./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/nr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/nr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a5d4c3d8db636946363c81d25b5c2e381fc236cdcde6b4765d7ce6e059d8a21 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:30:34,800 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:30:34,890 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:30:34,900 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:30:34,900 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:30:34,942 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:30:34,942 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:30:34,942 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:30:34,943 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:30:34,943 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:30:34,944 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:30:34,944 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:30:34,945 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:30:34,945 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:30:34,946 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:30:34,946 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:30:34,946 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:30:34,946 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:30:34,947 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:30:34,947 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:30:34,947 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:30:34,947 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:30:34,947 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:30:34,947 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:30:34,947 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:30:34,947 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:30:34,948 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:30:34,948 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:30:34,948 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:30:34,948 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:30:34,948 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:30:34,949 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:30:34,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:30:34,949 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:30:34,949 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:30:34,949 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:30:34,949 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:30:34,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:30:34,949 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:30:34,950 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:30:34,950 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:30:34,950 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:30:34,950 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:30:34,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:30:34,950 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:30:34,950 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:30:34,951 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:30:34,951 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:30:34,951 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_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) 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 -> 2a5d4c3d8db636946363c81d25b5c2e381fc236cdcde6b4765d7ce6e059d8a21 [2024-11-28 04:30:35,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:30:35,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:30:35,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:30:35,281 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:30:35,282 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:30:35,283 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-tiling/nr2.c [2024-11-28 04:30:38,405 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/data/092bb4b2d/a82c79fb5c9645d5acc6e4d0531a7bb1/FLAG9064d3a9c [2024-11-28 04:30:38,746 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:30:38,747 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/sv-benchmarks/c/array-tiling/nr2.c [2024-11-28 04:30:38,760 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/data/092bb4b2d/a82c79fb5c9645d5acc6e4d0531a7bb1/FLAG9064d3a9c [2024-11-28 04:30:38,986 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/data/092bb4b2d/a82c79fb5c9645d5acc6e4d0531a7bb1 [2024-11-28 04:30:38,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:30:38,991 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:30:38,993 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:30:38,994 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:30:38,999 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:30:39,000 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:30:38" (1/1) ... [2024-11-28 04:30:39,003 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1619e313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39, skipping insertion in model container [2024-11-28 04:30:39,004 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:30:38" (1/1) ... [2024-11-28 04:30:39,023 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:30:39,206 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/sv-benchmarks/c/array-tiling/nr2.c[394,407] [2024-11-28 04:30:39,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:30:39,245 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:30:39,254 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/sv-benchmarks/c/array-tiling/nr2.c[394,407] [2024-11-28 04:30:39,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:30:39,281 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:30:39,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39 WrapperNode [2024-11-28 04:30:39,281 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:30:39,283 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:30:39,283 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:30:39,283 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:30:39,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39" (1/1) ... [2024-11-28 04:30:39,297 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39" (1/1) ... [2024-11-28 04:30:39,313 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2024-11-28 04:30:39,313 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:30:39,314 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:30:39,314 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:30:39,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:30:39,322 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39" (1/1) ... [2024-11-28 04:30:39,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39" (1/1) ... [2024-11-28 04:30:39,324 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39" (1/1) ... [2024-11-28 04:30:39,345 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 6, 4]. 50 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-11-28 04:30:39,345 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39" (1/1) ... [2024-11-28 04:30:39,346 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39" (1/1) ... [2024-11-28 04:30:39,351 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39" (1/1) ... [2024-11-28 04:30:39,352 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39" (1/1) ... [2024-11-28 04:30:39,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39" (1/1) ... [2024-11-28 04:30:39,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39" (1/1) ... [2024-11-28 04:30:39,357 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39" (1/1) ... [2024-11-28 04:30:39,359 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:30:39,360 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:30:39,360 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:30:39,360 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:30:39,361 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39" (1/1) ... [2024-11-28 04:30:39,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:30:39,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:39,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:30:39,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:30:39,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:30:39,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:30:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:30:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 04:30:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 04:30:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:30:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:30:39,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 04:30:39,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:30:39,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:30:39,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:30:39,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:30:39,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 04:30:39,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 04:30:39,518 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:30:39,520 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:30:39,696 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-28 04:30:39,696 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:30:39,706 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:30:39,706 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 04:30:39,707 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:30:39 BoogieIcfgContainer [2024-11-28 04:30:39,707 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:30:39,710 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:30:39,710 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:30:39,715 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:30:39,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:30:38" (1/3) ... [2024-11-28 04:30:39,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6bcce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:30:39, skipping insertion in model container [2024-11-28 04:30:39,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:39" (2/3) ... [2024-11-28 04:30:39,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6bcce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:30:39, skipping insertion in model container [2024-11-28 04:30:39,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:30:39" (3/3) ... [2024-11-28 04:30:39,718 INFO L128 eAbstractionObserver]: Analyzing ICFG nr2.c [2024-11-28 04:30:39,734 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:30:39,736 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG nr2.c that has 1 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 04:30:39,792 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:30:39,806 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=LoopHeads, 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;@1752da46, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:30:39,807 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:30:39,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:30:39,822 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:39,823 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:39,824 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:39,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:39,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1061430520, now seen corresponding path program 1 times [2024-11-28 04:30:39,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:39,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670778173] [2024-11-28 04:30:39,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:39,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:40,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:40,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670778173] [2024-11-28 04:30:40,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670778173] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:30:40,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:30:40,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:30:40,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81749607] [2024-11-28 04:30:40,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:30:40,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:30:40,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:40,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:30:40,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:30:40,078 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:40,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:40,097 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2024-11-28 04:30:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:30:40,099 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 04:30:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:40,112 INFO L225 Difference]: With dead ends: 47 [2024-11-28 04:30:40,112 INFO L226 Difference]: Without dead ends: 21 [2024-11-28 04:30:40,116 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:30:40,123 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:40,125 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:30:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-28 04:30:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-28 04:30:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-28 04:30:40,166 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2024-11-28 04:30:40,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:40,167 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-28 04:30:40,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:40,168 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-28 04:30:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:30:40,169 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:40,171 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:40,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:30:40,172 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:40,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:40,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1790628430, now seen corresponding path program 1 times [2024-11-28 04:30:40,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:40,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5802883] [2024-11-28 04:30:40,173 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:40,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:40,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:40,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5802883] [2024-11-28 04:30:40,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5802883] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:30:40,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:30:40,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:30:40,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69051560] [2024-11-28 04:30:40,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:30:40,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:30:40,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:40,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:30:40,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:30:40,524 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:40,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:40,593 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-11-28 04:30:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:30:40,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 04:30:40,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:40,594 INFO L225 Difference]: With dead ends: 25 [2024-11-28 04:30:40,594 INFO L226 Difference]: Without dead ends: 23 [2024-11-28 04:30:40,595 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:30:40,595 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:40,596 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:30:40,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-28 04:30:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-28 04:30:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-11-28 04:30:40,602 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2024-11-28 04:30:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:40,602 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-11-28 04:30:40,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-11-28 04:30:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:30:40,603 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:40,603 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:40,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:30:40,604 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:40,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:40,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1790688012, now seen corresponding path program 1 times [2024-11-28 04:30:40,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:40,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888200079] [2024-11-28 04:30:40,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:40,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:40,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:40,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888200079] [2024-11-28 04:30:40,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888200079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:30:40,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:30:40,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:30:40,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674653382] [2024-11-28 04:30:40,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:30:40,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:30:40,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:40,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:30:40,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:30:40,912 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:40,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:40,994 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2024-11-28 04:30:40,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:30:40,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 04:30:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:40,995 INFO L225 Difference]: With dead ends: 40 [2024-11-28 04:30:40,996 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 04:30:40,997 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:30:40,998 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:41,001 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 28 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:30:41,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 04:30:41,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2024-11-28 04:30:41,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-28 04:30:41,010 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2024-11-28 04:30:41,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:41,010 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-28 04:30:41,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:41,011 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-28 04:30:41,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 04:30:41,013 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:41,014 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:41,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:30:41,014 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:41,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:41,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2090503076, now seen corresponding path program 1 times [2024-11-28 04:30:41,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:41,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610226990] [2024-11-28 04:30:41,015 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:41,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:41,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:41,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610226990] [2024-11-28 04:30:41,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610226990] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:30:41,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:30:41,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:30:41,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929034896] [2024-11-28 04:30:41,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:30:41,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:30:41,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:41,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:30:41,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:30:41,093 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:41,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:41,126 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2024-11-28 04:30:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:30:41,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-28 04:30:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:41,128 INFO L225 Difference]: With dead ends: 44 [2024-11-28 04:30:41,129 INFO L226 Difference]: Without dead ends: 27 [2024-11-28 04:30:41,130 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:30:41,130 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:41,133 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:30:41,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-28 04:30:41,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2024-11-28 04:30:41,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:41,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-11-28 04:30:41,142 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2024-11-28 04:30:41,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:41,143 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-11-28 04:30:41,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:41,144 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-11-28 04:30:41,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-28 04:30:41,144 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:41,144 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:41,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 04:30:41,145 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:41,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1092724549, now seen corresponding path program 1 times [2024-11-28 04:30:41,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:41,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257790066] [2024-11-28 04:30:41,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:41,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:41,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:41,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257790066] [2024-11-28 04:30:41,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257790066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:30:41,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109566268] [2024-11-28 04:30:41,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:41,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:41,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:41,278 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:41,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:30:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:41,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:30:41,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:41,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:30:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:41,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109566268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:30:41,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:30:41,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-28 04:30:41,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004782235] [2024-11-28 04:30:41,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:30:41,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:30:41,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:41,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:30:41,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:30:41,460 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:41,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:41,506 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2024-11-28 04:30:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:30:41,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-28 04:30:41,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:41,507 INFO L225 Difference]: With dead ends: 46 [2024-11-28 04:30:41,507 INFO L226 Difference]: Without dead ends: 28 [2024-11-28 04:30:41,507 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:30:41,508 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:41,509 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 55 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:30:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-28 04:30:41,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-28 04:30:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-28 04:30:41,514 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 21 [2024-11-28 04:30:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:41,514 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-28 04:30:41,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-28 04:30:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 04:30:41,515 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:41,515 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:41,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 04:30:41,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:41,719 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:41,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:41,720 INFO L85 PathProgramCache]: Analyzing trace with hash -250994756, now seen corresponding path program 2 times [2024-11-28 04:30:41,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:41,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922085405] [2024-11-28 04:30:41,720 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:30:41,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:41,769 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:30:41,769 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:30:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:41,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:41,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922085405] [2024-11-28 04:30:41,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922085405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:30:41,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000513380] [2024-11-28 04:30:41,906 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:30:41,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:41,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:41,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:41,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:30:42,014 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:30:42,014 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:30:42,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:30:42,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:42,110 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:30:42,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000513380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:30:42,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:30:42,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-11-28 04:30:42,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409242539] [2024-11-28 04:30:42,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:30:42,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:30:42,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:42,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:30:42,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:30:42,112 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:42,150 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2024-11-28 04:30:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:30:42,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-28 04:30:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:42,151 INFO L225 Difference]: With dead ends: 49 [2024-11-28 04:30:42,151 INFO L226 Difference]: Without dead ends: 28 [2024-11-28 04:30:42,151 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:30:42,152 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:42,152 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:30:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-28 04:30:42,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-28 04:30:42,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-28 04:30:42,162 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 24 [2024-11-28 04:30:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:42,165 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-28 04:30:42,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:42,165 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-28 04:30:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 04:30:42,166 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:42,166 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:42,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:30:42,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:42,366 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:42,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:42,367 INFO L85 PathProgramCache]: Analyzing trace with hash 7170682, now seen corresponding path program 1 times [2024-11-28 04:30:42,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:42,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265450070] [2024-11-28 04:30:42,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:42,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:43,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:43,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265450070] [2024-11-28 04:30:43,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265450070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:30:43,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901605734] [2024-11-28 04:30:43,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:43,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:43,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:43,042 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:43,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:30:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:43,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 04:30:43,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:43,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:30:43,352 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-28 04:30:43,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2024-11-28 04:30:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:43,781 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:30:44,025 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 37 treesize of output 33 [2024-11-28 04:30:44,029 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 47 treesize of output 43 [2024-11-28 04:30:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:30:44,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901605734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:30:44,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:30:44,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 27 [2024-11-28 04:30:44,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770349993] [2024-11-28 04:30:44,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:30:44,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 04:30:44,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:44,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 04:30:44,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:30:44,214 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:45,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:45,967 INFO L93 Difference]: Finished difference Result 135 states and 159 transitions. [2024-11-28 04:30:45,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 04:30:45,967 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-28 04:30:45,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:45,972 INFO L225 Difference]: With dead ends: 135 [2024-11-28 04:30:45,972 INFO L226 Difference]: Without dead ends: 114 [2024-11-28 04:30:45,974 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=652, Invalid=2770, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 04:30:45,975 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 374 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:45,975 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 118 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:30:45,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-28 04:30:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 45. [2024-11-28 04:30:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2024-11-28 04:30:45,996 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 24 [2024-11-28 04:30:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:45,996 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2024-11-28 04:30:45,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2024-11-28 04:30:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 04:30:45,998 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:45,998 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] [2024-11-28 04:30:46,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:30:46,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:46,203 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:46,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:46,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1358900004, now seen corresponding path program 1 times [2024-11-28 04:30:46,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:46,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941585629] [2024-11-28 04:30:46,205 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:46,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:46,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:46,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941585629] [2024-11-28 04:30:46,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941585629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:30:46,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784525223] [2024-11-28 04:30:46,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:46,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:46,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:46,844 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:46,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:30:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:46,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 04:30:46,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:47,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:30:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:47,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:30:47,318 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 19 treesize of output 17 [2024-11-28 04:30:47,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-28 04:30:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:47,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784525223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:30:47,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:30:47,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2024-11-28 04:30:47,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413204280] [2024-11-28 04:30:47,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:30:47,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 04:30:47,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:47,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 04:30:47,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:30:47,487 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:48,047 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2024-11-28 04:30:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:30:48,048 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-28 04:30:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:48,049 INFO L225 Difference]: With dead ends: 87 [2024-11-28 04:30:48,049 INFO L226 Difference]: Without dead ends: 85 [2024-11-28 04:30:48,050 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=1382, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 04:30:48,050 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 93 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:48,051 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 162 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:30:48,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-28 04:30:48,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2024-11-28 04:30:48,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2024-11-28 04:30:48,067 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 30 [2024-11-28 04:30:48,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:48,067 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2024-11-28 04:30:48,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2024-11-28 04:30:48,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 04:30:48,068 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:48,068 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 04:30:48,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:30:48,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:48,270 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:48,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:48,270 INFO L85 PathProgramCache]: Analyzing trace with hash -31177650, now seen corresponding path program 2 times [2024-11-28 04:30:48,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:48,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554190947] [2024-11-28 04:30:48,271 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:30:48,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:48,294 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:30:48,294 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:30:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:30:48,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:48,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554190947] [2024-11-28 04:30:48,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554190947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:30:48,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004533351] [2024-11-28 04:30:48,624 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:30:48,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:48,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:48,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:48,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:30:48,696 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:30:48,696 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:30:48,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:30:48,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:30:49,131 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:30:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:30:49,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004533351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:30:49,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:30:49,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2024-11-28 04:30:49,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11233131] [2024-11-28 04:30:49,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:30:49,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:30:49,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:49,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:30:49,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:30:49,354 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:49,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:49,574 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2024-11-28 04:30:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:30:49,575 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 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 36 [2024-11-28 04:30:49,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:49,576 INFO L225 Difference]: With dead ends: 113 [2024-11-28 04:30:49,576 INFO L226 Difference]: Without dead ends: 89 [2024-11-28 04:30:49,577 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:30:49,577 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 184 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:49,578 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 83 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:30:49,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-28 04:30:49,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 58. [2024-11-28 04:30:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-11-28 04:30:49,590 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 36 [2024-11-28 04:30:49,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:49,590 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-11-28 04:30:49,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:49,590 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-11-28 04:30:49,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 04:30:49,591 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:49,591 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:49,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:30:49,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:49,792 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:49,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:49,792 INFO L85 PathProgramCache]: Analyzing trace with hash 745553554, now seen corresponding path program 3 times [2024-11-28 04:30:49,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:49,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232978889] [2024-11-28 04:30:49,792 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:30:49,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:49,823 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 04:30:49,823 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:30:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:30:50,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:50,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232978889] [2024-11-28 04:30:50,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232978889] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:30:50,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346293229] [2024-11-28 04:30:50,584 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:30:50,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:50,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:50,587 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:50,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:30:50,673 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 04:30:50,673 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:30:50,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 04:30:50,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:50,757 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 16 treesize of output 12 [2024-11-28 04:30:50,922 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-28 04:30:50,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2024-11-28 04:30:51,074 INFO L349 Elim1Store]: treesize reduction 83, result has 22.4 percent of original size [2024-11-28 04:30:51,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 30 [2024-11-28 04:30:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:51,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:37,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-28 04:31:37,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-28 04:31:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:37,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346293229] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:31:37,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:31:37,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 46 [2024-11-28 04:31:37,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509559888] [2024-11-28 04:31:37,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:31:37,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-28 04:31:37,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:37,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-28 04:31:37,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1793, Unknown=9, NotChecked=0, Total=2070 [2024-11-28 04:31:37,460 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 46 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:40,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:31:45,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:31:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:45,837 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2024-11-28 04:31:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 04:31:45,837 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-28 04:31:45,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:45,838 INFO L225 Difference]: With dead ends: 116 [2024-11-28 04:31:45,838 INFO L226 Difference]: Without dead ends: 114 [2024-11-28 04:31:45,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=700, Invalid=4261, Unknown=9, NotChecked=0, Total=4970 [2024-11-28 04:31:45,841 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 202 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 45 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:45,841 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 190 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 859 Invalid, 4 Unknown, 0 Unchecked, 7.4s Time] [2024-11-28 04:31:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-28 04:31:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 47. [2024-11-28 04:31:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2024-11-28 04:31:45,852 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 40 [2024-11-28 04:31:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:45,852 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2024-11-28 04:31:45,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2024-11-28 04:31:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 04:31:45,853 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:45,853 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:45,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 04:31:46,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:46,054 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:46,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:46,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1842836164, now seen corresponding path program 4 times [2024-11-28 04:31:46,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:46,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814499846] [2024-11-28 04:31:46,055 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:31:46,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:46,078 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:31:46,081 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:31:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:31:46,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:46,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814499846] [2024-11-28 04:31:46,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814499846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:46,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531769679] [2024-11-28 04:31:46,649 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:31:46,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:46,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:46,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:46,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:31:46,719 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:31:46,720 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:31:46,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 04:31:46,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:46,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 04:31:46,936 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-28 04:31:46,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2024-11-28 04:31:47,094 INFO L349 Elim1Store]: treesize reduction 83, result has 22.4 percent of original size [2024-11-28 04:31:47,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 30 [2024-11-28 04:31:47,480 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 04:31:47,480 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 33 treesize of output 10 [2024-11-28 04:31:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:31:47,514 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:51,275 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_41| Int)) (or (forall ((v_ArrVal_118 Int)) (< (select (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) (* |v_ULTIMATE.start_main_~j~0#1_41| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_118) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_41| 1)))) is different from false [2024-11-28 04:33:15,341 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 41 treesize of output 39 [2024-11-28 04:33:15,347 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 358 treesize of output 350 [2024-11-28 04:33:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 3 not checked. [2024-11-28 04:33:15,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531769679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:33:15,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:33:15,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 35 [2024-11-28 04:33:15,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802170925] [2024-11-28 04:33:15,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:33:15,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 04:33:15,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:33:15,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 04:33:15,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=986, Unknown=20, NotChecked=64, Total=1190 [2024-11-28 04:33:15,697 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 35 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:33:34,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:33:34,493 INFO L93 Difference]: Finished difference Result 169 states and 198 transitions. [2024-11-28 04:33:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 04:33:34,494 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 35 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 46 [2024-11-28 04:33:34,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:33:34,495 INFO L225 Difference]: With dead ends: 169 [2024-11-28 04:33:34,495 INFO L226 Difference]: Without dead ends: 134 [2024-11-28 04:33:34,496 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 105.8s TimeCoverageRelationStatistics Valid=490, Invalid=3650, Unknown=24, NotChecked=126, Total=4290 [2024-11-28 04:33:34,497 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 183 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:33:34,497 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 299 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 914 Invalid, 0 Unknown, 133 Unchecked, 1.1s Time] [2024-11-28 04:33:34,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-28 04:33:34,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 76. [2024-11-28 04:33:34,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:33:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2024-11-28 04:33:34,529 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 46 [2024-11-28 04:33:34,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:33:34,529 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2024-11-28 04:33:34,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 35 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:33:34,530 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2024-11-28 04:33:34,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 04:33:34,536 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:33:34,536 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:33:34,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:33:34,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:33:34,737 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:33:34,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:33:34,737 INFO L85 PathProgramCache]: Analyzing trace with hash -671780828, now seen corresponding path program 5 times [2024-11-28 04:33:34,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:33:34,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724912437] [2024-11-28 04:33:34,737 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:33:34,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:33:34,787 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 04:33:34,787 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:33:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:33:35,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:33:35,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724912437] [2024-11-28 04:33:35,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724912437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:33:35,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906935630] [2024-11-28 04:33:35,419 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:33:35,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:33:35,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:33:35,422 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:33:35,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:33:35,546 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 04:33:35,546 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:33:35,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 04:33:35,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:33:35,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:33:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:33:36,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:33:36,436 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 19 treesize of output 17 [2024-11-28 04:33:36,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-28 04:33:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:33:36,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906935630] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:33:36,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:33:36,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2024-11-28 04:33:36,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87195851] [2024-11-28 04:33:36,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:33:36,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:33:36,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:33:36,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:33:36,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:33:36,532 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 29 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 29 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:33:37,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:33:37,746 INFO L93 Difference]: Finished difference Result 173 states and 194 transitions. [2024-11-28 04:33:37,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:33:37,746 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 29 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-28 04:33:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:33:37,748 INFO L225 Difference]: With dead ends: 173 [2024-11-28 04:33:37,748 INFO L226 Difference]: Without dead ends: 171 [2024-11-28 04:33:37,749 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=359, Invalid=2191, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 04:33:37,750 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 166 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:33:37,750 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 294 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:33:37,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-28 04:33:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2024-11-28 04:33:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1555555555555554) internal successors, (156), 135 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:33:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2024-11-28 04:33:37,789 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 52 [2024-11-28 04:33:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:33:37,789 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2024-11-28 04:33:37,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 29 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:33:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2024-11-28 04:33:37,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 04:33:37,791 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:33:37,791 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:33:37,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:33:37,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:33:37,995 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:33:37,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:33:37,996 INFO L85 PathProgramCache]: Analyzing trace with hash 189139050, now seen corresponding path program 6 times [2024-11-28 04:33:37,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:33:37,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49813606] [2024-11-28 04:33:37,996 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:33:37,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:33:38,032 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-28 04:33:38,032 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:33:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-28 04:33:38,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:33:38,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49813606] [2024-11-28 04:33:38,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49813606] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:33:38,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:33:38,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:33:38,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561027076] [2024-11-28 04:33:38,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:33:38,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:33:38,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:33:38,119 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:33:38,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:33:38,120 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:33:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:33:38,163 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2024-11-28 04:33:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:33:38,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-11-28 04:33:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:33:38,165 INFO L225 Difference]: With dead ends: 152 [2024-11-28 04:33:38,165 INFO L226 Difference]: Without dead ends: 88 [2024-11-28 04:33:38,166 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:33:38,167 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:33:38,168 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:33:38,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-28 04:33:38,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2024-11-28 04:33:38,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 84 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:33:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2024-11-28 04:33:38,210 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 56 [2024-11-28 04:33:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:33:38,210 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2024-11-28 04:33:38,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:33:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2024-11-28 04:33:38,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 04:33:38,211 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:33:38,211 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:33:38,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 04:33:38,212 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:33:38,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:33:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash 43174222, now seen corresponding path program 7 times [2024-11-28 04:33:38,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:33:38,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250190441] [2024-11-28 04:33:38,213 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:33:38,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:33:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:33:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:33:38,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:33:38,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250190441] [2024-11-28 04:33:38,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250190441] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:33:38,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556022925] [2024-11-28 04:33:38,789 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:33:38,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:33:38,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:33:38,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:33:38,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:33:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:33:38,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:33:38,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:33:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:33:39,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:33:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:33:40,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556022925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:33:40,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:33:40,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2024-11-28 04:33:40,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657747936] [2024-11-28 04:33:40,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:33:40,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 04:33:40,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:33:40,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 04:33:40,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 04:33:40,267 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 34 states, 34 states have (on average 4.352941176470588) internal successors, (148), 34 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:33:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:33:40,574 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2024-11-28 04:33:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 04:33:40,574 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.352941176470588) internal successors, (148), 34 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-28 04:33:40,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:33:40,575 INFO L225 Difference]: With dead ends: 111 [2024-11-28 04:33:40,575 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 04:33:40,576 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=411, Invalid=1149, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 04:33:40,576 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 244 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:33:40,577 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 143 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:33:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 04:33:40,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2024-11-28 04:33:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:33:40,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-11-28 04:33:40,595 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 58 [2024-11-28 04:33:40,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:33:40,596 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-11-28 04:33:40,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.352941176470588) internal successors, (148), 34 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:33:40,596 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-11-28 04:33:40,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 04:33:40,597 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:33:40,598 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:33:40,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 04:33:40,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 04:33:40,802 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:33:40,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:33:40,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1470751470, now seen corresponding path program 8 times [2024-11-28 04:33:40,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:33:40,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951162606] [2024-11-28 04:33:40,803 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:33:40,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:33:40,829 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:33:40,829 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:33:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:33:41,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:33:41,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951162606] [2024-11-28 04:33:41,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951162606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:33:41,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032423584] [2024-11-28 04:33:41,785 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:33:41,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:33:41,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:33:41,788 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:33:41,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:33:41,889 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:33:41,889 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:33:41,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 04:33:41,895 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:33:42,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:33:42,182 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-28 04:33:42,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2024-11-28 04:33:42,313 INFO L349 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2024-11-28 04:33:42,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 48 [2024-11-28 04:34:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:34:06,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:34:10,879 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_63| Int)) (or (< 2 |v_ULTIMATE.start_main_~j~0#1_63|) (= (select (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) (* |v_ULTIMATE.start_main_~j~0#1_63| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) |v_ULTIMATE.start_main_~j~0#1_63|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) 0))) is different from false [2024-11-28 04:34:36,952 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 27 [2024-11-28 04:34:36,957 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 150 treesize of output 142 [2024-11-28 04:34:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 93 refuted. 6 times theorem prover too weak. 7 trivial. 5 not checked. [2024-11-28 04:34:37,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032423584] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:34:37,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:34:37,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 18] total 48 [2024-11-28 04:34:37,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495135707] [2024-11-28 04:34:37,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:34:37,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-28 04:34:37,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:34:37,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-28 04:34:37,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1937, Unknown=11, NotChecked=90, Total=2256 [2024-11-28 04:34:37,099 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:45,561 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] [2024-11-28 04:34:49,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:34:57,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:36:50,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:37:02,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:37:19,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:40:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:47,890 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2024-11-28 04:40:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 04:40:47,891 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-11-28 04:40:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:47,891 INFO L225 Difference]: With dead ends: 128 [2024-11-28 04:40:47,892 INFO L226 Difference]: Without dead ends: 87 [2024-11-28 04:40:47,893 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 403.2s TimeCoverageRelationStatistics Valid=598, Invalid=4855, Unknown=101, NotChecked=146, Total=5700 [2024-11-28 04:40:47,894 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 36 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 21.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:47,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 462 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1551 Invalid, 6 Unknown, 83 Unchecked, 21.5s Time] [2024-11-28 04:40:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-28 04:40:47,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2024-11-28 04:40:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:40:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2024-11-28 04:40:47,918 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 62 [2024-11-28 04:40:47,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:47,918 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2024-11-28 04:40:47,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:40:47,919 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2024-11-28 04:40:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-28 04:40:47,919 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:47,919 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:47,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 04:40:48,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 04:40:48,120 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:40:48,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:48,121 INFO L85 PathProgramCache]: Analyzing trace with hash -389182532, now seen corresponding path program 9 times [2024-11-28 04:40:48,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:40:48,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528728754] [2024-11-28 04:40:48,121 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:40:48,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:40:48,196 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 04:40:48,196 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:40:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 04:40:49,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:40:49,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528728754] [2024-11-28 04:40:49,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528728754] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:40:49,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322972323] [2024-11-28 04:40:49,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:40:49,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:49,470 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:49,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:40:49,626 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 04:40:49,626 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:40:49,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 04:40:49,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:49,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:40:50,053 INFO L349 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2024-11-28 04:40:50,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 13 [2024-11-28 04:40:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:40:50,576 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:01,981 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 31 treesize of output 29 [2024-11-28 04:41:01,987 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 174 treesize of output 166 [2024-11-28 04:41:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:41:02,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322972323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:41:02,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:41:02,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 42 [2024-11-28 04:41:02,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905032666] [2024-11-28 04:41:02,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:02,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-28 04:41:02,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:41:02,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-28 04:41:02,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1545, Unknown=3, NotChecked=0, Total=1722 [2024-11-28 04:41:02,167 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 42 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 42 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:07,864 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 [1] [2024-11-28 04:42:29,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:42:33,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:42:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:34,713 INFO L93 Difference]: Finished difference Result 154 states and 169 transitions. [2024-11-28 04:42:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 04:42:34,714 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 42 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2024-11-28 04:42:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:34,715 INFO L225 Difference]: With dead ends: 154 [2024-11-28 04:42:34,715 INFO L226 Difference]: Without dead ends: 144 [2024-11-28 04:42:34,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 91.5s TimeCoverageRelationStatistics Valid=827, Invalid=5800, Unknown=15, NotChecked=0, Total=6642 [2024-11-28 04:42:34,718 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 258 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 79 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:34,718 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 480 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1482 Invalid, 3 Unknown, 0 Unchecked, 13.2s Time] [2024-11-28 04:42:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-28 04:42:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 75. [2024-11-28 04:42:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2024-11-28 04:42:34,744 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 68 [2024-11-28 04:42:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:34,744 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2024-11-28 04:42:34,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 42 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:34,745 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2024-11-28 04:42:34,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 04:42:34,745 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:34,745 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:34,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:42:34,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 04:42:34,946 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:42:34,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:34,946 INFO L85 PathProgramCache]: Analyzing trace with hash -2055106908, now seen corresponding path program 10 times [2024-11-28 04:42:34,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:42:34,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140174321] [2024-11-28 04:42:34,947 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:42:34,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:42:34,985 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:42:34,985 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 152 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:42:35,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:42:35,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140174321] [2024-11-28 04:42:35,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140174321] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:35,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580630089] [2024-11-28 04:42:35,758 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:42:35,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:35,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:35,762 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:35,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:42:35,883 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:42:35,883 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:35,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 04:42:35,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:36,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:42:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:42:36,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:36,852 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 19 treesize of output 17 [2024-11-28 04:42:36,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-28 04:42:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:42:36,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580630089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:42:36,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:42:36,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 32 [2024-11-28 04:42:36,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13091668] [2024-11-28 04:42:36,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:36,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 04:42:36,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:42:36,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 04:42:36,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:42:36,949 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 32 states, 32 states have (on average 3.84375) internal successors, (123), 32 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:37,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:37,943 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2024-11-28 04:42:37,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 04:42:37,943 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.84375) internal successors, (123), 32 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 74 [2024-11-28 04:42:37,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:37,945 INFO L225 Difference]: With dead ends: 144 [2024-11-28 04:42:37,945 INFO L226 Difference]: Without dead ends: 142 [2024-11-28 04:42:37,945 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 04:42:37,946 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:37,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 387 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 04:42:37,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-28 04:42:37,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 119. [2024-11-28 04:42:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.076271186440678) internal successors, (127), 118 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2024-11-28 04:42:37,976 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 74 [2024-11-28 04:42:37,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:37,976 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2024-11-28 04:42:37,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.84375) internal successors, (123), 32 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:37,977 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2024-11-28 04:42:37,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 04:42:37,977 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:37,978 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:37,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 04:42:38,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 04:42:38,178 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:42:38,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:38,179 INFO L85 PathProgramCache]: Analyzing trace with hash -986839090, now seen corresponding path program 11 times [2024-11-28 04:42:38,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:42:38,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523098293] [2024-11-28 04:42:38,179 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:42:38,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:42:38,245 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 04:42:38,245 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 120 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:42:38,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:42:38,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523098293] [2024-11-28 04:42:38,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523098293] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:38,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456027403] [2024-11-28 04:42:38,924 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:42:38,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:38,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:38,927 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:38,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:42:39,156 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 04:42:39,156 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:39,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 04:42:39,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:39,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:42:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 43 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:42:39,991 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:40,348 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 19 treesize of output 17 [2024-11-28 04:42:40,353 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 28 treesize of output 24 [2024-11-28 04:42:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 43 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:42:40,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456027403] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:42:40,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:42:40,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2024-11-28 04:42:40,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667136485] [2024-11-28 04:42:40,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:40,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-28 04:42:40,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:42:40,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-28 04:42:40,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 04:42:40,748 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand has 47 states, 47 states have (on average 4.361702127659575) internal successors, (205), 47 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:42,625 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2024-11-28 04:42:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 04:42:42,625 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.361702127659575) internal successors, (205), 47 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2024-11-28 04:42:42,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:42,626 INFO L225 Difference]: With dead ends: 144 [2024-11-28 04:42:42,626 INFO L226 Difference]: Without dead ends: 96 [2024-11-28 04:42:42,628 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1603 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=667, Invalid=4883, Unknown=0, NotChecked=0, Total=5550 [2024-11-28 04:42:42,628 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 410 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:42,629 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 526 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:42:42,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-28 04:42:42,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2024-11-28 04:42:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 84 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2024-11-28 04:42:42,650 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 80 [2024-11-28 04:42:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:42,651 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2024-11-28 04:42:42,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.361702127659575) internal successors, (205), 47 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2024-11-28 04:42:42,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-28 04:42:42,652 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:42,652 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:42,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 04:42:42,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 04:42:42,852 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:42:42,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:42,853 INFO L85 PathProgramCache]: Analyzing trace with hash 452310290, now seen corresponding path program 12 times [2024-11-28 04:42:42,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:42:42,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433269750] [2024-11-28 04:42:42,853 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:42:42,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:42:42,904 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-28 04:42:42,905 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 1 proven. 217 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:42:44,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:42:44,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433269750] [2024-11-28 04:42:44,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433269750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:44,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557334859] [2024-11-28 04:42:44,002 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:42:44,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:44,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:44,004 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:44,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:42:44,232 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-28 04:42:44,232 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:44,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-28 04:42:44,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:44,535 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 11 treesize of output 7 [2024-11-28 04:42:44,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-28 04:42:44,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:42:44,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2024-11-28 04:42:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:42:45,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:46,151 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 34 treesize of output 32 [2024-11-28 04:42:46,155 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 33 treesize of output 29 [2024-11-28 04:42:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:42:46,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557334859] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:42:46,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:42:46,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 22] total 49 [2024-11-28 04:42:46,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426710803] [2024-11-28 04:42:46,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:46,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-28 04:42:46,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:42:46,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-28 04:42:46,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2068, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 04:42:46,321 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 49 states, 49 states have (on average 3.693877551020408) internal successors, (181), 49 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:49,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:49,066 INFO L93 Difference]: Finished difference Result 195 states and 213 transitions. [2024-11-28 04:42:49,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-28 04:42:49,067 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.693877551020408) internal successors, (181), 49 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 84 [2024-11-28 04:42:49,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:49,068 INFO L225 Difference]: With dead ends: 195 [2024-11-28 04:42:49,068 INFO L226 Difference]: Without dead ends: 193 [2024-11-28 04:42:49,071 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2585 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1018, Invalid=7538, Unknown=0, NotChecked=0, Total=8556 [2024-11-28 04:42:49,072 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 391 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:49,072 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 393 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 04:42:49,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-11-28 04:42:49,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 91. [2024-11-28 04:42:49,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0777777777777777) internal successors, (97), 90 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2024-11-28 04:42:49,102 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 84 [2024-11-28 04:42:49,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:49,102 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2024-11-28 04:42:49,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.693877551020408) internal successors, (181), 49 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:49,102 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2024-11-28 04:42:49,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-28 04:42:49,103 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:49,103 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:49,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 04:42:49,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:49,303 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:42:49,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:49,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1532699580, now seen corresponding path program 13 times [2024-11-28 04:42:49,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:42:49,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486106313] [2024-11-28 04:42:49,304 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:42:49,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:42:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 12 proven. 237 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:42:50,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:42:50,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486106313] [2024-11-28 04:42:50,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486106313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:50,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110263930] [2024-11-28 04:42:50,317 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:42:50,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:50,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:50,319 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:50,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_478c377c-cd02-4621-8184-c1d91b5a65ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:42:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:50,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 04:42:50,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:50,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:42:50,855 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-28 04:42:50,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2024-11-28 04:42:50,999 INFO L349 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2024-11-28 04:42:50,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 48 [2024-11-28 04:43:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 43 proven. 209 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:43:17,570 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:44:01,465 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 39 treesize of output 37 [2024-11-28 04:44:01,481 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 154 treesize of output 150 [2024-11-28 04:44:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 43 proven. 209 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:44:10,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110263930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:44:10,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:44:10,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 54 [2024-11-28 04:44:10,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116287756] [2024-11-28 04:44:10,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:44:10,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-28 04:44:10,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:44:10,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-28 04:44:10,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2555, Unknown=18, NotChecked=0, Total=2862 [2024-11-28 04:44:10,128 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 54 states, 54 states have (on average 4.407407407407407) internal successors, (238), 54 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:44:14,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:44:18,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:44:31,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:45:00,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:45:20,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:45:28,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]