./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC --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 a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 00:07:59,429 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 00:07:59,513 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-24 00:07:59,518 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 00:07:59,518 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 00:07:59,542 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 00:07:59,542 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 00:07:59,542 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 00:07:59,543 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 00:07:59,543 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 00:07:59,544 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 00:07:59,544 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 00:07:59,544 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 00:07:59,544 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 00:07:59,544 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 00:07:59,545 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 00:07:59,545 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 00:07:59,545 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 00:07:59,545 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 00:07:59,545 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 00:07:59,545 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 00:07:59,545 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 00:07:59,545 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 00:07:59,545 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 00:07:59,546 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 00:07:59,546 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 00:07:59,546 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 00:07:59,546 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 00:07:59,546 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 00:07:59,546 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:07:59,546 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:07:59,546 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:07:59,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:07:59,547 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 00:07:59,547 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:07:59,547 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:07:59,547 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:07:59,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:07:59,547 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 00:07:59,547 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 00:07:59,549 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 00:07:59,549 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 00:07:59,549 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 00:07:59,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 00:07:59,549 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 00:07:59,549 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 00:07:59,550 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 00:07:59,550 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 00:07:59,550 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_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! 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 -> a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d [2024-11-24 00:07:59,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 00:07:59,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 00:07:59,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 00:07:59,875 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 00:07:59,875 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 00:07:59,876 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2024-11-24 00:08:02,934 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/data/9cfa4d005/073c93bade8e43bc8008ba80c1468d23/FLAGc37606ab1 [2024-11-24 00:08:03,211 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 00:08:03,212 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2024-11-24 00:08:03,221 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/data/9cfa4d005/073c93bade8e43bc8008ba80c1468d23/FLAGc37606ab1 [2024-11-24 00:08:03,246 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/data/9cfa4d005/073c93bade8e43bc8008ba80c1468d23 [2024-11-24 00:08:03,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 00:08:03,251 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 00:08:03,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 00:08:03,254 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 00:08:03,259 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 00:08:03,260 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,260 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55fc6545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03, skipping insertion in model container [2024-11-24 00:08:03,261 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,275 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 00:08:03,430 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_074ebed1-d2b3-4b3a-8874-117ab9247feb/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2024-11-24 00:08:03,444 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:08:03,454 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 00:08:03,464 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_074ebed1-d2b3-4b3a-8874-117ab9247feb/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2024-11-24 00:08:03,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:08:03,482 INFO L204 MainTranslator]: Completed translation [2024-11-24 00:08:03,482 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03 WrapperNode [2024-11-24 00:08:03,483 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 00:08:03,484 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 00:08:03,484 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 00:08:03,484 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 00:08:03,492 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,516 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 35 [2024-11-24 00:08:03,516 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 00:08:03,517 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 00:08:03,518 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 00:08:03,518 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 00:08:03,526 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,527 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,538 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-24 00:08:03,538 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,538 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,541 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,541 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,544 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,545 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,546 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,547 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 00:08:03,547 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 00:08:03,548 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 00:08:03,548 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 00:08:03,549 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03" (1/1) ... [2024-11-24 00:08:03,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:08:03,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:03,583 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 00:08:03,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 00:08:03,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 00:08:03,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 00:08:03,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 00:08:03,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 00:08:03,674 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 00:08:03,675 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 00:08:03,787 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-24 00:08:03,787 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 00:08:03,796 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 00:08:03,796 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-24 00:08:03,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:08:03 BoogieIcfgContainer [2024-11-24 00:08:03,797 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 00:08:03,800 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 00:08:03,800 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 00:08:03,805 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 00:08:03,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:08:03" (1/3) ... [2024-11-24 00:08:03,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4571e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:08:03, skipping insertion in model container [2024-11-24 00:08:03,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:08:03" (2/3) ... [2024-11-24 00:08:03,806 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4571e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:08:03, skipping insertion in model container [2024-11-24 00:08:03,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:08:03" (3/3) ... [2024-11-24 00:08:03,807 INFO L128 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2024-11-24 00:08:03,822 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 00:08:03,823 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG mono-crafted_6.c that has 1 procedures, 14 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-24 00:08:03,875 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 00:08:03,890 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;@78c64014, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 00:08:03,891 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-24 00:08:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 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) [2024-11-24 00:08:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-24 00:08:03,901 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:03,902 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-24 00:08:03,902 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:08:03,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:03,909 INFO L85 PathProgramCache]: Analyzing trace with hash 889676535, now seen corresponding path program 1 times [2024-11-24 00:08:03,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:03,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012864231] [2024-11-24 00:08:03,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:08:03,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:08:04,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:04,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012864231] [2024-11-24 00:08:04,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012864231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:08:04,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:08:04,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:08:04,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802144720] [2024-11-24 00:08:04,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:08:04,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:08:04,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:04,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:08:04,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:08:04,125 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:04,179 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2024-11-24 00:08:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:08:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-24 00:08:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:04,189 INFO L225 Difference]: With dead ends: 28 [2024-11-24 00:08:04,189 INFO L226 Difference]: Without dead ends: 12 [2024-11-24 00:08:04,192 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:08:04,198 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:04,199 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:08:04,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-24 00:08:04,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-24 00:08:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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) [2024-11-24 00:08:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-11-24 00:08:04,230 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2024-11-24 00:08:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:04,230 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-11-24 00:08:04,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-11-24 00:08:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-24 00:08:04,233 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:04,233 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:04,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 00:08:04,234 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:08:04,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:04,235 INFO L85 PathProgramCache]: Analyzing trace with hash 209841213, now seen corresponding path program 1 times [2024-11-24 00:08:04,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:04,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332293142] [2024-11-24 00:08:04,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:08:04,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:08:04,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:04,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332293142] [2024-11-24 00:08:04,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332293142] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:04,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990764516] [2024-11-24 00:08:04,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:08:04,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:04,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:04,401 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:04,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 00:08:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:04,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-24 00:08:04,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:08:04,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:08:04,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990764516] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:04,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:04,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-24 00:08:04,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659380914] [2024-11-24 00:08:04,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:04,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:08:04,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:04,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:08:04,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:08:04,587 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:04,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:04,665 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2024-11-24 00:08:04,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:08:04,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-24 00:08:04,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:04,668 INFO L225 Difference]: With dead ends: 26 [2024-11-24 00:08:04,669 INFO L226 Difference]: Without dead ends: 18 [2024-11-24 00:08:04,670 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:08:04,671 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:04,671 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 27 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:08:04,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-24 00:08:04,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2024-11-24 00:08:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2024-11-24 00:08:04,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-11-24 00:08:04,677 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2024-11-24 00:08:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:04,678 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-11-24 00:08:04,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-11-24 00:08:04,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-24 00:08:04,678 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:04,678 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:04,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 00:08:04,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:04,884 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:08:04,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:04,885 INFO L85 PathProgramCache]: Analyzing trace with hash 159775021, now seen corresponding path program 1 times [2024-11-24 00:08:04,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:04,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438645086] [2024-11-24 00:08:04,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:08:04,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:08:05,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:05,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438645086] [2024-11-24 00:08:05,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438645086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:05,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776058829] [2024-11-24 00:08:05,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:08:05,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:05,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:05,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:05,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 00:08:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:05,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-24 00:08:05,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:08:05,205 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:08:05,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776058829] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:08:05,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 00:08:05,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-24 00:08:05,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302559446] [2024-11-24 00:08:05,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:08:05,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:08:05,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:05,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:08:05,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:08:05,208 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:05,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:05,239 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2024-11-24 00:08:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:08:05,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have 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 [2024-11-24 00:08:05,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:05,240 INFO L225 Difference]: With dead ends: 29 [2024-11-24 00:08:05,240 INFO L226 Difference]: Without dead ends: 19 [2024-11-24 00:08:05,240 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:08:05,241 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:05,242 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:08:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-24 00:08:05,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-24 00:08:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:05,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-11-24 00:08:05,251 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2024-11-24 00:08:05,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:05,253 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-11-24 00:08:05,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-11-24 00:08:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-24 00:08:05,254 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:05,254 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:05,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-24 00:08:05,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:05,455 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:08:05,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:05,455 INFO L85 PathProgramCache]: Analyzing trace with hash 832778009, now seen corresponding path program 1 times [2024-11-24 00:08:05,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:05,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529046003] [2024-11-24 00:08:05,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:08:05,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:08:05,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:05,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529046003] [2024-11-24 00:08:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529046003] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:05,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055442463] [2024-11-24 00:08:05,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:08:05,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:05,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:05,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:05,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 00:08:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:05,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 00:08:05,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:08:05,657 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:08:05,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055442463] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:05,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:05,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-24 00:08:05,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968051104] [2024-11-24 00:08:05,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:05,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 00:08:05,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:05,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 00:08:05,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-24 00:08:05,742 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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) [2024-11-24 00:08:05,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:05,804 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2024-11-24 00:08:05,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:08:05,805 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-24 00:08:05,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:05,806 INFO L225 Difference]: With dead ends: 40 [2024-11-24 00:08:05,806 INFO L226 Difference]: Without dead ends: 27 [2024-11-24 00:08:05,806 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-24 00:08:05,807 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:05,807 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:08:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-24 00:08:05,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-24 00:08:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-24 00:08:05,812 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2024-11-24 00:08:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:05,813 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-24 00:08:05,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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) [2024-11-24 00:08:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-24 00:08:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-24 00:08:05,813 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:05,814 INFO L218 NwaCegarLoop]: trace histogram [8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:05,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-24 00:08:06,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:06,018 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:08:06,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:06,019 INFO L85 PathProgramCache]: Analyzing trace with hash -505538767, now seen corresponding path program 2 times [2024-11-24 00:08:06,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:06,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731698126] [2024-11-24 00:08:06,019 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:08:06,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:06,040 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:08:06,041 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:08:06,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:06,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731698126] [2024-11-24 00:08:06,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731698126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:06,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836164745] [2024-11-24 00:08:06,287 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:08:06,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:06,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:06,289 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:06,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 00:08:06,335 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:08:06,335 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:06,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 00:08:06,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:08:06,390 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:08:06,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836164745] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:06,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:06,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-24 00:08:06,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359969550] [2024-11-24 00:08:06,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:06,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 00:08:06,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:06,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 00:08:06,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-24 00:08:06,584 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:06,688 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2024-11-24 00:08:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-24 00:08:06,689 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-24 00:08:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:06,690 INFO L225 Difference]: With dead ends: 56 [2024-11-24 00:08:06,690 INFO L226 Difference]: Without dead ends: 43 [2024-11-24 00:08:06,690 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-24 00:08:06,691 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:06,692 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:08:06,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-24 00:08:06,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-24 00:08:06,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2024-11-24 00:08:06,698 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2024-11-24 00:08:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:06,699 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2024-11-24 00:08:06,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2024-11-24 00:08:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-24 00:08:06,700 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:06,700 INFO L218 NwaCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:06,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 00:08:06,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:06,904 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:08:06,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:06,904 INFO L85 PathProgramCache]: Analyzing trace with hash 544415585, now seen corresponding path program 3 times [2024-11-24 00:08:06,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:06,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137207249] [2024-11-24 00:08:06,905 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:08:06,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:06,939 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-24 00:08:06,939 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-24 00:08:06,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:06,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137207249] [2024-11-24 00:08:06,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137207249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:06,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160635354] [2024-11-24 00:08:06,996 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:08:06,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:06,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:06,999 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:07,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 00:08:07,060 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-24 00:08:07,061 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:07,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-24 00:08:07,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-24 00:08:07,082 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-24 00:08:07,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160635354] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:07,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:07,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-24 00:08:07,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089439965] [2024-11-24 00:08:07,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:07,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:08:07,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:07,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:08:07,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:08:07,116 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:07,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:07,161 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2024-11-24 00:08:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:08:07,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-24 00:08:07,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:07,163 INFO L225 Difference]: With dead ends: 59 [2024-11-24 00:08:07,163 INFO L226 Difference]: Without dead ends: 55 [2024-11-24 00:08:07,163 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:08:07,164 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:07,164 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:08:07,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-24 00:08:07,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-24 00:08:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2024-11-24 00:08:07,172 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 42 [2024-11-24 00:08:07,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:07,175 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2024-11-24 00:08:07,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:07,176 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2024-11-24 00:08:07,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-24 00:08:07,177 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:07,177 INFO L218 NwaCegarLoop]: trace histogram [19, 14, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:07,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 00:08:07,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-24 00:08:07,377 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:08:07,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:07,378 INFO L85 PathProgramCache]: Analyzing trace with hash -960640289, now seen corresponding path program 4 times [2024-11-24 00:08:07,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:07,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68955633] [2024-11-24 00:08:07,378 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:08:07,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:07,429 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:08:07,429 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 135 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-24 00:08:08,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:08,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68955633] [2024-11-24 00:08:08,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68955633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:08,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674211004] [2024-11-24 00:08:08,054 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:08:08,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:08,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:08,058 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:08,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 00:08:08,141 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:08:08,141 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:08,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-24 00:08:08,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 135 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-24 00:08:08,248 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 135 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-24 00:08:08,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674211004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:08,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:08,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-11-24 00:08:08,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882325503] [2024-11-24 00:08:08,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:08,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-24 00:08:08,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:08,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-24 00:08:08,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-11-24 00:08:08,850 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:08,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:08,997 INFO L93 Difference]: Finished difference Result 112 states and 146 transitions. [2024-11-24 00:08:08,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-24 00:08:08,997 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-11-24 00:08:08,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:08,998 INFO L225 Difference]: With dead ends: 112 [2024-11-24 00:08:08,999 INFO L226 Difference]: Without dead ends: 87 [2024-11-24 00:08:08,999 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-11-24 00:08:09,000 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:09,000 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:08:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-24 00:08:09,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-24 00:08:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 86 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2024-11-24 00:08:09,022 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 54 [2024-11-24 00:08:09,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:09,022 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2024-11-24 00:08:09,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:09,024 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2024-11-24 00:08:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-24 00:08:09,026 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:09,026 INFO L218 NwaCegarLoop]: trace histogram [35, 30, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:09,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-24 00:08:09,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:09,226 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:08:09,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1187042497, now seen corresponding path program 5 times [2024-11-24 00:08:09,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:09,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545846838] [2024-11-24 00:08:09,227 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:08:09,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:09,299 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2024-11-24 00:08:09,299 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 354 proven. 3 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked. [2024-11-24 00:08:09,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:09,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545846838] [2024-11-24 00:08:09,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545846838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:09,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105225216] [2024-11-24 00:08:09,384 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:08:09,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:09,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:09,386 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:09,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 00:08:09,483 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2024-11-24 00:08:09,483 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:09,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-24 00:08:09,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 738 proven. 183 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-24 00:08:09,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 738 proven. 183 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-24 00:08:10,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105225216] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:10,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:10,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 16, 16] total 30 [2024-11-24 00:08:10,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097966545] [2024-11-24 00:08:10,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:10,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-24 00:08:10,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:10,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-24 00:08:10,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2024-11-24 00:08:10,241 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:10,521 INFO L93 Difference]: Finished difference Result 220 states and 292 transitions. [2024-11-24 00:08:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-24 00:08:10,522 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2024-11-24 00:08:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:10,524 INFO L225 Difference]: With dead ends: 220 [2024-11-24 00:08:10,524 INFO L226 Difference]: Without dead ends: 195 [2024-11-24 00:08:10,525 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2024-11-24 00:08:10,529 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:10,529 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 57 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:08:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-24 00:08:10,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2024-11-24 00:08:10,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.190721649484536) internal successors, (231), 194 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 231 transitions. [2024-11-24 00:08:10,564 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 231 transitions. Word has length 86 [2024-11-24 00:08:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:10,565 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 231 transitions. [2024-11-24 00:08:10,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 231 transitions. [2024-11-24 00:08:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2024-11-24 00:08:10,570 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:10,571 INFO L218 NwaCegarLoop]: trace histogram [62, 32, 32, 30, 28, 4, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:10,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-24 00:08:10,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:10,775 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:08:10,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:10,776 INFO L85 PathProgramCache]: Analyzing trace with hash 150048035, now seen corresponding path program 6 times [2024-11-24 00:08:10,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:10,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350262443] [2024-11-24 00:08:10,777 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:08:10,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:10,835 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-24 00:08:10,836 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4836 backedges. 769 proven. 32 refuted. 0 times theorem prover too weak. 4035 trivial. 0 not checked. [2024-11-24 00:08:10,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:10,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350262443] [2024-11-24 00:08:10,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350262443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:10,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263064284] [2024-11-24 00:08:10,966 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:08:10,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:10,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:10,969 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:10,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 00:08:11,082 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-24 00:08:11,082 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:11,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-24 00:08:11,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4836 backedges. 769 proven. 32 refuted. 0 times theorem prover too weak. 4035 trivial. 0 not checked. [2024-11-24 00:08:11,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4836 backedges. 769 proven. 32 refuted. 0 times theorem prover too weak. 4035 trivial. 0 not checked. [2024-11-24 00:08:11,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263064284] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:11,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:11,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-24 00:08:11,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042676400] [2024-11-24 00:08:11,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:11,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 00:08:11,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:11,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 00:08:11,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-11-24 00:08:11,259 INFO L87 Difference]: Start difference. First operand 195 states and 231 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:11,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:11,356 INFO L93 Difference]: Finished difference Result 223 states and 276 transitions. [2024-11-24 00:08:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 00:08:11,357 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2024-11-24 00:08:11,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:11,360 INFO L225 Difference]: With dead ends: 223 [2024-11-24 00:08:11,362 INFO L226 Difference]: Without dead ends: 219 [2024-11-24 00:08:11,363 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-11-24 00:08:11,363 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:11,364 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 23 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:08:11,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-24 00:08:11,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2024-11-24 00:08:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.224770642201835) internal successors, (267), 218 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 267 transitions. [2024-11-24 00:08:11,393 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 267 transitions. Word has length 194 [2024-11-24 00:08:11,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:11,394 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 267 transitions. [2024-11-24 00:08:11,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:11,394 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 267 transitions. [2024-11-24 00:08:11,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2024-11-24 00:08:11,402 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:11,403 INFO L218 NwaCegarLoop]: trace histogram [68, 38, 38, 30, 28, 10, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:11,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-24 00:08:11,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:11,604 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:08:11,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:11,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1010896609, now seen corresponding path program 7 times [2024-11-24 00:08:11,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:11,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91616163] [2024-11-24 00:08:11,605 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:08:11,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 2325 proven. 930 refuted. 0 times theorem prover too weak. 2775 trivial. 0 not checked. [2024-11-24 00:08:14,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:14,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91616163] [2024-11-24 00:08:14,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91616163] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:14,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886070368] [2024-11-24 00:08:14,077 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:08:14,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:14,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:14,080 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:14,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 00:08:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:14,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-24 00:08:14,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 2325 proven. 930 refuted. 0 times theorem prover too weak. 2775 trivial. 0 not checked. [2024-11-24 00:08:14,434 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 2325 proven. 930 refuted. 0 times theorem prover too weak. 2775 trivial. 0 not checked. [2024-11-24 00:08:16,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886070368] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:16,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:16,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2024-11-24 00:08:16,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202727641] [2024-11-24 00:08:16,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:16,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-24 00:08:16,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:16,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-24 00:08:16,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-11-24 00:08:16,595 INFO L87 Difference]: Start difference. First operand 219 states and 267 transitions. Second operand has 65 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 65 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:16,911 INFO L93 Difference]: Finished difference Result 440 states and 568 transitions. [2024-11-24 00:08:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-24 00:08:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 65 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2024-11-24 00:08:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:16,914 INFO L225 Difference]: With dead ends: 440 [2024-11-24 00:08:16,914 INFO L226 Difference]: Without dead ends: 283 [2024-11-24 00:08:16,917 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-11-24 00:08:16,918 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:16,919 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:08:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-11-24 00:08:16,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2024-11-24 00:08:16,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.173758865248227) internal successors, (331), 282 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 331 transitions. [2024-11-24 00:08:16,938 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 331 transitions. Word has length 218 [2024-11-24 00:08:16,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:16,939 INFO L471 AbstractCegarLoop]: Abstraction has 283 states and 331 transitions. [2024-11-24 00:08:16,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 65 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 331 transitions. [2024-11-24 00:08:16,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2024-11-24 00:08:16,944 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:16,944 INFO L218 NwaCegarLoop]: trace histogram [100, 62, 38, 38, 28, 10, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:16,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-24 00:08:17,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:17,148 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:08:17,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:17,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1603981791, now seen corresponding path program 8 times [2024-11-24 00:08:17,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:17,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54218414] [2024-11-24 00:08:17,149 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:08:17,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:17,326 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:08:17,326 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11406 backedges. 4725 proven. 3906 refuted. 0 times theorem prover too weak. 2775 trivial. 0 not checked. [2024-11-24 00:08:23,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:23,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54218414] [2024-11-24 00:08:23,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54218414] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:23,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201630523] [2024-11-24 00:08:23,613 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:08:23,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:23,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:23,615 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:23,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 00:08:23,810 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:08:23,810 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:23,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-24 00:08:23,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11406 backedges. 4725 proven. 3906 refuted. 0 times theorem prover too weak. 2775 trivial. 0 not checked. [2024-11-24 00:08:24,121 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11406 backedges. 4725 proven. 3906 refuted. 0 times theorem prover too weak. 2775 trivial. 0 not checked. [2024-11-24 00:08:29,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201630523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:29,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:29,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2024-11-24 00:08:29,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836436954] [2024-11-24 00:08:29,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:29,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-11-24 00:08:29,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:29,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-11-24 00:08:29,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2024-11-24 00:08:29,862 INFO L87 Difference]: Start difference. First operand 283 states and 331 transitions. Second operand has 129 states, 129 states have (on average 2.0697674418604652) internal successors, (267), 129 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:30,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:30,419 INFO L93 Difference]: Finished difference Result 568 states and 728 transitions. [2024-11-24 00:08:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2024-11-24 00:08:30,420 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0697674418604652) internal successors, (267), 129 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 282 [2024-11-24 00:08:30,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:30,422 INFO L225 Difference]: With dead ends: 568 [2024-11-24 00:08:30,422 INFO L226 Difference]: Without dead ends: 411 [2024-11-24 00:08:30,425 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2024-11-24 00:08:30,426 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:30,426 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-24 00:08:30,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2024-11-24 00:08:30,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2024-11-24 00:08:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.1195121951219513) internal successors, (459), 410 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 459 transitions. [2024-11-24 00:08:30,448 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 459 transitions. Word has length 282 [2024-11-24 00:08:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:30,448 INFO L471 AbstractCegarLoop]: Abstraction has 411 states and 459 transitions. [2024-11-24 00:08:30,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0697674418604652) internal successors, (267), 129 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 459 transitions. [2024-11-24 00:08:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2024-11-24 00:08:30,455 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:30,456 INFO L218 NwaCegarLoop]: trace histogram [164, 126, 38, 38, 28, 10, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:30,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 00:08:30,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:30,660 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:08:30,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:30,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1226871647, now seen corresponding path program 9 times [2024-11-24 00:08:30,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:30,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064253983] [2024-11-24 00:08:30,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:08:30,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:30,716 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-11-24 00:08:30,716 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 28302 backedges. 3811 proven. 200 refuted. 0 times theorem prover too weak. 24291 trivial. 0 not checked. [2024-11-24 00:08:30,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:30,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064253983] [2024-11-24 00:08:30,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064253983] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:30,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62449843] [2024-11-24 00:08:30,872 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:08:30,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:30,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:30,875 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:30,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 00:08:31,024 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-11-24 00:08:31,024 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:31,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-24 00:08:31,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 28302 backedges. 3811 proven. 200 refuted. 0 times theorem prover too weak. 24291 trivial. 0 not checked. [2024-11-24 00:08:31,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 28302 backedges. 3811 proven. 200 refuted. 0 times theorem prover too weak. 24291 trivial. 0 not checked. [2024-11-24 00:08:31,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62449843] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:31,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:31,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-11-24 00:08:31,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655480426] [2024-11-24 00:08:31,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:31,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-24 00:08:31,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:31,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-24 00:08:31,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2024-11-24 00:08:31,407 INFO L87 Difference]: Start difference. First operand 411 states and 459 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:31,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:31,621 INFO L93 Difference]: Finished difference Result 463 states and 546 transitions. [2024-11-24 00:08:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-24 00:08:31,622 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 410 [2024-11-24 00:08:31,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:31,629 INFO L225 Difference]: With dead ends: 463 [2024-11-24 00:08:31,629 INFO L226 Difference]: Without dead ends: 459 [2024-11-24 00:08:31,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 809 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2024-11-24 00:08:31,631 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:31,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 38 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:08:31,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2024-11-24 00:08:31,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2024-11-24 00:08:31,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.1593886462882097) internal successors, (531), 458 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 531 transitions. [2024-11-24 00:08:31,665 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 531 transitions. Word has length 410 [2024-11-24 00:08:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:31,666 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 531 transitions. [2024-11-24 00:08:31,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:31,668 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 531 transitions. [2024-11-24 00:08:31,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2024-11-24 00:08:31,678 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:31,678 INFO L218 NwaCegarLoop]: trace histogram [176, 126, 50, 50, 28, 22, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:31,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-24 00:08:31,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-24 00:08:31,880 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:08:31,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:31,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1729478825, now seen corresponding path program 10 times [2024-11-24 00:08:31,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:31,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774091827] [2024-11-24 00:08:31,883 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:08:31,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:32,159 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:08:32,160 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 33426 backedges. 12573 proven. 16002 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-11-24 00:08:49,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:49,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774091827] [2024-11-24 00:08:49,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774091827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:49,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911936286] [2024-11-24 00:08:49,064 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:08:49,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:49,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:49,067 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:49,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 00:08:49,350 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:08:49,350 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:49,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 254 conjuncts are in the unsatisfiable core [2024-11-24 00:08:49,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 33426 backedges. 12573 proven. 16002 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-11-24 00:08:49,886 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:09:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 33426 backedges. 12573 proven. 16002 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-11-24 00:09:10,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911936286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:09:10,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:09:10,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 257 [2024-11-24 00:09:10,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558262665] [2024-11-24 00:09:10,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:09:10,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2024-11-24 00:09:10,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:09:10,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2024-11-24 00:09:10,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2024-11-24 00:09:10,974 INFO L87 Difference]: Start difference. First operand 459 states and 531 transitions. Second operand has 257 states, 257 states have (on average 2.035019455252918) internal successors, (523), 257 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:09:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:09:13,113 INFO L93 Difference]: Finished difference Result 920 states and 1192 transitions. [2024-11-24 00:09:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2024-11-24 00:09:13,114 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 2.035019455252918) internal successors, (523), 257 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2024-11-24 00:09:13,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:09:13,118 INFO L225 Difference]: With dead ends: 920 [2024-11-24 00:09:13,118 INFO L226 Difference]: Without dead ends: 715 [2024-11-24 00:09:13,125 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1043 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2024-11-24 00:09:13,126 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-24 00:09:13,126 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-24 00:09:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2024-11-24 00:09:13,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 715. [2024-11-24 00:09:13,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.1022408963585435) internal successors, (787), 714 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:09:13,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 787 transitions. [2024-11-24 00:09:13,163 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 787 transitions. Word has length 458 [2024-11-24 00:09:13,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:09:13,164 INFO L471 AbstractCegarLoop]: Abstraction has 715 states and 787 transitions. [2024-11-24 00:09:13,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 2.035019455252918) internal successors, (523), 257 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:09:13,165 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 787 transitions. [2024-11-24 00:09:13,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2024-11-24 00:09:13,182 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:09:13,182 INFO L218 NwaCegarLoop]: trace histogram [304, 254, 50, 50, 28, 22, 1, 1, 1, 1, 1, 1] [2024-11-24 00:09:13,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-24 00:09:13,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-24 00:09:13,383 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:09:13,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:09:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash 721142359, now seen corresponding path program 11 times [2024-11-24 00:09:13,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:09:13,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309895606] [2024-11-24 00:09:13,384 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:09:13,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:09:14,383 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 262 check-sat command(s) [2024-11-24 00:09:14,383 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 94866 backedges. 28126 proven. 1596 refuted. 0 times theorem prover too weak. 65144 trivial. 0 not checked. [2024-11-24 00:09:16,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:09:16,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309895606] [2024-11-24 00:09:16,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309895606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:09:16,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657299709] [2024-11-24 00:09:16,047 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:09:16,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:16,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:09:16,049 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:09:16,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 00:09:17,917 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 262 check-sat command(s) [2024-11-24 00:09:17,917 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:17,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 236 conjuncts are in the unsatisfiable core [2024-11-24 00:09:17,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 94866 backedges. 53218 proven. 17814 refuted. 0 times theorem prover too weak. 23834 trivial. 0 not checked. [2024-11-24 00:09:25,485 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:09:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 94866 backedges. 53218 proven. 17814 refuted. 0 times theorem prover too weak. 23834 trivial. 0 not checked. [2024-11-24 00:09:47,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657299709] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:09:47,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:09:47,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 133, 133] total 264 [2024-11-24 00:09:47,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431974718] [2024-11-24 00:09:47,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:09:47,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 264 states [2024-11-24 00:09:47,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:09:47,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 264 interpolants. [2024-11-24 00:09:47,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34716, Invalid=34716, Unknown=0, NotChecked=0, Total=69432 [2024-11-24 00:09:47,840 INFO L87 Difference]: Start difference. First operand 715 states and 787 transitions. Second operand has 264 states, 264 states have (on average 2.7954545454545454) internal successors, (738), 264 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:11:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:11:13,264 INFO L93 Difference]: Finished difference Result 1856 states and 2468 transitions. [2024-11-24 00:11:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2024-11-24 00:11:13,266 INFO L78 Accepts]: Start accepts. Automaton has has 264 states, 264 states have (on average 2.7954545454545454) internal successors, (738), 264 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 714 [2024-11-24 00:11:13,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:11:13,274 INFO L225 Difference]: With dead ends: 1856 [2024-11-24 00:11:13,275 INFO L226 Difference]: Without dead ends: 1651 [2024-11-24 00:11:13,278 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1457 GetRequests, 1195 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=34716, Invalid=34716, Unknown=0, NotChecked=0, Total=69432 [2024-11-24 00:11:13,279 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 1460 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:11:13,280 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1460 Valid, 282 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-24 00:11:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2024-11-24 00:11:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1651. [2024-11-24 00:11:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 1.186060606060606) internal successors, (1957), 1650 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:11:13,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 1957 transitions. [2024-11-24 00:11:13,349 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 1957 transitions. Word has length 714 [2024-11-24 00:11:13,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:11:13,350 INFO L471 AbstractCegarLoop]: Abstraction has 1651 states and 1957 transitions. [2024-11-24 00:11:13,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 264 states, 264 states have (on average 2.7954545454545454) internal successors, (738), 264 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:11:13,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 1957 transitions. [2024-11-24 00:11:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1651 [2024-11-24 00:11:13,375 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:11:13,375 INFO L218 NwaCegarLoop]: trace histogram [538, 284, 284, 262, 254, 22, 1, 1, 1, 1, 1, 1] [2024-11-24 00:11:13,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-24 00:11:13,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-24 00:11:13,576 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:11:13,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:11:13,577 INFO L85 PathProgramCache]: Analyzing trace with hash 178596367, now seen corresponding path program 12 times [2024-11-24 00:11:13,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:11:13,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873696996] [2024-11-24 00:11:13,577 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:11:13,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:11:13,731 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2024-11-24 00:11:13,731 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:11:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 369816 backedges. 34987 proven. 968 refuted. 0 times theorem prover too weak. 333861 trivial. 0 not checked. [2024-11-24 00:11:14,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:11:14,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873696996] [2024-11-24 00:11:14,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873696996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:11:14,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038692986] [2024-11-24 00:11:14,580 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:11:14,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:11:14,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:11:14,584 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:11:14,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-24 00:11:15,169 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2024-11-24 00:11:15,169 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:11:15,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-24 00:11:15,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:11:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 369816 backedges. 34987 proven. 968 refuted. 0 times theorem prover too weak. 333861 trivial. 0 not checked. [2024-11-24 00:11:15,407 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:11:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 369816 backedges. 34987 proven. 968 refuted. 0 times theorem prover too weak. 333861 trivial. 0 not checked. [2024-11-24 00:11:16,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038692986] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:11:16,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:11:16,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-11-24 00:11:16,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377770909] [2024-11-24 00:11:16,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:11:16,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-24 00:11:16,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:11:16,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-24 00:11:16,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-11-24 00:11:16,319 INFO L87 Difference]: Start difference. First operand 1651 states and 1957 transitions. Second operand has 48 states, 48 states have (on average 4.0) internal successors, (192), 48 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:11:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:11:16,973 INFO L93 Difference]: Finished difference Result 1751 states and 2128 transitions. [2024-11-24 00:11:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-24 00:11:16,974 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.0) internal successors, (192), 48 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1650 [2024-11-24 00:11:16,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:11:16,981 INFO L225 Difference]: With dead ends: 1751 [2024-11-24 00:11:16,982 INFO L226 Difference]: Without dead ends: 1747 [2024-11-24 00:11:16,983 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3323 GetRequests, 3277 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-11-24 00:11:16,983 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:11:16,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 65 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-24 00:11:16,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2024-11-24 00:11:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1747. [2024-11-24 00:11:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 1.2033218785796105) internal successors, (2101), 1746 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:11:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 2101 transitions. [2024-11-24 00:11:17,050 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 2101 transitions. Word has length 1650 [2024-11-24 00:11:17,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:11:17,053 INFO L471 AbstractCegarLoop]: Abstraction has 1747 states and 2101 transitions. [2024-11-24 00:11:17,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.0) internal successors, (192), 48 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:11:17,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 2101 transitions. [2024-11-24 00:11:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1747 [2024-11-24 00:11:17,080 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:11:17,081 INFO L218 NwaCegarLoop]: trace histogram [562, 308, 308, 262, 254, 46, 1, 1, 1, 1, 1, 1] [2024-11-24 00:11:17,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-24 00:11:17,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-24 00:11:17,285 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:11:17,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:11:17,287 INFO L85 PathProgramCache]: Analyzing trace with hash 30372351, now seen corresponding path program 13 times [2024-11-24 00:11:17,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:11:17,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302388194] [2024-11-24 00:11:17,287 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:11:17,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:11:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:13:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 410400 backedges. 156825 proven. 64770 refuted. 0 times theorem prover too weak. 188805 trivial. 0 not checked. [2024-11-24 00:13:59,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:13:59,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302388194] [2024-11-24 00:13:59,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302388194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:13:59,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39819341] [2024-11-24 00:13:59,300 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:13:59,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:13:59,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:13:59,302 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:13:59,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-24 00:14:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:14:00,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 3715 conjuncts, 510 conjuncts are in the unsatisfiable core [2024-11-24 00:14:00,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:14:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 410400 backedges. 156825 proven. 64770 refuted. 0 times theorem prover too weak. 188805 trivial. 0 not checked. [2024-11-24 00:14:01,084 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:15:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 410400 backedges. 156825 proven. 64770 refuted. 0 times theorem prover too weak. 188805 trivial. 0 not checked. [2024-11-24 00:15:26,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39819341] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:15:26,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:15:26,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [257, 257, 257] total 513 [2024-11-24 00:15:26,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072833642] [2024-11-24 00:15:26,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:15:26,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 513 states [2024-11-24 00:15:26,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:15:26,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 513 interpolants. [2024-11-24 00:15:27,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131328, Invalid=131328, Unknown=0, NotChecked=0, Total=262656 [2024-11-24 00:15:27,001 INFO L87 Difference]: Start difference. First operand 1747 states and 2101 transitions. Second operand has 513 states, 513 states have (on average 2.017543859649123) internal successors, (1035), 513 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:15:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:15:36,306 INFO L93 Difference]: Finished difference Result 3496 states and 4460 transitions. [2024-11-24 00:15:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 512 states. [2024-11-24 00:15:36,307 INFO L78 Accepts]: Start accepts. Automaton has has 513 states, 513 states have (on average 2.017543859649123) internal successors, (1035), 513 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1746 [2024-11-24 00:15:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:15:36,317 INFO L225 Difference]: With dead ends: 3496 [2024-11-24 00:15:36,317 INFO L226 Difference]: Without dead ends: 2259 [2024-11-24 00:15:36,330 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3747 GetRequests, 3236 SyntacticMatches, 0 SemanticMatches, 511 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 113.3s TimeCoverageRelationStatistics Valid=131328, Invalid=131328, Unknown=0, NotChecked=0, Total=262656 [2024-11-24 00:15:36,331 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:15:36,331 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-24 00:15:36,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2024-11-24 00:15:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2259. [2024-11-24 00:15:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 1.1572187776793623) internal successors, (2613), 2258 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:15:36,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 2613 transitions. [2024-11-24 00:15:36,416 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 2613 transitions. Word has length 1746 [2024-11-24 00:15:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:15:36,417 INFO L471 AbstractCegarLoop]: Abstraction has 2259 states and 2613 transitions. [2024-11-24 00:15:36,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 513 states, 513 states have (on average 2.017543859649123) internal successors, (1035), 513 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:15:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 2613 transitions. [2024-11-24 00:15:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2259 [2024-11-24 00:15:36,514 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:15:36,515 INFO L218 NwaCegarLoop]: trace histogram [818, 510, 308, 308, 262, 46, 1, 1, 1, 1, 1, 1] [2024-11-24 00:15:36,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-24 00:15:36,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074ebed1-d2b3-4b3a-8874-117ab9247feb/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-24 00:15:36,716 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:15:36,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:15:36,717 INFO L85 PathProgramCache]: Analyzing trace with hash 929855487, now seen corresponding path program 14 times [2024-11-24 00:15:36,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:15:36,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425837395] [2024-11-24 00:15:36,717 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:15:36,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:15:41,475 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:15:41,479 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat