,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-23 23:28:36,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=5880, Unknown=0, NotChecked=0, Total=6806 [2024-11-23 23:28:36,158 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) [2024-11-23 23:28:40,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:28:40,360 INFO L93 Difference]: Finished difference Result 579 states and 664 transitions. [2024-11-23 23:28:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-23 23:28:40,361 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 [2024-11-23 23:28:40,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:28:40,362 INFO L225 Difference]: With dead ends: 579 [2024-11-23 23:28:40,362 INFO L226 Difference]: Without dead ends: 579 [2024-11-23 23:28:40,363 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3214 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1792, Invalid=10864, Unknown=0, NotChecked=0, Total=12656 [2024-11-23 23:28:40,363 INFO L435 NwaCegarLoop]: 149 mSDtfsCounter, 749 mSDsluCounter, 3997 mSDsCounter, 0 mSdLazyCounter, 3966 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 4146 SdHoareTripleChecker+Invalid, 3966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:28:40,363 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 4146 Invalid, 3966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3966 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-23 23:28:40,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2024-11-23 23:28:40,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 520. [2024-11-23 23:28:40,367 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) [2024-11-23 23:28:40,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 605 transitions. [2024-11-23 23:28:40,368 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 605 transitions. Word has length 229 [2024-11-23 23:28:40,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:28:40,368 INFO L471 AbstractCegarLoop]: Abstraction has 520 states and 605 transitions. [2024-11-23 23:28:40,368 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) [2024-11-23 23:28:40,368 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 605 transitions. [2024-11-23 23:28:40,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2024-11-23 23:28:40,369 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:28:40,369 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] [2024-11-23 23:28:40,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-11-23 23:28:40,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:40,569 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)] === [2024-11-23 23:28:40,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:28:40,570 INFO L85 PathProgramCache]: Analyzing trace with hash -546250148, now seen corresponding path program 3 times [2024-11-23 23:28:40,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:28:40,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941278615] [2024-11-23 23:28:40,570 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:28:40,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:28:40,711 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-23 23:28:40,711 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:28:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 260 proven. 190 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2024-11-23 23:28:42,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:42,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941278615] [2024-11-23 23:28:42,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941278615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:42,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507631120] [2024-11-23 23:28:42,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:28:42,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:42,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:28:42,250 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:28:42,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-23 23:28:44,174 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-23 23:28:44,174 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:28:44,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-23 23:28:44,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:28:44,576 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 [2024-11-23 23:28:45,061 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 [2024-11-23 23:28:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 130 proven. 290 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-11-23 23:28:45,104 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:28:45,168 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 [2024-11-23 23:28:45,170 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 [2024-11-23 23:28:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 130 proven. 290 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-11-23 23:28:45,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507631120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:28:45,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:28:45,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 27, 27] total 60 [2024-11-23 23:28:45,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419348669] [2024-11-23 23:28:45,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:28:45,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-23 23:28:45,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:28:45,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-23 23:28:45,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3239, Unknown=0, NotChecked=0, Total=3540 [2024-11-23 23:28:45,354 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) [2024-11-23 23:28:47,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:28:47,981 INFO L93 Difference]: Finished difference Result 640 states and 725 transitions. [2024-11-23 23:28:47,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-23 23:28:47,982 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 [2024-11-23 23:28:47,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:28:47,983 INFO L225 Difference]: With dead ends: 640 [2024-11-23 23:28:47,983 INFO L226 Difference]: Without dead ends: 541 [2024-11-23 23:28:47,984 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2722 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=699, Invalid=8231, Unknown=0, NotChecked=0, Total=8930 [2024-11-23 23:28:47,984 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 98 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1852 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:28:47,984 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 1852 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-23 23:28:47,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2024-11-23 23:28:47,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 532. [2024-11-23 23:28:47,988 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) [2024-11-23 23:28:47,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 617 transitions. [2024-11-23 23:28:47,988 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 617 transitions. Word has length 236 [2024-11-23 23:28:47,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:28:47,989 INFO L471 AbstractCegarLoop]: Abstraction has 532 states and 617 transitions. [2024-11-23 23:28:47,989 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) [2024-11-23 23:28:47,989 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 617 transitions. [2024-11-23 23:28:47,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2024-11-23 23:28:47,990 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:28:47,990 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] [2024-11-23 23:28:48,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-11-23 23:28:48,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:48,191 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)] === [2024-11-23 23:28:48,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:28:48,191 INFO L85 PathProgramCache]: Analyzing trace with hash 955737429, now seen corresponding path program 4 times [2024-11-23 23:28:48,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:28:48,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434419400] [2024-11-23 23:28:48,191 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:28:48,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:28:48,289 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:28:48,289 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:28:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 55 proven. 884 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-23 23:28:50,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:50,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434419400] [2024-11-23 23:28:50,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434419400] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:50,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717340551] [2024-11-23 23:28:50,505 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:28:50,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:50,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:28:50,507 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:28:50,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-23 23:28:51,156 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:28:51,156 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:28:51,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 335 conjuncts are in the unsatisfiable core [2024-11-23 23:28:51,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:28:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 55 proven. 884 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-23 23:28:52,527 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:28:52,734 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 [2024-11-23 23:28:53,022 INFO L349 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2024-11-23 23:28:53,022 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 [2024-11-23 23:28:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 55 proven. 884 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-23 23:28:53,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717340551] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:28:53,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:28:53,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 57 [2024-11-23 23:28:53,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946596218] [2024-11-23 23:28:53,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:28:53,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-23 23:28:53,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:28:53,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-23 23:28:53,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=3057, Unknown=0, NotChecked=0, Total=3192 [2024-11-23 23:28:53,183 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) [2024-11-23 23:28:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:28:56,341 INFO L93 Difference]: Finished difference Result 804 states and 966 transitions. [2024-11-23 23:28:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-23 23:28:56,341 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 [2024-11-23 23:28:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:28:56,343 INFO L225 Difference]: With dead ends: 804 [2024-11-23 23:28:56,343 INFO L226 Difference]: Without dead ends: 544 [2024-11-23 23:28:56,343 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=249, Invalid=5757, Unknown=0, NotChecked=0, Total=6006 [2024-11-23 23:28:56,343 INFO L435 NwaCegarLoop]: 194 mSDtfsCounter, 257 mSDsluCounter, 7404 mSDsCounter, 0 mSdLazyCounter, 4151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 7598 SdHoareTripleChecker+Invalid, 4151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:28:56,343 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 7598 Invalid, 4151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4151 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-23 23:28:56,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2024-11-23 23:28:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 541. [2024-11-23 23:28:56,346 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) [2024-11-23 23:28:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 626 transitions. [2024-11-23 23:28:56,347 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 626 transitions. Word has length 240 [2024-11-23 23:28:56,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:28:56,347 INFO L471 AbstractCegarLoop]: Abstraction has 541 states and 626 transitions. [2024-11-23 23:28:56,347 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) [2024-11-23 23:28:56,347 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 626 transitions. [2024-11-23 23:28:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2024-11-23 23:28:56,348 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:28:56,348 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] [2024-11-23 23:28:56,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-11-23 23:28:56,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:56,549 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)] === [2024-11-23 23:28:56,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:28:56,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1084754332, now seen corresponding path program 5 times [2024-11-23 23:28:56,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:28:56,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536601374] [2024-11-23 23:28:56,549 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:28:56,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:28:56,681 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-23 23:28:56,681 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:28:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 42 proven. 938 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-23 23:28:58,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:58,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536601374] [2024-11-23 23:28:58,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536601374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:58,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154691094] [2024-11-23 23:28:58,031 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:28:58,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:58,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:28:58,034 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:28:58,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-23 23:28:58,986 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-23 23:28:58,986 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:28:58,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-11-23 23:28:58,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:28:59,004 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 [2024-11-23 23:29:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 287 proven. 693 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-23 23:29:01,835 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 301 proven. 679 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-23 23:29:06,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154691094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:06,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:06,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 102 [2024-11-23 23:29:06,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780363404] [2024-11-23 23:29:06,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:06,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2024-11-23 23:29:06,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:06,268 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2024-11-23 23:29:06,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=718, Invalid=9584, Unknown=0, NotChecked=0, Total=10302 [2024-11-23 23:29:06,269 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) [2024-11-23 23:29:17,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:29:17,808 INFO L93 Difference]: Finished difference Result 945 states and 1108 transitions. [2024-11-23 23:29:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2024-11-23 23:29:17,808 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 [2024-11-23 23:29:17,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:29:17,809 INFO L225 Difference]: With dead ends: 945 [2024-11-23 23:29:17,809 INFO L226 Difference]: Without dead ends: 617 [2024-11-23 23:29:17,811 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8322 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=3963, Invalid=39509, Unknown=0, NotChecked=0, Total=43472 [2024-11-23 23:29:17,811 INFO L435 NwaCegarLoop]: 182 mSDtfsCounter, 3064 mSDsluCounter, 8783 mSDsCounter, 0 mSdLazyCounter, 9697 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3064 SdHoareTripleChecker+Valid, 8965 SdHoareTripleChecker+Invalid, 9698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:29:17,812 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3064 Valid, 8965 Invalid, 9698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9697 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-23 23:29:17,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2024-11-23 23:29:17,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 557. [2024-11-23 23:29:17,815 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) [2024-11-23 23:29:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 645 transitions. [2024-11-23 23:29:17,816 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 645 transitions. Word has length 243 [2024-11-23 23:29:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:29:17,816 INFO L471 AbstractCegarLoop]: Abstraction has 557 states and 645 transitions. [2024-11-23 23:29:17,816 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) [2024-11-23 23:29:17,816 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 645 transitions. [2024-11-23 23:29:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2024-11-23 23:29:17,817 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:29:17,817 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] [2024-11-23 23:29:17,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-11-23 23:29:18,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:18,017 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)] === [2024-11-23 23:29:18,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:18,018 INFO L85 PathProgramCache]: Analyzing trace with hash 228494563, now seen corresponding path program 6 times [2024-11-23 23:29:18,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:18,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781053203] [2024-11-23 23:29:18,018 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:29:18,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:18,136 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-23 23:29:18,136 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 513 proven. 68 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2024-11-23 23:29:19,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:19,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781053203] [2024-11-23 23:29:19,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781053203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:19,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551212027] [2024-11-23 23:29:19,411 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:29:19,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:19,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:19,413 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:19,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-11-23 23:29:20,857 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-23 23:29:20,857 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:20,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-23 23:29:20,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:21,279 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 [2024-11-23 23:29:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 312 proven. 110 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2024-11-23 23:29:21,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:22,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-23 23:29:22,460 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 [2024-11-23 23:29:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 312 proven. 110 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2024-11-23 23:29:22,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551212027] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:22,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:22,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 60 [2024-11-23 23:29:22,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329656744] [2024-11-23 23:29:22,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:22,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-23 23:29:22,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:22,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-23 23:29:22,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3337, Unknown=0, NotChecked=0, Total=3540 [2024-11-23 23:29:22,969 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) [2024-11-23 23:29:25,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:29:25,628 INFO L93 Difference]: Finished difference Result 674 states and 787 transitions. [2024-11-23 23:29:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-23 23:29:25,628 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 [2024-11-23 23:29:25,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:29:25,630 INFO L225 Difference]: With dead ends: 674 [2024-11-23 23:29:25,630 INFO L226 Difference]: Without dead ends: 415 [2024-11-23 23:29:25,631 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=536, Invalid=7654, Unknown=0, NotChecked=0, Total=8190 [2024-11-23 23:29:25,631 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 288 mSDsluCounter, 3262 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 3348 SdHoareTripleChecker+Invalid, 2598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:29:25,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 3348 Invalid, 2598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-23 23:29:25,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2024-11-23 23:29:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2024-11-23 23:29:25,633 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) [2024-11-23 23:29:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 486 transitions. [2024-11-23 23:29:25,634 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 486 transitions. Word has length 253 [2024-11-23 23:29:25,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:29:25,634 INFO L471 AbstractCegarLoop]: Abstraction has 415 states and 486 transitions. [2024-11-23 23:29:25,634 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) [2024-11-23 23:29:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 486 transitions. [2024-11-23 23:29:25,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2024-11-23 23:29:25,635 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:29:25,636 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] [2024-11-23 23:29:25,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-11-23 23:29:25,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:25,836 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)] === [2024-11-23 23:29:25,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:25,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1369149094, now seen corresponding path program 19 times [2024-11-23 23:29:25,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:25,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371398399] [2024-11-23 23:29:25,837 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:29:25,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 287 proven. 838 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-23 23:29:28,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:28,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371398399] [2024-11-23 23:29:28,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371398399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:28,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888295492] [2024-11-23 23:29:28,800 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:29:28,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:28,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:28,801 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:28,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-23 23:29:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:29,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 199 conjuncts are in the unsatisfiable core [2024-11-23 23:29:29,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:29,321 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 [2024-11-23 23:29:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 330 proven. 795 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-23 23:29:31,013 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 345 proven. 780 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-23 23:29:34,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888295492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:34,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:34,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 92 [2024-11-23 23:29:34,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129649094] [2024-11-23 23:29:34,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:34,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-23 23:29:34,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:34,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-23 23:29:34,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1100, Invalid=7456, Unknown=0, NotChecked=0, Total=8556 [2024-11-23 23:29:34,337 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) [2024-11-23 23:29:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:29:39,349 INFO L93 Difference]: Finished difference Result 487 states and 561 transitions. [2024-11-23 23:29:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-23 23:29:39,350 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 [2024-11-23 23:29:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:29:39,352 INFO L225 Difference]: With dead ends: 487 [2024-11-23 23:29:39,352 INFO L226 Difference]: Without dead ends: 487 [2024-11-23 23:29:39,353 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4976 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2803, Invalid=17219, Unknown=0, NotChecked=0, Total=20022 [2024-11-23 23:29:39,354 INFO L435 NwaCegarLoop]: 167 mSDtfsCounter, 1344 mSDsluCounter, 4477 mSDsCounter, 0 mSdLazyCounter, 4629 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 4644 SdHoareTripleChecker+Invalid, 4629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:29:39,354 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1344 Valid, 4644 Invalid, 4629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4629 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-23 23:29:39,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2024-11-23 23:29:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 422. [2024-11-23 23:29:39,358 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) [2024-11-23 23:29:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 496 transitions. [2024-11-23 23:29:39,359 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 496 transitions. Word has length 256 [2024-11-23 23:29:39,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:29:39,360 INFO L471 AbstractCegarLoop]: Abstraction has 422 states and 496 transitions. [2024-11-23 23:29:39,360 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) [2024-11-23 23:29:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 496 transitions. [2024-11-23 23:29:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2024-11-23 23:29:39,361 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:29:39,361 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] [2024-11-23 23:29:39,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-11-23 23:29:39,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:39,562 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)] === [2024-11-23 23:29:39,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:39,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1393665058, now seen corresponding path program 20 times [2024-11-23 23:29:39,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:39,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686514038] [2024-11-23 23:29:39,563 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:29:39,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:39,672 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:29:39,673 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 150 proven. 1080 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2024-11-23 23:29:41,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:41,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686514038] [2024-11-23 23:29:41,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686514038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:41,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634561635] [2024-11-23 23:29:41,273 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:29:41,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:41,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:41,275 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:41,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-23 23:29:41,903 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:29:41,903 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:41,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 388 conjuncts are in the unsatisfiable core [2024-11-23 23:29:41,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:42,234 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 [2024-11-23 23:29:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 63 proven. 1170 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-23 23:29:47,680 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:48,127 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 [2024-11-23 23:29:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 63 proven. 1170 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-23 23:29:53,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634561635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:53,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:53,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 59, 41] total 131 [2024-11-23 23:29:53,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079455264] [2024-11-23 23:29:53,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:53,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-11-23 23:29:53,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:53,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-11-23 23:29:53,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=16646, Unknown=0, NotChecked=0, Total=17030 [2024-11-23 23:29:53,064 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) [2024-11-23 23:30:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:13,982 INFO L93 Difference]: Finished difference Result 985 states and 1168 transitions. [2024-11-23 23:30:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2024-11-23 23:30:13,983 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 [2024-11-23 23:30:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:13,985 INFO L225 Difference]: With dead ends: 985 [2024-11-23 23:30:13,985 INFO L226 Difference]: Without dead ends: 432 [2024-11-23 23:30:13,987 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14950 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=4015, Invalid=72437, Unknown=0, NotChecked=0, Total=76452 [2024-11-23 23:30:13,987 INFO L435 NwaCegarLoop]: 190 mSDtfsCounter, 3093 mSDsluCounter, 14237 mSDsCounter, 0 mSdLazyCounter, 16167 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3093 SdHoareTripleChecker+Valid, 14427 SdHoareTripleChecker+Invalid, 16169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:13,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3093 Valid, 14427 Invalid, 16169 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 16167 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2024-11-23 23:30:13,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2024-11-23 23:30:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 428. [2024-11-23 23:30:13,991 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) [2024-11-23 23:30:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 502 transitions. [2024-11-23 23:30:13,992 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 502 transitions. Word has length 263 [2024-11-23 23:30:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:13,992 INFO L471 AbstractCegarLoop]: Abstraction has 428 states and 502 transitions. [2024-11-23 23:30:13,992 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) [2024-11-23 23:30:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 502 transitions. [2024-11-23 23:30:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2024-11-23 23:30:13,993 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:13,993 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] [2024-11-23 23:30:14,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-11-23 23:30:14,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:14,194 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)] === [2024-11-23 23:30:14,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:14,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1459105883, now seen corresponding path program 21 times [2024-11-23 23:30:14,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:14,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681368241] [2024-11-23 23:30:14,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:30:14,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:14,397 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-23 23:30:14,397 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:30:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 516 proven. 459 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2024-11-23 23:30:16,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:16,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681368241] [2024-11-23 23:30:16,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681368241] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:16,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873201165] [2024-11-23 23:30:16,806 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:30:16,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:16,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:16,808 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:16,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-11-23 23:30:19,236 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-23 23:30:19,236 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:30:19,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 175 conjuncts are in the unsatisfiable core [2024-11-23 23:30:19,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 376 proven. 904 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-23 23:30:21,575 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:30:23,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:30:23,603 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 [2024-11-23 23:30:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 376 proven. 904 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-23 23:30:25,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873201165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:30:25,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:30:25,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 38, 38] total 108 [2024-11-23 23:30:25,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471820575] [2024-11-23 23:30:25,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:30:25,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-11-23 23:30:25,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:25,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-11-23 23:30:25,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=10429, Unknown=0, NotChecked=0, Total=11556 [2024-11-23 23:30:25,369 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) [2024-11-23 23:30:34,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:34,107 INFO L93 Difference]: Finished difference Result 720 states and 825 transitions. [2024-11-23 23:30:34,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-11-23 23:30:34,107 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 [2024-11-23 23:30:34,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:34,108 INFO L225 Difference]: With dead ends: 720 [2024-11-23 23:30:34,108 INFO L226 Difference]: Without dead ends: 355 [2024-11-23 23:30:34,111 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13176 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=5259, Invalid=39051, Unknown=0, NotChecked=0, Total=44310 [2024-11-23 23:30:34,112 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 1642 mSDsluCounter, 2485 mSDsCounter, 0 mSdLazyCounter, 2975 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1642 SdHoareTripleChecker+Valid, 2584 SdHoareTripleChecker+Invalid, 3035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:34,112 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1642 Valid, 2584 Invalid, 3035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2975 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-23 23:30:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2024-11-23 23:30:34,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 285. [2024-11-23 23:30:34,115 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) [2024-11-23 23:30:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 341 transitions. [2024-11-23 23:30:34,116 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 341 transitions. Word has length 266 [2024-11-23 23:30:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:34,116 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 341 transitions. [2024-11-23 23:30:34,116 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) [2024-11-23 23:30:34,117 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 341 transitions. [2024-11-23 23:30:34,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2024-11-23 23:30:34,118 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:34,118 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] [2024-11-23 23:30:34,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-11-23 23:30:34,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:34,318 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)] === [2024-11-23 23:30:34,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:34,319 INFO L85 PathProgramCache]: Analyzing trace with hash -536395484, now seen corresponding path program 22 times [2024-11-23 23:30:34,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:34,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673746876] [2024-11-23 23:30:34,319 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:30:34,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:34,401 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:30:34,401 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:30:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 67 proven. 1328 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-23 23:30:37,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:37,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673746876] [2024-11-23 23:30:37,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673746876] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:37,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383084828] [2024-11-23 23:30:37,423 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:30:37,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:37,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:37,425 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:37,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-23 23:30:38,056 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:30:38,056 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:30:38,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 387 conjuncts are in the unsatisfiable core [2024-11-23 23:30:38,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 67 proven. 1328 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-23 23:30:38,627 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:30:38,814 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 [2024-11-23 23:30:39,098 INFO L349 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2024-11-23 23:30:39,098 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 [2024-11-23 23:30:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 67 proven. 1328 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-23 23:30:39,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383084828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:30:39,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:30:39,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 49 [2024-11-23 23:30:39,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597166999] [2024-11-23 23:30:39,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:30:39,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-23 23:30:39,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:39,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-23 23:30:39,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2247, Unknown=0, NotChecked=0, Total=2352 [2024-11-23 23:30:39,290 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) [2024-11-23 23:30:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:43,089 INFO L93 Difference]: Finished difference Result 489 states and 597 transitions. [2024-11-23 23:30:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-23 23:30:43,090 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 [2024-11-23 23:30:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:43,091 INFO L225 Difference]: With dead ends: 489 [2024-11-23 23:30:43,091 INFO L226 Difference]: Without dead ends: 289 [2024-11-23 23:30:43,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=232, Invalid=5024, Unknown=0, NotChecked=0, Total=5256 [2024-11-23 23:30:43,091 INFO L435 NwaCegarLoop]: 230 mSDtfsCounter, 312 mSDsluCounter, 8664 mSDsCounter, 0 mSdLazyCounter, 5148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 8894 SdHoareTripleChecker+Invalid, 5148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:43,091 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 8894 Invalid, 5148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5148 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-23 23:30:43,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-23 23:30:43,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2024-11-23 23:30:43,093 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) [2024-11-23 23:30:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 344 transitions. [2024-11-23 23:30:43,093 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 344 transitions. Word has length 277 [2024-11-23 23:30:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:43,094 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 344 transitions. [2024-11-23 23:30:43,094 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) [2024-11-23 23:30:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 344 transitions. [2024-11-23 23:30:43,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2024-11-23 23:30:43,094 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:43,095 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] [2024-11-23 23:30:43,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2024-11-23 23:30:43,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:43,295 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)] === [2024-11-23 23:30:43,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:43,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1994268979, now seen corresponding path program 23 times [2024-11-23 23:30:43,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:43,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930933759] [2024-11-23 23:30:43,296 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:30:43,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:43,479 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-11-23 23:30:43,479 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:30:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 51 proven. 1394 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-23 23:30:44,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:44,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930933759] [2024-11-23 23:30:44,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930933759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:44,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018425540] [2024-11-23 23:30:44,991 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:30:44,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:44,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:44,993 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:44,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-11-23 23:30:45,942 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-11-23 23:30:45,942 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:30:45,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 224 conjuncts are in the unsatisfiable core [2024-11-23 23:30:45,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:45,967 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 [2024-11-23 23:30:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 425 proven. 1020 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-23 23:30:49,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:30:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 442 proven. 1003 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-23 23:30:55,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018425540] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:30:55,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:30:55,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 120 [2024-11-23 23:30:55,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813111611] [2024-11-23 23:30:55,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:30:55,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2024-11-23 23:30:55,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:55,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2024-11-23 23:30:55,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=13316, Unknown=0, NotChecked=0, Total=14280 [2024-11-23 23:30:55,378 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) [2024-11-23 23:31:11,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:31:11,906 INFO L93 Difference]: Finished difference Result 651 states and 762 transitions. [2024-11-23 23:31:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-11-23 23:31:11,906 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 [2024-11-23 23:31:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:31:11,907 INFO L225 Difference]: With dead ends: 651 [2024-11-23 23:31:11,907 INFO L226 Difference]: Without dead ends: 368 [2024-11-23 23:31:11,910 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11928 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=5370, Invalid=55886, Unknown=0, NotChecked=0, Total=61256 [2024-11-23 23:31:11,910 INFO L435 NwaCegarLoop]: 215 mSDtfsCounter, 4574 mSDsluCounter, 12110 mSDsCounter, 0 mSdLazyCounter, 13598 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4574 SdHoareTripleChecker+Valid, 12325 SdHoareTripleChecker+Invalid, 13599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:31:11,910 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4574 Valid, 12325 Invalid, 13599 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 13598 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2024-11-23 23:31:11,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-11-23 23:31:11,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 298. [2024-11-23 23:31:11,913 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) [2024-11-23 23:31:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 357 transitions. [2024-11-23 23:31:11,914 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 357 transitions. Word has length 280 [2024-11-23 23:31:11,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:31:11,914 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 357 transitions. [2024-11-23 23:31:11,915 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) [2024-11-23 23:31:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 357 transitions. [2024-11-23 23:31:11,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2024-11-23 23:31:11,916 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:31:11,916 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] [2024-11-23 23:31:11,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-11-23 23:31:12,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:31:12,117 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)] === [2024-11-23 23:31:12,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:31:12,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1862676276, now seen corresponding path program 24 times [2024-11-23 23:31:12,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:31:12,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900476505] [2024-11-23 23:31:12,117 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:31:12,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:31:12,330 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-23 23:31:12,330 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:31:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 814 proven. 194 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2024-11-23 23:31:14,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:31:14,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900476505] [2024-11-23 23:31:14,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900476505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:31:14,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235551900] [2024-11-23 23:31:14,648 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:31:14,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:31:14,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:31:14,652 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:31:14,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-11-23 23:31:17,853 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-23 23:31:17,853 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:31:17,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-11-23 23:31:17,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:31:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 477 proven. 1143 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-23 23:31:19,821 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:31:21,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:31:21,870 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 [2024-11-23 23:31:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 477 proven. 1143 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-23 23:31:23,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235551900] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:31:23,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:31:23,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 42, 42] total 112 [2024-11-23 23:31:23,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793853624] [2024-11-23 23:31:23,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:31:23,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-11-23 23:31:23,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:31:23,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-11-23 23:31:23,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=11100, Unknown=0, NotChecked=0, Total=12432 [2024-11-23 23:31:23,517 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) [2024-11-23 23:31:31,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:31:31,435 INFO L93 Difference]: Finished difference Result 604 states and 694 transitions. [2024-11-23 23:31:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-11-23 23:31:31,436 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 [2024-11-23 23:31:31,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:31:31,438 INFO L225 Difference]: With dead ends: 604 [2024-11-23 23:31:31,438 INFO L226 Difference]: Without dead ends: 603 [2024-11-23 23:31:31,440 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14334 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=5564, Invalid=37492, Unknown=0, NotChecked=0, Total=43056 [2024-11-23 23:31:31,441 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 1413 mSDsluCounter, 2501 mSDsCounter, 0 mSdLazyCounter, 3120 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 2602 SdHoareTripleChecker+Invalid, 3145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:31:31,441 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 2602 Invalid, 3145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3120 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-23 23:31:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2024-11-23 23:31:31,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 484. [2024-11-23 23:31:31,446 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) [2024-11-23 23:31:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 574 transitions. [2024-11-23 23:31:31,447 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 574 transitions. Word has length 290 [2024-11-23 23:31:31,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:31:31,447 INFO L471 AbstractCegarLoop]: Abstraction has 484 states and 574 transitions. [2024-11-23 23:31:31,447 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) [2024-11-23 23:31:31,447 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 574 transitions. [2024-11-23 23:31:31,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2024-11-23 23:31:31,449 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:31:31,449 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] [2024-11-23 23:31:31,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-11-23 23:31:31,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2024-11-23 23:31:31,649 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)] === [2024-11-23 23:31:31,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:31:31,650 INFO L85 PathProgramCache]: Analyzing trace with hash 291014443, now seen corresponding path program 25 times [2024-11-23 23:31:31,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:31:31,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221702794] [2024-11-23 23:31:31,650 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:31:31,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:31:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:31:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 180 proven. 1566 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2024-11-23 23:31:33,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:31:33,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221702794] [2024-11-23 23:31:33,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221702794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:31:33,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525748146] [2024-11-23 23:31:33,544 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:31:33,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:31:33,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:31:33,546 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:31:33,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-11-23 23:31:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:31:34,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 1443 conjuncts, 430 conjuncts are in the unsatisfiable core [2024-11-23 23:31:34,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:31:34,137 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 [2024-11-23 23:31:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 75 proven. 1674 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2024-11-23 23:31:38,035 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:31:38,374 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 [2024-11-23 23:31:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 75 proven. 1674 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2024-11-23 23:31:41,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525748146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:31:41,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:31:41,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 47, 47] total 110 [2024-11-23 23:31:41,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820796532] [2024-11-23 23:31:41,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:31:41,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-11-23 23:31:41,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:31:41,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-11-23 23:31:41,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=11729, Unknown=0, NotChecked=0, Total=11990 [2024-11-23 23:31:41,374 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) [2024-11-23 23:31:54,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:31:54,733 INFO L93 Difference]: Finished difference Result 857 states and 1027 transitions. [2024-11-23 23:31:54,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-11-23 23:31:54,733 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 [2024-11-23 23:31:54,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:31:54,734 INFO L225 Difference]: With dead ends: 857 [2024-11-23 23:31:54,734 INFO L226 Difference]: Without dead ends: 492 [2024-11-23 23:31:54,736 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3379 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=1969, Invalid=33563, Unknown=0, NotChecked=0, Total=35532 [2024-11-23 23:31:54,736 INFO L435 NwaCegarLoop]: 283 mSDtfsCounter, 3379 mSDsluCounter, 22080 mSDsCounter, 0 mSdLazyCounter, 14267 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3379 SdHoareTripleChecker+Valid, 22363 SdHoareTripleChecker+Invalid, 14268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:31:54,736 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3379 Valid, 22363 Invalid, 14268 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 14267 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2024-11-23 23:31:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2024-11-23 23:31:54,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 490. [2024-11-23 23:31:54,741 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) [2024-11-23 23:31:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 580 transitions. [2024-11-23 23:31:54,741 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 580 transitions. Word has length 301 [2024-11-23 23:31:54,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:31:54,742 INFO L471 AbstractCegarLoop]: Abstraction has 490 states and 580 transitions. [2024-11-23 23:31:54,742 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) [2024-11-23 23:31:54,742 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 580 transitions. [2024-11-23 23:31:54,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2024-11-23 23:31:54,743 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:31:54,744 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] [2024-11-23 23:31:54,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-11-23 23:31:54,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2024-11-23 23:31:54,944 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)] === [2024-11-23 23:31:54,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:31:54,944 INFO L85 PathProgramCache]: Analyzing trace with hash -845760628, now seen corresponding path program 26 times [2024-11-23 23:31:54,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:31:54,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469594096] [2024-11-23 23:31:54,945 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:31:54,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:31:55,053 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:31:55,053 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:31:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 532 proven. 1273 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2024-11-23 23:31:58,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:31:58,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469594096] [2024-11-23 23:31:58,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469594096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:31:58,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751534443] [2024-11-23 23:31:58,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:31:58,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:31:58,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:31:58,858 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:31:58,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-11-23 23:31:59,445 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:31:59,445 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:31:59,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 245 conjuncts are in the unsatisfiable core [2024-11-23 23:31:59,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:32:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 532 proven. 1273 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2024-11-23 23:32:01,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:32:04,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:32:04,163 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 [2024-11-23 23:32:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 532 proven. 1273 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2024-11-23 23:32:06,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751534443] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:32:06,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:32:06,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 45, 45] total 112 [2024-11-23 23:32:06,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154816926] [2024-11-23 23:32:06,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:32:06,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-11-23 23:32:06,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:32:06,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-11-23 23:32:06,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1536, Invalid=11120, Unknown=0, NotChecked=0, Total=12656 [2024-11-23 23:32:06,735 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) [2024-11-23 23:32:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:32:13,022 INFO L93 Difference]: Finished difference Result 578 states and 671 transitions. [2024-11-23 23:32:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-23 23:32:13,022 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 [2024-11-23 23:32:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:32:13,024 INFO L225 Difference]: With dead ends: 578 [2024-11-23 23:32:13,024 INFO L226 Difference]: Without dead ends: 578 [2024-11-23 23:32:13,025 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6058 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2322, Invalid=21240, Unknown=0, NotChecked=0, Total=23562 [2024-11-23 23:32:13,025 INFO L435 NwaCegarLoop]: 203 mSDtfsCounter, 1143 mSDsluCounter, 6344 mSDsCounter, 0 mSdLazyCounter, 6437 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 6547 SdHoareTripleChecker+Invalid, 6437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:32:13,025 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1143 Valid, 6547 Invalid, 6437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6437 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-23 23:32:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2024-11-23 23:32:13,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 497. [2024-11-23 23:32:13,030 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) [2024-11-23 23:32:13,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 590 transitions. [2024-11-23 23:32:13,030 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 590 transitions. Word has length 304 [2024-11-23 23:32:13,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:32:13,031 INFO L471 AbstractCegarLoop]: Abstraction has 497 states and 590 transitions. [2024-11-23 23:32:13,031 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) [2024-11-23 23:32:13,031 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 590 transitions. [2024-11-23 23:32:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2024-11-23 23:32:13,032 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:32:13,032 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] [2024-11-23 23:32:13,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2024-11-23 23:32:13,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2024-11-23 23:32:13,232 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)] === [2024-11-23 23:32:13,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:32:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1304172908, now seen corresponding path program 27 times [2024-11-23 23:32:13,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:32:13,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550230825] [2024-11-23 23:32:13,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:32:13,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:32:13,506 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-23 23:32:13,506 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:32:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 551 proven. 231 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2024-11-23 23:32:15,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:32:15,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550230825] [2024-11-23 23:32:15,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550230825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:32:15,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450692201] [2024-11-23 23:32:15,498 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:32:15,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:32:15,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:32:15,500 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:32:15,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-11-23 23:32:22,388 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-23 23:32:22,388 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:32:22,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-23 23:32:22,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:32:23,675 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 [2024-11-23 23:32:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 290 proven. 547 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2024-11-23 23:32:24,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:32:25,266 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 [2024-11-23 23:32:25,268 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 [2024-11-23 23:32:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 290 proven. 357 refuted. 0 times theorem prover too weak. 1715 trivial. 0 not checked. [2024-11-23 23:32:26,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450692201] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:32:26,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:32:26,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 42, 29] total 106 [2024-11-23 23:32:26,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981507113] [2024-11-23 23:32:26,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:32:26,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-11-23 23:32:26,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:32:26,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-11-23 23:32:26,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=10563, Unknown=0, NotChecked=0, Total=11130 [2024-11-23 23:32:26,201 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) [2024-11-23 23:32:32,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:32:32,811 INFO L93 Difference]: Finished difference Result 590 states and 684 transitions. [2024-11-23 23:32:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-23 23:32:32,811 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 [2024-11-23 23:32:32,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:32:32,813 INFO L225 Difference]: With dead ends: 590 [2024-11-23 23:32:32,813 INFO L226 Difference]: Without dead ends: 518 [2024-11-23 23:32:32,815 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7397 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1168, Invalid=23012, Unknown=0, NotChecked=0, Total=24180 [2024-11-23 23:32:32,816 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 146 mSDsluCounter, 4227 mSDsCounter, 0 mSdLazyCounter, 6349 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 4295 SdHoareTripleChecker+Invalid, 6360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 6349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:32:32,816 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 4295 Invalid, 6360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 6349 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-23 23:32:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2024-11-23 23:32:32,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 505. [2024-11-23 23:32:32,820 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) [2024-11-23 23:32:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 598 transitions. [2024-11-23 23:32:32,821 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 598 transitions. Word has length 311 [2024-11-23 23:32:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:32:32,821 INFO L471 AbstractCegarLoop]: Abstraction has 505 states and 598 transitions. [2024-11-23 23:32:32,821 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) [2024-11-23 23:32:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 598 transitions. [2024-11-23 23:32:32,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2024-11-23 23:32:32,823 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:32:32,823 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] [2024-11-23 23:32:32,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2024-11-23 23:32:33,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2024-11-23 23:32:33,024 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)] === [2024-11-23 23:32:33,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:32:33,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1379010349, now seen corresponding path program 28 times [2024-11-23 23:32:33,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:32:33,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157478453] [2024-11-23 23:32:33,025 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:32:33,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:32:33,157 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:32:33,157 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:32:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2407 backedges. 79 proven. 1862 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-23 23:32:37,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:32:37,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157478453] [2024-11-23 23:32:37,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157478453] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:32:37,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447089449] [2024-11-23 23:32:37,082 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:32:37,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:32:37,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:32:37,084 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:32:37,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-11-23 23:32:37,975 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:32:37,975 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:32:37,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 447 conjuncts are in the unsatisfiable core [2024-11-23 23:32:37,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:32:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2407 backedges. 79 proven. 1862 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-23 23:32:39,952 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:32:40,212 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 [2024-11-23 23:32:40,571 INFO L349 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2024-11-23 23:32:40,571 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 [2024-11-23 23:32:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2407 backedges. 79 proven. 1862 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-23 23:32:40,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447089449] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:32:40,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:32:40,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 75 [2024-11-23 23:32:40,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394410535] [2024-11-23 23:32:40,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:32:40,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-23 23:32:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:32:40,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-23 23:32:40,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=5373, Unknown=0, NotChecked=0, Total=5550 [2024-11-23 23:32:40,798 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) [2024-11-23 23:32:46,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:32:46,832 INFO L93 Difference]: Finished difference Result 812 states and 992 transitions. [2024-11-23 23:32:46,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-23 23:32:46,832 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 [2024-11-23 23:32:46,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:32:46,834 INFO L225 Difference]: With dead ends: 812 [2024-11-23 23:32:46,834 INFO L226 Difference]: Without dead ends: 513 [2024-11-23 23:32:46,835 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 605 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=321, Invalid=9981, Unknown=0, NotChecked=0, Total=10302 [2024-11-23 23:32:46,835 INFO L435 NwaCegarLoop]: 266 mSDtfsCounter, 366 mSDsluCounter, 14555 mSDsCounter, 0 mSdLazyCounter, 7902 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 14821 SdHoareTripleChecker+Invalid, 7902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:32:46,836 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 14821 Invalid, 7902 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7902 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-23 23:32:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2024-11-23 23:32:46,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 511. [2024-11-23 23:32:46,840 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) [2024-11-23 23:32:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 604 transitions. [2024-11-23 23:32:46,841 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 604 transitions. Word has length 315 [2024-11-23 23:32:46,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:32:46,841 INFO L471 AbstractCegarLoop]: Abstraction has 511 states and 604 transitions. [2024-11-23 23:32:46,842 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) [2024-11-23 23:32:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 604 transitions. [2024-11-23 23:32:46,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2024-11-23 23:32:46,843 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:32:46,843 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] [2024-11-23 23:32:46,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-11-23 23:32:47,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2024-11-23 23:32:47,044 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)] === [2024-11-23 23:32:47,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:32:47,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1619171270, now seen corresponding path program 29 times [2024-11-23 23:32:47,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:32:47,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739369330] [2024-11-23 23:32:47,044 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:32:47,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:32:47,277 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-11-23 23:32:47,277 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:32:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 60 proven. 1940 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-23 23:32:49,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:32:49,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739369330] [2024-11-23 23:32:49,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739369330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:32:49,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193672230] [2024-11-23 23:32:49,258 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:32:49,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:32:49,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:32:49,260 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:32:49,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-11-23 23:32:50,542 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-11-23 23:32:50,542 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:32:50,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 1520 conjuncts, 257 conjuncts are in the unsatisfiable core [2024-11-23 23:32:50,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:32:50,569 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 [2024-11-23 23:32:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 590 proven. 1410 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-23 23:32:55,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:33:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 610 proven. 1390 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-23 23:33:02,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193672230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:33:02,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:33:02,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 138 [2024-11-23 23:33:02,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595691545] [2024-11-23 23:33:02,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:33:02,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2024-11-23 23:33:02,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:33:02,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2024-11-23 23:33:02,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1246, Invalid=17660, Unknown=0, NotChecked=0, Total=18906 [2024-11-23 23:33:02,954 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) [2024-11-23 23:33:24,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:33:24,086 INFO L93 Difference]: Finished difference Result 1004 states and 1186 transitions. [2024-11-23 23:33:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2024-11-23 23:33:24,087 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 [2024-11-23 23:33:24,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:33:24,089 INFO L225 Difference]: With dead ends: 1004 [2024-11-23 23:33:24,089 INFO L226 Difference]: Without dead ends: 607 [2024-11-23 23:33:24,094 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16182 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=6984, Invalid=75098, Unknown=0, NotChecked=0, Total=82082 [2024-11-23 23:33:24,094 INFO L435 NwaCegarLoop]: 248 mSDtfsCounter, 3838 mSDsluCounter, 16395 mSDsCounter, 0 mSdLazyCounter, 18526 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3838 SdHoareTripleChecker+Valid, 16643 SdHoareTripleChecker+Invalid, 18527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:33:24,094 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3838 Valid, 16643 Invalid, 18527 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 18526 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2024-11-23 23:33:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2024-11-23 23:33:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 524. [2024-11-23 23:33:24,098 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) [2024-11-23 23:33:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 620 transitions. [2024-11-23 23:33:24,098 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 620 transitions. Word has length 318 [2024-11-23 23:33:24,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:33:24,098 INFO L471 AbstractCegarLoop]: Abstraction has 524 states and 620 transitions. [2024-11-23 23:33:24,099 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) [2024-11-23 23:33:24,099 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 620 transitions. [2024-11-23 23:33:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2024-11-23 23:33:24,099 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:33:24,100 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] [2024-11-23 23:33:24,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2024-11-23 23:33:24,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:33:24,300 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)] === [2024-11-23 23:33:24,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:33:24,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1714082011, now seen corresponding path program 30 times [2024-11-23 23:33:24,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:33:24,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862768313] [2024-11-23 23:33:24,301 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:33:24,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:33:24,600 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2024-11-23 23:33:24,600 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:33:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2671 backedges. 463 proven. 393 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2024-11-23 23:33:26,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:33:26,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862768313] [2024-11-23 23:33:26,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862768313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:33:26,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332550140] [2024-11-23 23:33:26,571 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:33:26,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:33:26,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:33:26,572 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:33:26,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c02c1975-b8c3-462b-a933-c4cad762d34f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-11-23 23:33:36,222 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2024-11-23 23:33:36,222 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:33:36,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 1573 conjuncts, 220 conjuncts are in the unsatisfiable core [2024-11-23 23:33:36,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:33:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2671 backedges. 651 proven. 1554 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-23 23:33:38,632 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:33:40,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:33:40,996 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