./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:06:50,077 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:06:50,150 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 02:06:50,158 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:06:50,162 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:06:50,188 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:06:50,188 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:06:50,188 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:06:50,189 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:06:50,189 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:06:50,189 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:06:50,189 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:06:50,189 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:06:50,189 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:06:50,190 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:06:50,190 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:06:50,190 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 02:06:50,190 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:06:50,190 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:06:50,190 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:06:50,190 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:06:50,190 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 02:06:50,190 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:06:50,191 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 02:06:50,191 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:06:50,191 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 02:06:50,191 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:06:50,191 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:06:50,191 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:06:50,191 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:06:50,191 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:06:50,191 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:06:50,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:06:50,191 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:06:50,192 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:06:50,192 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:06:50,192 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:06:50,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:06:50,192 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:06:50,192 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:06:50,192 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 02:06:50,192 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 02:06:50,192 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:06:50,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:06:50,192 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:06:50,193 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:06:50,193 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:06:50,193 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:06:50,193 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_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2024-11-28 02:06:50,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:06:50,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:06:50,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:06:50,473 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:06:50,473 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:06:50,474 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2024-11-28 02:06:51,074 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/data/3661f95e2/cc09ffb62d3c4a948ff43d815ee143a3/FLAG67b0ad8f1 [2024-11-28 02:06:55,782 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:06:55,786 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2024-11-28 02:06:55,798 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/data/3661f95e2/cc09ffb62d3c4a948ff43d815ee143a3/FLAG67b0ad8f1 [2024-11-28 02:06:55,812 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/data/3661f95e2/cc09ffb62d3c4a948ff43d815ee143a3 [2024-11-28 02:06:55,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:06:55,815 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:06:55,817 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:06:55,817 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:06:55,822 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:06:55,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c05f285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55, skipping insertion in model container [2024-11-28 02:06:55,824 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,844 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:06:56,023 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_eab45eaa-f301-4875-a7d5-3d81373de590/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2024-11-28 02:06:56,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:06:56,124 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:06:56,138 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_eab45eaa-f301-4875-a7d5-3d81373de590/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2024-11-28 02:06:56,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:06:56,222 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:06:56,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56 WrapperNode [2024-11-28 02:06:56,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:06:56,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:06:56,226 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:06:56,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:06:56,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56" (1/1) ... [2024-11-28 02:06:56,242 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56" (1/1) ... [2024-11-28 02:06:56,262 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2024-11-28 02:06:56,263 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:06:56,263 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:06:56,263 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:06:56,264 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:06:56,273 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56" (1/1) ... [2024-11-28 02:06:56,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56" (1/1) ... [2024-11-28 02:06:56,275 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56" (1/1) ... [2024-11-28 02:06:56,292 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]. [2024-11-28 02:06:56,293 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56" (1/1) ... [2024-11-28 02:06:56,293 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56" (1/1) ... [2024-11-28 02:06:56,300 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56" (1/1) ... [2024-11-28 02:06:56,305 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56" (1/1) ... [2024-11-28 02:06:56,309 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56" (1/1) ... [2024-11-28 02:06:56,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56" (1/1) ... [2024-11-28 02:06:56,312 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56" (1/1) ... [2024-11-28 02:06:56,314 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:06:56,315 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:06:56,315 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:06:56,315 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:06:56,317 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56" (1/1) ... [2024-11-28 02:06:56,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:06:56,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:06:56,364 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:06:56,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:06:56,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:06:56,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:06:56,398 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-28 02:06:56,398 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-28 02:06:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:06:56,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:06:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 02:06:56,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 02:06:56,483 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:06:56,485 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:06:56,932 INFO L? ?]: Removed 66 outVars from TransFormulas that were not future-live. [2024-11-28 02:06:56,932 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:06:56,941 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:06:56,942 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 02:06:56,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:06:56 BoogieIcfgContainer [2024-11-28 02:06:56,942 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:06:56,945 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:06:56,945 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:06:56,950 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:06:56,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:06:55" (1/3) ... [2024-11-28 02:06:56,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4abfdeff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:06:56, skipping insertion in model container [2024-11-28 02:06:56,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:56" (2/3) ... [2024-11-28 02:06:56,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4abfdeff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:06:56, skipping insertion in model container [2024-11-28 02:06:56,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:06:56" (3/3) ... [2024-11-28 02:06:56,952 INFO L128 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2024-11-28 02:06:56,968 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:06:56,969 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_3a.c.cil.c that has 3 procedures, 72 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-28 02:06:57,031 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:06:57,043 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;@50e33185, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:06:57,043 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 02:06:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 63 states have (on average 1.5714285714285714) internal successors, (99), 65 states have internal predecessors, (99), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 02:06:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 02:06:57,058 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:06:57,058 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:06:57,059 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:06:57,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:06:57,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1642172510, now seen corresponding path program 1 times [2024-11-28 02:06:57,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:06:57,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533401418] [2024-11-28 02:06:57,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:06:57,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:06:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:06:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:06:57,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:06:57,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533401418] [2024-11-28 02:06:57,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533401418] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:06:57,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:06:57,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:06:57,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093270453] [2024-11-28 02:06:57,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:06:57,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:06:57,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:06:57,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:06:57,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:06:57,471 INFO L87 Difference]: Start difference. First operand has 72 states, 63 states have (on average 1.5714285714285714) internal successors, (99), 65 states have internal predecessors, (99), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:06:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:06:57,525 INFO L93 Difference]: Finished difference Result 142 states and 221 transitions. [2024-11-28 02:06:57,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:06:57,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2024-11-28 02:06:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:06:57,539 INFO L225 Difference]: With dead ends: 142 [2024-11-28 02:06:57,540 INFO L226 Difference]: Without dead ends: 66 [2024-11-28 02:06:57,545 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:06:57,549 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:06:57,551 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:06:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-28 02:06:57,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-28 02:06:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 59 states have internal predecessors, (85), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 02:06:57,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 94 transitions. [2024-11-28 02:06:57,598 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 94 transitions. Word has length 41 [2024-11-28 02:06:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:06:57,599 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 94 transitions. [2024-11-28 02:06:57,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:06:57,600 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 94 transitions. [2024-11-28 02:06:57,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 02:06:57,603 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:06:57,603 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:06:57,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:06:57,604 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:06:57,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:06:57,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1065760984, now seen corresponding path program 1 times [2024-11-28 02:06:57,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:06:57,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426970991] [2024-11-28 02:06:57,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:06:57,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:06:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:06:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:06:57,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:06:57,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426970991] [2024-11-28 02:06:57,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426970991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:06:57,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:06:57,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:06:57,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539121792] [2024-11-28 02:06:57,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:06:57,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:06:57,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:06:57,847 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:06:57,847 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:06:57,847 INFO L87 Difference]: Start difference. First operand 66 states and 94 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:06:57,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:06:57,889 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2024-11-28 02:06:57,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:06:57,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2024-11-28 02:06:57,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:06:57,891 INFO L225 Difference]: With dead ends: 76 [2024-11-28 02:06:57,892 INFO L226 Difference]: Without dead ends: 66 [2024-11-28 02:06:57,892 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:06:57,893 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 0 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:06:57,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:06:57,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-28 02:06:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-28 02:06:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 59 states have (on average 1.423728813559322) internal successors, (84), 59 states have internal predecessors, (84), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 02:06:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 93 transitions. [2024-11-28 02:06:57,910 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 93 transitions. Word has length 43 [2024-11-28 02:06:57,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:06:57,910 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 93 transitions. [2024-11-28 02:06:57,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:06:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 93 transitions. [2024-11-28 02:06:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 02:06:57,914 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:06:57,914 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:06:57,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:06:57,915 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:06:57,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:06:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1875107610, now seen corresponding path program 1 times [2024-11-28 02:06:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:06:57,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545948925] [2024-11-28 02:06:57,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:06:57,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:06:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:06:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:06:58,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:06:58,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545948925] [2024-11-28 02:06:58,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545948925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:06:58,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427972764] [2024-11-28 02:06:58,214 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:06:58,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:06:58,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:06:58,217 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:06:58,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:06:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:06:58,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 02:06:58,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:06:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:06:58,430 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:06:58,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427972764] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:06:58,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:06:58,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-28 02:06:58,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907885739] [2024-11-28 02:06:58,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:06:58,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:06:58,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:06:58,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:06:58,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:06:58,432 INFO L87 Difference]: Start difference. First operand 66 states and 93 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:06:58,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:06:58,580 INFO L93 Difference]: Finished difference Result 148 states and 214 transitions. [2024-11-28 02:06:58,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:06:58,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2024-11-28 02:06:58,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:06:58,583 INFO L225 Difference]: With dead ends: 148 [2024-11-28 02:06:58,584 INFO L226 Difference]: Without dead ends: 85 [2024-11-28 02:06:58,584 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:06:58,585 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 19 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:06:58,586 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 213 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:06:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-28 02:06:58,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2024-11-28 02:06:58,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 70 states have internal predecessors, (99), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 02:06:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 110 transitions. [2024-11-28 02:06:58,596 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 110 transitions. Word has length 43 [2024-11-28 02:06:58,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:06:58,596 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 110 transitions. [2024-11-28 02:06:58,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:06:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 110 transitions. [2024-11-28 02:06:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 02:06:58,598 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:06:58,598 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:06:58,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 02:06:58,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-28 02:06:58,799 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:06:58,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:06:58,800 INFO L85 PathProgramCache]: Analyzing trace with hash -778080967, now seen corresponding path program 1 times [2024-11-28 02:06:58,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:06:58,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809221622] [2024-11-28 02:06:58,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:06:58,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:06:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:06:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:06:58,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:06:58,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809221622] [2024-11-28 02:06:58,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809221622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:06:58,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477782801] [2024-11-28 02:06:58,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:06:58,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:06:58,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:06:58,922 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:06:58,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:06:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:06:58,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:06:59,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:06:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:06:59,043 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:06:59,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477782801] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:06:59,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:06:59,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-28 02:06:59,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101692403] [2024-11-28 02:06:59,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:06:59,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:06:59,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:06:59,047 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:06:59,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:06:59,048 INFO L87 Difference]: Start difference. First operand 78 states and 110 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:06:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:06:59,135 INFO L93 Difference]: Finished difference Result 163 states and 233 transitions. [2024-11-28 02:06:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:06:59,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2024-11-28 02:06:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:06:59,137 INFO L225 Difference]: With dead ends: 163 [2024-11-28 02:06:59,137 INFO L226 Difference]: Without dead ends: 92 [2024-11-28 02:06:59,138 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:06:59,140 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 14 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:06:59,141 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 230 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:06:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-28 02:06:59,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2024-11-28 02:06:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 74 states have internal predecessors, (103), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 02:06:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 116 transitions. [2024-11-28 02:06:59,155 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 116 transitions. Word has length 45 [2024-11-28 02:06:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:06:59,160 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 116 transitions. [2024-11-28 02:06:59,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:06:59,161 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 116 transitions. [2024-11-28 02:06:59,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 02:06:59,162 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:06:59,162 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:06:59,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 02:06:59,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:06:59,363 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:06:59,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:06:59,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1986452266, now seen corresponding path program 1 times [2024-11-28 02:06:59,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:06:59,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832621679] [2024-11-28 02:06:59,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:06:59,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:06:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:06:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:06:59,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:06:59,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832621679] [2024-11-28 02:06:59,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832621679] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:06:59,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867251018] [2024-11-28 02:06:59,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:06:59,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:06:59,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:06:59,501 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:06:59,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:06:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:06:59,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:06:59,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:06:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:06:59,613 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:06:59,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867251018] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:06:59,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:06:59,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-28 02:06:59,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794180667] [2024-11-28 02:06:59,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:06:59,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:06:59,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:06:59,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:06:59,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:06:59,617 INFO L87 Difference]: Start difference. First operand 82 states and 116 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:06:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:06:59,695 INFO L93 Difference]: Finished difference Result 168 states and 241 transitions. [2024-11-28 02:06:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:06:59,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-11-28 02:06:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:06:59,698 INFO L225 Difference]: With dead ends: 168 [2024-11-28 02:06:59,698 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 02:06:59,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:06:59,699 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 15 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:06:59,700 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 232 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:06:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 02:06:59,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2024-11-28 02:06:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.4189189189189189) internal successors, (105), 75 states have internal predecessors, (105), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 02:06:59,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2024-11-28 02:06:59,717 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 46 [2024-11-28 02:06:59,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:06:59,718 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2024-11-28 02:06:59,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:06:59,718 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2024-11-28 02:06:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 02:06:59,723 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:06:59,724 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:06:59,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 02:06:59,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:06:59,924 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:06:59,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:06:59,925 INFO L85 PathProgramCache]: Analyzing trace with hash 618442972, now seen corresponding path program 1 times [2024-11-28 02:06:59,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:06:59,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299513214] [2024-11-28 02:06:59,925 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:06:59,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:06:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:07:00,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:00,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299513214] [2024-11-28 02:07:00,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299513214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:00,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372266492] [2024-11-28 02:07:00,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:00,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:00,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:00,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:00,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:07:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:00,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:07:00,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:07:00,251 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:07:00,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372266492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:00,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:00,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-28 02:07:00,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221218951] [2024-11-28 02:07:00,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:00,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:07:00,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:00,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:07:00,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:07:00,439 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 02:07:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:00,628 INFO L93 Difference]: Finished difference Result 216 states and 317 transitions. [2024-11-28 02:07:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:07:00,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 47 [2024-11-28 02:07:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:00,632 INFO L225 Difference]: With dead ends: 216 [2024-11-28 02:07:00,632 INFO L226 Difference]: Without dead ends: 140 [2024-11-28 02:07:00,632 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:07:00,635 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 107 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:00,635 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 483 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:07:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-28 02:07:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2024-11-28 02:07:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.4705882352941178) internal successors, (125), 86 states have internal predecessors, (125), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 02:07:00,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 138 transitions. [2024-11-28 02:07:00,652 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 138 transitions. Word has length 47 [2024-11-28 02:07:00,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:00,653 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 138 transitions. [2024-11-28 02:07:00,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 02:07:00,653 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 138 transitions. [2024-11-28 02:07:00,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 02:07:00,655 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:00,656 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:00,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:07:00,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:00,860 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:00,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:00,861 INFO L85 PathProgramCache]: Analyzing trace with hash 301032814, now seen corresponding path program 1 times [2024-11-28 02:07:00,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:00,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026571543] [2024-11-28 02:07:00,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:00,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:07:01,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:01,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026571543] [2024-11-28 02:07:01,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026571543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:01,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857936684] [2024-11-28 02:07:01,024 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:01,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:01,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:01,029 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:01,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:07:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:01,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:07:01,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:07:01,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:07:01,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857936684] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:01,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:01,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-28 02:07:01,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991997761] [2024-11-28 02:07:01,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:01,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:07:01,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:01,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:07:01,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:07:01,301 INFO L87 Difference]: Start difference. First operand 94 states and 138 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 02:07:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:01,471 INFO L93 Difference]: Finished difference Result 229 states and 343 transitions. [2024-11-28 02:07:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:07:01,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2024-11-28 02:07:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:01,473 INFO L225 Difference]: With dead ends: 229 [2024-11-28 02:07:01,473 INFO L226 Difference]: Without dead ends: 142 [2024-11-28 02:07:01,474 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:07:01,474 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 88 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:01,474 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 472 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:07:01,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-28 02:07:01,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2024-11-28 02:07:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 91 states have (on average 1.5054945054945055) internal successors, (137), 92 states have internal predecessors, (137), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 02:07:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 150 transitions. [2024-11-28 02:07:01,486 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 150 transitions. Word has length 48 [2024-11-28 02:07:01,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:01,486 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 150 transitions. [2024-11-28 02:07:01,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 02:07:01,486 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 150 transitions. [2024-11-28 02:07:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 02:07:01,487 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:01,487 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:01,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 02:07:01,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:01,691 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:01,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash -433039521, now seen corresponding path program 1 times [2024-11-28 02:07:01,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:01,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356051432] [2024-11-28 02:07:01,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:01,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:07:01,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:01,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356051432] [2024-11-28 02:07:01,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356051432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:01,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26563841] [2024-11-28 02:07:01,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:01,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:01,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:01,768 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:01,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:07:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:01,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-28 02:07:01,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:07:01,862 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:07:01,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26563841] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:01,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:07:01,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-11-28 02:07:01,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509690289] [2024-11-28 02:07:01,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:01,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:07:01,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:01,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:07:01,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:07:01,867 INFO L87 Difference]: Start difference. First operand 100 states and 150 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:07:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:01,921 INFO L93 Difference]: Finished difference Result 202 states and 310 transitions. [2024-11-28 02:07:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:07:01,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-11-28 02:07:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:01,924 INFO L225 Difference]: With dead ends: 202 [2024-11-28 02:07:01,924 INFO L226 Difference]: Without dead ends: 109 [2024-11-28 02:07:01,925 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:07:01,925 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 4 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:01,926 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 167 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:07:01,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-28 02:07:01,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2024-11-28 02:07:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 93 states have (on average 1.4946236559139785) internal successors, (139), 94 states have internal predecessors, (139), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 02:07:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 152 transitions. [2024-11-28 02:07:01,946 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 152 transitions. Word has length 50 [2024-11-28 02:07:01,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:01,948 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 152 transitions. [2024-11-28 02:07:01,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:07:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 152 transitions. [2024-11-28 02:07:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 02:07:01,950 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:01,950 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:01,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:02,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:02,151 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:02,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:02,152 INFO L85 PathProgramCache]: Analyzing trace with hash -262942373, now seen corresponding path program 1 times [2024-11-28 02:07:02,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:02,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630720300] [2024-11-28 02:07:02,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:02,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:07:02,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:02,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630720300] [2024-11-28 02:07:02,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630720300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:02,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779594424] [2024-11-28 02:07:02,227 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:02,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:02,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:02,229 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:02,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:07:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:02,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-28 02:07:02,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:07:02,335 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:07:02,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779594424] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:02,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:07:02,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-11-28 02:07:02,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396757234] [2024-11-28 02:07:02,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:02,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:07:02,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:02,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:07:02,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:07:02,340 INFO L87 Difference]: Start difference. First operand 102 states and 152 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:07:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:02,422 INFO L93 Difference]: Finished difference Result 200 states and 304 transitions. [2024-11-28 02:07:02,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:07:02,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-11-28 02:07:02,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:02,425 INFO L225 Difference]: With dead ends: 200 [2024-11-28 02:07:02,426 INFO L226 Difference]: Without dead ends: 105 [2024-11-28 02:07:02,427 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:07:02,428 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 7 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:02,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 165 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:07:02,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-28 02:07:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 98. [2024-11-28 02:07:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 89 states have (on average 1.4719101123595506) internal successors, (131), 90 states have internal predecessors, (131), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 02:07:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 144 transitions. [2024-11-28 02:07:02,448 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 144 transitions. Word has length 50 [2024-11-28 02:07:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:02,449 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 144 transitions. [2024-11-28 02:07:02,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:07:02,449 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 144 transitions. [2024-11-28 02:07:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 02:07:02,453 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:02,454 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:02,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:02,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:02,655 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:02,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:02,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1064207083, now seen corresponding path program 1 times [2024-11-28 02:07:02,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:02,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512835956] [2024-11-28 02:07:02,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:02,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:07:02,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:02,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512835956] [2024-11-28 02:07:02,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512835956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:02,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181487083] [2024-11-28 02:07:02,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:02,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:02,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:02,844 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:02,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:07:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:02,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 02:07:02,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:07:03,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:07:03,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181487083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:03,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:03,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 14] total 28 [2024-11-28 02:07:03,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39285731] [2024-11-28 02:07:03,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:03,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 02:07:03,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:03,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 02:07:03,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:07:03,784 INFO L87 Difference]: Start difference. First operand 98 states and 144 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 02:07:06,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:06,170 INFO L93 Difference]: Finished difference Result 332 states and 514 transitions. [2024-11-28 02:07:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 02:07:06,172 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 51 [2024-11-28 02:07:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:06,174 INFO L225 Difference]: With dead ends: 332 [2024-11-28 02:07:06,174 INFO L226 Difference]: Without dead ends: 212 [2024-11-28 02:07:06,178 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=351, Invalid=2841, Unknown=0, NotChecked=0, Total=3192 [2024-11-28 02:07:06,179 INFO L435 NwaCegarLoop]: 118 mSDtfsCounter, 285 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2239 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:06,179 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 2239 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 02:07:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-28 02:07:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 111. [2024-11-28 02:07:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 97 states have (on average 1.3917525773195876) internal successors, (135), 101 states have internal predecessors, (135), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2024-11-28 02:07:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 167 transitions. [2024-11-28 02:07:06,209 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 167 transitions. Word has length 51 [2024-11-28 02:07:06,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:06,210 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 167 transitions. [2024-11-28 02:07:06,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 02:07:06,210 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 167 transitions. [2024-11-28 02:07:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 02:07:06,212 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:06,212 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:06,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:06,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 02:07:06,416 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:06,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:06,417 INFO L85 PathProgramCache]: Analyzing trace with hash -448065723, now seen corresponding path program 2 times [2024-11-28 02:07:06,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:06,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342454985] [2024-11-28 02:07:06,417 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:06,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:06,443 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:07:06,443 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-28 02:07:06,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:06,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342454985] [2024-11-28 02:07:06,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342454985] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:06,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:06,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:07:06,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800715042] [2024-11-28 02:07:06,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:06,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:07:06,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:06,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:07:06,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:07:06,569 INFO L87 Difference]: Start difference. First operand 111 states and 167 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:07:06,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:06,626 INFO L93 Difference]: Finished difference Result 151 states and 222 transitions. [2024-11-28 02:07:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:07:06,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2024-11-28 02:07:06,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:06,631 INFO L225 Difference]: With dead ends: 151 [2024-11-28 02:07:06,631 INFO L226 Difference]: Without dead ends: 114 [2024-11-28 02:07:06,631 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:07:06,632 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 1 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:06,632 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 440 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:07:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-28 02:07:06,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-28 02:07:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 100 states have (on average 1.38) internal successors, (138), 103 states have internal predecessors, (138), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) [2024-11-28 02:07:06,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 170 transitions. [2024-11-28 02:07:06,654 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 170 transitions. Word has length 53 [2024-11-28 02:07:06,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:06,654 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 170 transitions. [2024-11-28 02:07:06,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:07:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 170 transitions. [2024-11-28 02:07:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 02:07:06,661 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:06,661 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:06,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 02:07:06,661 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:06,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:06,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1034871737, now seen corresponding path program 1 times [2024-11-28 02:07:06,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:06,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837838075] [2024-11-28 02:07:06,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:06,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:07:06,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:06,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837838075] [2024-11-28 02:07:06,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837838075] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:06,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83134853] [2024-11-28 02:07:06,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:06,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:06,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:06,877 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:06,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:07:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:06,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:07:06,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:07:07,051 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:07:07,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83134853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:07,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:07,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-11-28 02:07:07,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224012411] [2024-11-28 02:07:07,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:07,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:07:07,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:07,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:07:07,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:07:07,270 INFO L87 Difference]: Start difference. First operand 114 states and 170 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 02:07:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:07,561 INFO L93 Difference]: Finished difference Result 303 states and 450 transitions. [2024-11-28 02:07:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:07:07,561 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 53 [2024-11-28 02:07:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:07,563 INFO L225 Difference]: With dead ends: 303 [2024-11-28 02:07:07,563 INFO L226 Difference]: Without dead ends: 200 [2024-11-28 02:07:07,564 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:07:07,564 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 167 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:07,564 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 737 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:07:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-28 02:07:07,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 126. [2024-11-28 02:07:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 112 states have (on average 1.4464285714285714) internal successors, (162), 115 states have internal predecessors, (162), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) [2024-11-28 02:07:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 194 transitions. [2024-11-28 02:07:07,579 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 194 transitions. Word has length 53 [2024-11-28 02:07:07,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:07,579 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 194 transitions. [2024-11-28 02:07:07,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 02:07:07,580 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 194 transitions. [2024-11-28 02:07:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 02:07:07,581 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:07,581 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:07,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 02:07:07,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 02:07:07,782 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:07,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:07,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2066208236, now seen corresponding path program 1 times [2024-11-28 02:07:07,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:07,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727236594] [2024-11-28 02:07:07,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:07,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 02:07:07,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:07,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727236594] [2024-11-28 02:07:07,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727236594] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:07,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389958040] [2024-11-28 02:07:07,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:07,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:07,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:07,985 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:07,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:07:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:08,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:07:08,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 02:07:08,106 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:07:08,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389958040] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:08,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:07:08,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2024-11-28 02:07:08,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746361500] [2024-11-28 02:07:08,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:08,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:07:08,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:08,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:07:08,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:07:08,108 INFO L87 Difference]: Start difference. First operand 126 states and 194 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:07:08,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:08,161 INFO L93 Difference]: Finished difference Result 248 states and 392 transitions. [2024-11-28 02:07:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:07:08,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2024-11-28 02:07:08,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:08,163 INFO L225 Difference]: With dead ends: 248 [2024-11-28 02:07:08,163 INFO L226 Difference]: Without dead ends: 129 [2024-11-28 02:07:08,163 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:07:08,164 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:08,164 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 171 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:07:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-28 02:07:08,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2024-11-28 02:07:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 112 states have (on average 1.4285714285714286) internal successors, (160), 115 states have internal predecessors, (160), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) [2024-11-28 02:07:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 192 transitions. [2024-11-28 02:07:08,178 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 192 transitions. Word has length 53 [2024-11-28 02:07:08,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:08,178 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 192 transitions. [2024-11-28 02:07:08,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:07:08,179 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 192 transitions. [2024-11-28 02:07:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 02:07:08,180 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:08,180 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:08,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:08,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 02:07:08,381 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:08,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:08,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1710468579, now seen corresponding path program 1 times [2024-11-28 02:07:08,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:08,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252006604] [2024-11-28 02:07:08,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:08,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 02:07:08,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:08,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252006604] [2024-11-28 02:07:08,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252006604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:08,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757640923] [2024-11-28 02:07:08,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:08,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:08,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:08,617 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:08,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:07:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:08,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 02:07:08,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:07:08,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:07:09,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757640923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:09,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:09,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 15] total 32 [2024-11-28 02:07:09,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092009534] [2024-11-28 02:07:09,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:09,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 02:07:09,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:09,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 02:07:09,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2024-11-28 02:07:09,642 INFO L87 Difference]: Start difference. First operand 126 states and 192 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 27 states have internal predecessors, (90), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 02:07:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:12,596 INFO L93 Difference]: Finished difference Result 438 states and 735 transitions. [2024-11-28 02:07:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-28 02:07:12,597 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 27 states have internal predecessors, (90), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 54 [2024-11-28 02:07:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:12,615 INFO L225 Difference]: With dead ends: 438 [2024-11-28 02:07:12,616 INFO L226 Difference]: Without dead ends: 401 [2024-11-28 02:07:12,619 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=436, Invalid=4120, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 02:07:12,620 INFO L435 NwaCegarLoop]: 159 mSDtfsCounter, 346 mSDsluCounter, 3708 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 3867 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:12,620 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 3867 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1841 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 02:07:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2024-11-28 02:07:12,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 173. [2024-11-28 02:07:12,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 157 states have (on average 1.3885350318471337) internal successors, (218), 158 states have internal predecessors, (218), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (34), 11 states have call predecessors, (34), 8 states have call successors, (34) [2024-11-28 02:07:12,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 261 transitions. [2024-11-28 02:07:12,649 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 261 transitions. Word has length 54 [2024-11-28 02:07:12,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:12,650 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 261 transitions. [2024-11-28 02:07:12,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 27 states have internal predecessors, (90), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 02:07:12,650 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 261 transitions. [2024-11-28 02:07:12,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 02:07:12,652 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:12,652 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:12,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:12,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:12,856 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:12,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:12,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1431019994, now seen corresponding path program 1 times [2024-11-28 02:07:12,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:12,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37319208] [2024-11-28 02:07:12,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:12,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 02:07:12,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:12,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37319208] [2024-11-28 02:07:12,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37319208] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:12,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:12,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:07:12,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241626831] [2024-11-28 02:07:12,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:12,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:07:12,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:12,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:07:12,980 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:07:12,981 INFO L87 Difference]: Start difference. First operand 173 states and 261 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:07:13,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:13,019 INFO L93 Difference]: Finished difference Result 179 states and 266 transitions. [2024-11-28 02:07:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:07:13,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2024-11-28 02:07:13,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:13,021 INFO L225 Difference]: With dead ends: 179 [2024-11-28 02:07:13,021 INFO L226 Difference]: Without dead ends: 162 [2024-11-28 02:07:13,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:07:13,022 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 1 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:13,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 443 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:07:13,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-28 02:07:13,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2024-11-28 02:07:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 145 states have (on average 1.4) internal successors, (203), 147 states have internal predecessors, (203), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-28 02:07:13,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 239 transitions. [2024-11-28 02:07:13,041 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 239 transitions. Word has length 57 [2024-11-28 02:07:13,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:13,042 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 239 transitions. [2024-11-28 02:07:13,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:07:13,042 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 239 transitions. [2024-11-28 02:07:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 02:07:13,043 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:13,043 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:13,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 02:07:13,044 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:13,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:13,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1474643764, now seen corresponding path program 1 times [2024-11-28 02:07:13,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:13,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025078630] [2024-11-28 02:07:13,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:13,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 02:07:13,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:13,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025078630] [2024-11-28 02:07:13,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025078630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:13,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768181537] [2024-11-28 02:07:13,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:13,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:13,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:13,246 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:13,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:07:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:13,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 02:07:13,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 02:07:13,399 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:07:13,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768181537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:13,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:07:13,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2024-11-28 02:07:13,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555008455] [2024-11-28 02:07:13,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:13,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 02:07:13,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:13,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 02:07:13,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:07:13,401 INFO L87 Difference]: Start difference. First operand 160 states and 239 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:07:13,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:13,521 INFO L93 Difference]: Finished difference Result 243 states and 365 transitions. [2024-11-28 02:07:13,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:07:13,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-11-28 02:07:13,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:13,524 INFO L225 Difference]: With dead ends: 243 [2024-11-28 02:07:13,524 INFO L226 Difference]: Without dead ends: 205 [2024-11-28 02:07:13,524 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:07:13,525 INFO L435 NwaCegarLoop]: 135 mSDtfsCounter, 47 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:13,525 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 868 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:07:13,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-28 02:07:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2024-11-28 02:07:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 187 states have (on average 1.3796791443850267) internal successors, (258), 187 states have internal predecessors, (258), 10 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (44), 14 states have call predecessors, (44), 9 states have call successors, (44) [2024-11-28 02:07:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 312 transitions. [2024-11-28 02:07:13,558 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 312 transitions. Word has length 58 [2024-11-28 02:07:13,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:13,558 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 312 transitions. [2024-11-28 02:07:13,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:07:13,559 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 312 transitions. [2024-11-28 02:07:13,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 02:07:13,561 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:13,561 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:13,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:13,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 02:07:13,762 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:13,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:13,762 INFO L85 PathProgramCache]: Analyzing trace with hash 131296346, now seen corresponding path program 1 times [2024-11-28 02:07:13,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:13,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599295845] [2024-11-28 02:07:13,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:13,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 02:07:13,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:13,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599295845] [2024-11-28 02:07:13,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599295845] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:13,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531748915] [2024-11-28 02:07:13,988 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:13,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:13,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:13,992 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:13,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:07:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:14,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 02:07:14,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:07:15,227 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:07:15,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531748915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:15,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:15,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 12] total 27 [2024-11-28 02:07:15,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105355340] [2024-11-28 02:07:15,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:15,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 02:07:15,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:15,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 02:07:15,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2024-11-28 02:07:15,657 INFO L87 Difference]: Start difference. First operand 205 states and 312 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 22 states have internal predecessors, (87), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 02:07:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:16,460 INFO L93 Difference]: Finished difference Result 457 states and 727 transitions. [2024-11-28 02:07:16,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 02:07:16,461 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 22 states have internal predecessors, (87), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2024-11-28 02:07:16,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:16,466 INFO L225 Difference]: With dead ends: 457 [2024-11-28 02:07:16,466 INFO L226 Difference]: Without dead ends: 325 [2024-11-28 02:07:16,467 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 02:07:16,468 INFO L435 NwaCegarLoop]: 126 mSDtfsCounter, 291 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 2222 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:16,468 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 2222 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:07:16,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-28 02:07:16,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 227. [2024-11-28 02:07:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 200 states have (on average 1.35) internal successors, (270), 202 states have internal predecessors, (270), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 21 states have call predecessors, (109), 16 states have call successors, (109) [2024-11-28 02:07:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 396 transitions. [2024-11-28 02:07:16,510 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 396 transitions. Word has length 62 [2024-11-28 02:07:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:16,510 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 396 transitions. [2024-11-28 02:07:16,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 22 states have internal predecessors, (87), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 02:07:16,511 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 396 transitions. [2024-11-28 02:07:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 02:07:16,513 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:16,514 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:16,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 02:07:16,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 02:07:16,714 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:16,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:16,715 INFO L85 PathProgramCache]: Analyzing trace with hash -970510599, now seen corresponding path program 1 times [2024-11-28 02:07:16,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:16,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342914553] [2024-11-28 02:07:16,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:16,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 02:07:16,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:16,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342914553] [2024-11-28 02:07:16,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342914553] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:16,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:16,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:07:16,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206701721] [2024-11-28 02:07:16,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:16,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:07:16,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:16,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:07:16,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:07:16,892 INFO L87 Difference]: Start difference. First operand 227 states and 396 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:07:16,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:16,993 INFO L93 Difference]: Finished difference Result 427 states and 707 transitions. [2024-11-28 02:07:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:07:16,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2024-11-28 02:07:16,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:16,997 INFO L225 Difference]: With dead ends: 427 [2024-11-28 02:07:16,997 INFO L226 Difference]: Without dead ends: 233 [2024-11-28 02:07:16,998 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:07:16,999 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 9 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:16,999 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 246 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:07:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-11-28 02:07:17,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 225. [2024-11-28 02:07:17,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 198 states have (on average 1.3434343434343434) internal successors, (266), 200 states have internal predecessors, (266), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 21 states have call predecessors, (109), 16 states have call successors, (109) [2024-11-28 02:07:17,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 392 transitions. [2024-11-28 02:07:17,036 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 392 transitions. Word has length 63 [2024-11-28 02:07:17,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:17,036 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 392 transitions. [2024-11-28 02:07:17,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:07:17,037 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 392 transitions. [2024-11-28 02:07:17,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 02:07:17,040 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:17,040 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:17,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 02:07:17,040 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:17,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1886100628, now seen corresponding path program 1 times [2024-11-28 02:07:17,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:17,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865536820] [2024-11-28 02:07:17,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 02:07:17,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:17,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865536820] [2024-11-28 02:07:17,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865536820] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:17,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640690523] [2024-11-28 02:07:17,213 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:17,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:17,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:17,215 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:17,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:07:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:17,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 02:07:17,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 02:07:17,356 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-28 02:07:17,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640690523] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:17,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:07:17,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 13 [2024-11-28 02:07:17,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220688611] [2024-11-28 02:07:17,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:17,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:07:17,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:17,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:07:17,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:07:17,467 INFO L87 Difference]: Start difference. First operand 225 states and 392 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:07:17,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:17,567 INFO L93 Difference]: Finished difference Result 251 states and 420 transitions. [2024-11-28 02:07:17,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:07:17,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2024-11-28 02:07:17,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:17,570 INFO L225 Difference]: With dead ends: 251 [2024-11-28 02:07:17,570 INFO L226 Difference]: Without dead ends: 239 [2024-11-28 02:07:17,570 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:07:17,571 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 8 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:17,571 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 329 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:07:17,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-28 02:07:17,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 226. [2024-11-28 02:07:17,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 199 states have (on average 1.3467336683417086) internal successors, (268), 201 states have internal predecessors, (268), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 21 states have call predecessors, (109), 16 states have call successors, (109) [2024-11-28 02:07:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 394 transitions. [2024-11-28 02:07:17,624 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 394 transitions. Word has length 63 [2024-11-28 02:07:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:17,624 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 394 transitions. [2024-11-28 02:07:17,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:07:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 394 transitions. [2024-11-28 02:07:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 02:07:17,628 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:17,628 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:17,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 02:07:17,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:17,829 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:17,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:17,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1299294614, now seen corresponding path program 1 times [2024-11-28 02:07:17,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:17,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474540933] [2024-11-28 02:07:17,829 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:17,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:07:17,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:17,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474540933] [2024-11-28 02:07:17,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474540933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:17,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391726605] [2024-11-28 02:07:17,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:17,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:17,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:17,990 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:17,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:07:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:18,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:07:18,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:07:18,281 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:07:18,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391726605] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:18,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:07:18,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2024-11-28 02:07:18,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772831500] [2024-11-28 02:07:18,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:18,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 02:07:18,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:18,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 02:07:18,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:07:18,283 INFO L87 Difference]: Start difference. First operand 226 states and 394 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:07:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:18,541 INFO L93 Difference]: Finished difference Result 456 states and 788 transitions. [2024-11-28 02:07:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:07:18,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2024-11-28 02:07:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:18,545 INFO L225 Difference]: With dead ends: 456 [2024-11-28 02:07:18,546 INFO L226 Difference]: Without dead ends: 255 [2024-11-28 02:07:18,547 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:07:18,549 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 28 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:18,549 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 460 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:07:18,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-28 02:07:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 226. [2024-11-28 02:07:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 199 states have (on average 1.3467336683417086) internal successors, (268), 201 states have internal predecessors, (268), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 21 states have call predecessors, (109), 16 states have call successors, (109) [2024-11-28 02:07:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 394 transitions. [2024-11-28 02:07:18,592 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 394 transitions. Word has length 63 [2024-11-28 02:07:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:18,593 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 394 transitions. [2024-11-28 02:07:18,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:07:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 394 transitions. [2024-11-28 02:07:18,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-28 02:07:18,597 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:18,597 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:18,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 02:07:18,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:18,802 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:18,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:18,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1338372827, now seen corresponding path program 1 times [2024-11-28 02:07:18,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:18,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58237862] [2024-11-28 02:07:18,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:18,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:07:19,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:19,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58237862] [2024-11-28 02:07:19,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58237862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:19,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908454426] [2024-11-28 02:07:19,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:19,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:19,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:19,254 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:19,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:07:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:19,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 02:07:19,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:07:20,072 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:07:21,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908454426] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:21,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:21,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 19] total 44 [2024-11-28 02:07:21,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940686753] [2024-11-28 02:07:21,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:21,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 02:07:21,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:21,059 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 02:07:21,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 02:07:21,059 INFO L87 Difference]: Start difference. First operand 226 states and 394 transitions. Second operand has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 40 states have internal predecessors, (118), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 02:07:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:28,766 INFO L93 Difference]: Finished difference Result 779 states and 1500 transitions. [2024-11-28 02:07:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-28 02:07:28,767 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 40 states have internal predecessors, (118), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2024-11-28 02:07:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:28,773 INFO L225 Difference]: With dead ends: 779 [2024-11-28 02:07:28,773 INFO L226 Difference]: Without dead ends: 546 [2024-11-28 02:07:28,779 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4152 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2136, Invalid=13614, Unknown=0, NotChecked=0, Total=15750 [2024-11-28 02:07:28,780 INFO L435 NwaCegarLoop]: 117 mSDtfsCounter, 1007 mSDsluCounter, 3294 mSDsCounter, 0 mSdLazyCounter, 3775 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 3411 SdHoareTripleChecker+Invalid, 4145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 3775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:28,780 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 3411 Invalid, 4145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 3775 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-28 02:07:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2024-11-28 02:07:28,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 233. [2024-11-28 02:07:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 206 states have (on average 1.3689320388349515) internal successors, (282), 208 states have internal predecessors, (282), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 21 states have call predecessors, (109), 16 states have call successors, (109) [2024-11-28 02:07:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 408 transitions. [2024-11-28 02:07:28,849 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 408 transitions. Word has length 65 [2024-11-28 02:07:28,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:28,849 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 408 transitions. [2024-11-28 02:07:28,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 40 states have internal predecessors, (118), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 02:07:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 408 transitions. [2024-11-28 02:07:28,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-28 02:07:28,851 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:28,851 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:28,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 02:07:29,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 02:07:29,052 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:29,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:29,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2030556381, now seen corresponding path program 1 times [2024-11-28 02:07:29,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:29,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484985602] [2024-11-28 02:07:29,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:29,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:07:29,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:29,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484985602] [2024-11-28 02:07:29,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484985602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:29,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166574322] [2024-11-28 02:07:29,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:29,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:29,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:29,332 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:29,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 02:07:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:29,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 02:07:29,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:07:29,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:07:29,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166574322] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:29,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:29,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2024-11-28 02:07:29,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285936052] [2024-11-28 02:07:29,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:29,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 02:07:29,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:29,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 02:07:29,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 02:07:29,972 INFO L87 Difference]: Start difference. First operand 233 states and 408 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 02:07:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:30,345 INFO L93 Difference]: Finished difference Result 617 states and 986 transitions. [2024-11-28 02:07:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 02:07:30,346 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2024-11-28 02:07:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:30,354 INFO L225 Difference]: With dead ends: 617 [2024-11-28 02:07:30,355 INFO L226 Difference]: Without dead ends: 413 [2024-11-28 02:07:30,357 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=525, Invalid=957, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 02:07:30,359 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 419 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:30,359 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 967 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:07:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2024-11-28 02:07:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 250. [2024-11-28 02:07:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 223 states have (on average 1.4170403587443947) internal successors, (316), 225 states have internal predecessors, (316), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 21 states have call predecessors, (109), 16 states have call successors, (109) [2024-11-28 02:07:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 442 transitions. [2024-11-28 02:07:30,394 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 442 transitions. Word has length 68 [2024-11-28 02:07:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:30,395 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 442 transitions. [2024-11-28 02:07:30,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 02:07:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 442 transitions. [2024-11-28 02:07:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-28 02:07:30,397 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:30,397 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:30,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:30,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 02:07:30,602 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:30,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:30,602 INFO L85 PathProgramCache]: Analyzing trace with hash 630968232, now seen corresponding path program 1 times [2024-11-28 02:07:30,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:30,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576920140] [2024-11-28 02:07:30,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:30,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:07:30,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:30,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576920140] [2024-11-28 02:07:30,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576920140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:30,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580310865] [2024-11-28 02:07:30,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:30,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:30,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:30,999 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:31,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 02:07:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:31,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 02:07:31,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:07:31,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:07:32,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580310865] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:32,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:32,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 18] total 43 [2024-11-28 02:07:32,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127099380] [2024-11-28 02:07:32,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:32,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-28 02:07:32,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:32,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-28 02:07:32,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 02:07:32,419 INFO L87 Difference]: Start difference. First operand 250 states and 442 transitions. Second operand has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 41 states have internal predecessors, (125), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 02:07:42,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:42,672 INFO L93 Difference]: Finished difference Result 834 states and 1615 transitions. [2024-11-28 02:07:42,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-28 02:07:42,673 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 41 states have internal predecessors, (125), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 75 [2024-11-28 02:07:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:42,681 INFO L225 Difference]: With dead ends: 834 [2024-11-28 02:07:42,681 INFO L226 Difference]: Without dead ends: 595 [2024-11-28 02:07:42,687 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4840 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2517, Invalid=14775, Unknown=0, NotChecked=0, Total=17292 [2024-11-28 02:07:42,688 INFO L435 NwaCegarLoop]: 112 mSDtfsCounter, 1319 mSDsluCounter, 2927 mSDsCounter, 0 mSdLazyCounter, 3994 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 3039 SdHoareTripleChecker+Invalid, 4455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 3994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:42,688 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1319 Valid, 3039 Invalid, 4455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 3994 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-28 02:07:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2024-11-28 02:07:42,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 255. [2024-11-28 02:07:42,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 228 states have (on average 1.4166666666666667) internal successors, (323), 228 states have internal predecessors, (323), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 23 states have call predecessors, (109), 16 states have call successors, (109) [2024-11-28 02:07:42,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 449 transitions. [2024-11-28 02:07:42,758 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 449 transitions. Word has length 75 [2024-11-28 02:07:42,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:42,758 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 449 transitions. [2024-11-28 02:07:42,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 41 states have internal predecessors, (125), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 02:07:42,759 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 449 transitions. [2024-11-28 02:07:42,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-28 02:07:42,761 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:42,761 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:42,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 02:07:42,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:42,962 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:42,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:42,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1917688070, now seen corresponding path program 1 times [2024-11-28 02:07:42,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:42,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104549700] [2024-11-28 02:07:42,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:42,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:07:43,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:43,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104549700] [2024-11-28 02:07:43,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104549700] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:43,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467756975] [2024-11-28 02:07:43,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:43,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:43,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:43,257 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:43,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 02:07:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:43,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 02:07:43,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 25 proven. 56 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:07:43,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:07:43,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467756975] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:43,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:43,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2024-11-28 02:07:43,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849090097] [2024-11-28 02:07:43,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:43,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 02:07:43,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:43,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 02:07:43,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2024-11-28 02:07:43,908 INFO L87 Difference]: Start difference. First operand 255 states and 449 transitions. Second operand has 31 states, 31 states have (on average 3.935483870967742) internal successors, (122), 31 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:07:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:45,078 INFO L93 Difference]: Finished difference Result 632 states and 1071 transitions. [2024-11-28 02:07:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:07:45,079 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.935483870967742) internal successors, (122), 31 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 77 [2024-11-28 02:07:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:45,083 INFO L225 Difference]: With dead ends: 632 [2024-11-28 02:07:45,083 INFO L226 Difference]: Without dead ends: 398 [2024-11-28 02:07:45,085 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=953, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 02:07:45,086 INFO L435 NwaCegarLoop]: 130 mSDtfsCounter, 410 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:45,087 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 1679 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 02:07:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2024-11-28 02:07:45,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 260. [2024-11-28 02:07:45,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 233 states have (on average 1.4120171673819744) internal successors, (329), 233 states have internal predecessors, (329), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 23 states have call predecessors, (109), 16 states have call successors, (109) [2024-11-28 02:07:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 455 transitions. [2024-11-28 02:07:45,129 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 455 transitions. Word has length 77 [2024-11-28 02:07:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:45,129 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 455 transitions. [2024-11-28 02:07:45,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.935483870967742) internal successors, (122), 31 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:07:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 455 transitions. [2024-11-28 02:07:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-28 02:07:45,133 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:45,133 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:45,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 02:07:45,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:45,337 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:45,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:45,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2063431462, now seen corresponding path program 1 times [2024-11-28 02:07:45,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:45,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896298431] [2024-11-28 02:07:45,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:45,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-28 02:07:45,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:45,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896298431] [2024-11-28 02:07:45,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896298431] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:45,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475219360] [2024-11-28 02:07:45,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:45,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:45,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:45,551 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:45,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 02:07:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:45,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 02:07:45,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-28 02:07:45,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-28 02:07:45,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475219360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:45,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:45,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11] total 21 [2024-11-28 02:07:45,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637344251] [2024-11-28 02:07:45,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:45,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 02:07:45,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:45,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 02:07:45,989 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:07:45,989 INFO L87 Difference]: Start difference. First operand 260 states and 455 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 17 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:07:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:46,178 INFO L93 Difference]: Finished difference Result 277 states and 471 transitions. [2024-11-28 02:07:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:07:46,179 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 17 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) Word has length 78 [2024-11-28 02:07:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:46,181 INFO L225 Difference]: With dead ends: 277 [2024-11-28 02:07:46,181 INFO L226 Difference]: Without dead ends: 231 [2024-11-28 02:07:46,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2024-11-28 02:07:46,183 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 3 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:46,183 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1028 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:07:46,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-28 02:07:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2024-11-28 02:07:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 206 states have (on average 1.4174757281553398) internal successors, (292), 207 states have internal predecessors, (292), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:07:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 393 transitions. [2024-11-28 02:07:46,231 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 393 transitions. Word has length 78 [2024-11-28 02:07:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:46,231 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 393 transitions. [2024-11-28 02:07:46,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 17 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:07:46,232 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 393 transitions. [2024-11-28 02:07:46,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 02:07:46,233 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:46,234 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:46,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:46,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 02:07:46,434 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:46,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:46,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1141500570, now seen corresponding path program 1 times [2024-11-28 02:07:46,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:46,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217483136] [2024-11-28 02:07:46,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:46,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 02:07:46,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:46,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217483136] [2024-11-28 02:07:46,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217483136] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:46,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:46,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:07:46,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358652384] [2024-11-28 02:07:46,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:46,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:07:46,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:46,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:07:46,598 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:07:46,599 INFO L87 Difference]: Start difference. First operand 231 states and 393 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:07:46,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:46,670 INFO L93 Difference]: Finished difference Result 251 states and 413 transitions. [2024-11-28 02:07:46,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:07:46,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 79 [2024-11-28 02:07:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:46,674 INFO L225 Difference]: With dead ends: 251 [2024-11-28 02:07:46,674 INFO L226 Difference]: Without dead ends: 239 [2024-11-28 02:07:46,674 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:07:46,675 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 1 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:46,676 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 355 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:07:46,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-28 02:07:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 231. [2024-11-28 02:07:46,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 206 states have (on average 1.4029126213592233) internal successors, (289), 207 states have internal predecessors, (289), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:07:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 390 transitions. [2024-11-28 02:07:46,720 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 390 transitions. Word has length 79 [2024-11-28 02:07:46,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:46,720 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 390 transitions. [2024-11-28 02:07:46,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:07:46,721 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 390 transitions. [2024-11-28 02:07:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 02:07:46,723 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:46,723 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:46,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-28 02:07:46,725 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:46,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:46,726 INFO L85 PathProgramCache]: Analyzing trace with hash 830774723, now seen corresponding path program 1 times [2024-11-28 02:07:46,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:46,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340470224] [2024-11-28 02:07:46,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:46,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:07:47,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:47,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340470224] [2024-11-28 02:07:47,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340470224] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:47,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256657388] [2024-11-28 02:07:47,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:47,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:47,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:47,248 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:47,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 02:07:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:47,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 02:07:47,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-28 02:07:47,881 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:07:47,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256657388] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:47,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:07:47,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2024-11-28 02:07:47,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512765976] [2024-11-28 02:07:47,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:47,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:07:47,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:47,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:07:47,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:07:47,883 INFO L87 Difference]: Start difference. First operand 231 states and 390 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:07:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:48,037 INFO L93 Difference]: Finished difference Result 266 states and 432 transitions. [2024-11-28 02:07:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:07:48,038 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 80 [2024-11-28 02:07:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:48,041 INFO L225 Difference]: With dead ends: 266 [2024-11-28 02:07:48,041 INFO L226 Difference]: Without dead ends: 235 [2024-11-28 02:07:48,041 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-11-28 02:07:48,042 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 47 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:48,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 607 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:07:48,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-28 02:07:48,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2024-11-28 02:07:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 208 states have (on average 1.3990384615384615) internal successors, (291), 209 states have internal predecessors, (291), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:07:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 392 transitions. [2024-11-28 02:07:48,102 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 392 transitions. Word has length 80 [2024-11-28 02:07:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:48,103 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 392 transitions. [2024-11-28 02:07:48,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:07:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 392 transitions. [2024-11-28 02:07:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-28 02:07:48,107 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:48,107 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:48,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 02:07:48,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 02:07:48,308 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:48,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:48,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1358461574, now seen corresponding path program 1 times [2024-11-28 02:07:48,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:48,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709997884] [2024-11-28 02:07:48,308 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:48,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:07:48,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:48,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709997884] [2024-11-28 02:07:48,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709997884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:48,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042899199] [2024-11-28 02:07:48,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:48,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:48,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:48,718 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:48,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 02:07:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:48,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:07:48,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-28 02:07:48,873 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:07:48,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042899199] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:48,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:07:48,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2024-11-28 02:07:48,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121730905] [2024-11-28 02:07:48,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:48,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:07:48,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:48,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:07:48,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:07:48,875 INFO L87 Difference]: Start difference. First operand 233 states and 392 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:07:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:48,928 INFO L93 Difference]: Finished difference Result 261 states and 420 transitions. [2024-11-28 02:07:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:07:48,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 81 [2024-11-28 02:07:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:48,930 INFO L225 Difference]: With dead ends: 261 [2024-11-28 02:07:48,930 INFO L226 Difference]: Without dead ends: 247 [2024-11-28 02:07:48,931 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:07:48,931 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 0 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:48,931 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 334 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:07:48,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-28 02:07:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 229. [2024-11-28 02:07:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 204 states have (on average 1.4019607843137254) internal successors, (286), 206 states have internal predecessors, (286), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 19 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:07:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 387 transitions. [2024-11-28 02:07:48,965 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 387 transitions. Word has length 81 [2024-11-28 02:07:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:48,965 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 387 transitions. [2024-11-28 02:07:48,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:07:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 387 transitions. [2024-11-28 02:07:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-28 02:07:48,967 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:48,968 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:48,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 02:07:49,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 02:07:49,169 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:49,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:49,169 INFO L85 PathProgramCache]: Analyzing trace with hash -204725018, now seen corresponding path program 1 times [2024-11-28 02:07:49,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:49,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931121659] [2024-11-28 02:07:49,169 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:49,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:07:49,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:49,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931121659] [2024-11-28 02:07:49,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931121659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:49,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204897831] [2024-11-28 02:07:49,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:49,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:49,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:49,592 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:49,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 02:07:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:49,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 02:07:49,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-28 02:07:49,881 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:07:49,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204897831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:49,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:07:49,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 22 [2024-11-28 02:07:49,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88775924] [2024-11-28 02:07:49,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:49,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:07:49,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:49,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:07:49,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2024-11-28 02:07:49,882 INFO L87 Difference]: Start difference. First operand 229 states and 387 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:07:50,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:50,074 INFO L93 Difference]: Finished difference Result 272 states and 436 transitions. [2024-11-28 02:07:50,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:07:50,075 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 82 [2024-11-28 02:07:50,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:50,077 INFO L225 Difference]: With dead ends: 272 [2024-11-28 02:07:50,077 INFO L226 Difference]: Without dead ends: 245 [2024-11-28 02:07:50,077 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2024-11-28 02:07:50,078 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 53 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:50,078 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 670 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:07:50,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-28 02:07:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 233. [2024-11-28 02:07:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 208 states have (on average 1.3942307692307692) internal successors, (290), 210 states have internal predecessors, (290), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 19 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:07:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 391 transitions. [2024-11-28 02:07:50,110 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 391 transitions. Word has length 82 [2024-11-28 02:07:50,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:50,110 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 391 transitions. [2024-11-28 02:07:50,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:07:50,111 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 391 transitions. [2024-11-28 02:07:50,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-28 02:07:50,113 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:50,113 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:50,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 02:07:50,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 02:07:50,317 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:50,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:50,318 INFO L85 PathProgramCache]: Analyzing trace with hash 934999088, now seen corresponding path program 1 times [2024-11-28 02:07:50,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:50,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026139372] [2024-11-28 02:07:50,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:50,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-28 02:07:50,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:50,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026139372] [2024-11-28 02:07:50,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026139372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:50,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81582456] [2024-11-28 02:07:50,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:50,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:50,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:50,467 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:50,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 02:07:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:50,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 02:07:50,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-28 02:07:50,597 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-28 02:07:50,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81582456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:50,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:50,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2024-11-28 02:07:50,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56596850] [2024-11-28 02:07:50,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:50,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:07:50,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:50,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:07:50,792 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:07:50,792 INFO L87 Difference]: Start difference. First operand 233 states and 391 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 12 states have internal predecessors, (67), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 02:07:50,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:50,899 INFO L93 Difference]: Finished difference Result 280 states and 445 transitions. [2024-11-28 02:07:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:07:50,900 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 12 states have internal predecessors, (67), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2024-11-28 02:07:50,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:50,902 INFO L225 Difference]: With dead ends: 280 [2024-11-28 02:07:50,902 INFO L226 Difference]: Without dead ends: 245 [2024-11-28 02:07:50,903 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:07:50,903 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 91 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:50,904 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 843 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:07:50,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-28 02:07:50,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 233. [2024-11-28 02:07:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 208 states have (on average 1.3846153846153846) internal successors, (288), 210 states have internal predecessors, (288), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 19 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:07:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 389 transitions. [2024-11-28 02:07:50,945 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 389 transitions. Word has length 83 [2024-11-28 02:07:50,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:50,945 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 389 transitions. [2024-11-28 02:07:50,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 12 states have internal predecessors, (67), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 02:07:50,945 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 389 transitions. [2024-11-28 02:07:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-28 02:07:50,947 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:50,948 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:50,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 02:07:51,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:51,148 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:51,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:51,149 INFO L85 PathProgramCache]: Analyzing trace with hash -753944654, now seen corresponding path program 1 times [2024-11-28 02:07:51,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:51,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640204684] [2024-11-28 02:07:51,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:51,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:07:51,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:51,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640204684] [2024-11-28 02:07:51,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640204684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:51,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077406124] [2024-11-28 02:07:51,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:51,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:51,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:51,554 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:51,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 02:07:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:51,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:07:51,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-28 02:07:52,014 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-28 02:07:52,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077406124] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:52,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:52,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 25 [2024-11-28 02:07:52,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447804296] [2024-11-28 02:07:52,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:52,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:07:52,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:52,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:07:52,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:07:52,204 INFO L87 Difference]: Start difference. First operand 233 states and 389 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 23 states have internal predecessors, (87), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-28 02:07:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:07:53,251 INFO L93 Difference]: Finished difference Result 504 states and 834 transitions. [2024-11-28 02:07:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:07:53,252 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 23 states have internal predecessors, (87), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 83 [2024-11-28 02:07:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:07:53,254 INFO L225 Difference]: With dead ends: 504 [2024-11-28 02:07:53,254 INFO L226 Difference]: Without dead ends: 299 [2024-11-28 02:07:53,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 02:07:53,258 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 154 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:07:53,258 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1459 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 02:07:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-28 02:07:53,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 233. [2024-11-28 02:07:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 208 states have (on average 1.3798076923076923) internal successors, (287), 210 states have internal predecessors, (287), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 19 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:07:53,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 388 transitions. [2024-11-28 02:07:53,299 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 388 transitions. Word has length 83 [2024-11-28 02:07:53,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:07:53,300 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 388 transitions. [2024-11-28 02:07:53,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 23 states have internal predecessors, (87), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-28 02:07:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 388 transitions. [2024-11-28 02:07:53,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-28 02:07:53,302 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:07:53,303 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:53,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 02:07:53,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-28 02:07:53,504 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:07:53,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:53,504 INFO L85 PathProgramCache]: Analyzing trace with hash 959670467, now seen corresponding path program 2 times [2024-11-28 02:07:53,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:53,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281326840] [2024-11-28 02:07:53,504 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:53,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:53,555 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:53,555 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 4 proven. 249 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:07:54,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:54,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281326840] [2024-11-28 02:07:54,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281326840] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:54,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645567295] [2024-11-28 02:07:54,302 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:54,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:54,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:54,304 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:54,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 02:07:54,413 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:54,414 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:54,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-28 02:07:54,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 10 proven. 249 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:07:55,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 4 proven. 249 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:07:57,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645567295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:57,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:57,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29, 28] total 73 [2024-11-28 02:07:57,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688604684] [2024-11-28 02:07:57,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:57,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-28 02:07:57,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:57,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-28 02:07:57,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4782, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 02:07:57,984 INFO L87 Difference]: Start difference. First operand 233 states and 388 transitions. Second operand has 73 states, 73 states have (on average 2.3972602739726026) internal successors, (175), 69 states have internal predecessors, (175), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 02:08:22,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:22,931 INFO L93 Difference]: Finished difference Result 1024 states and 1745 transitions. [2024-11-28 02:08:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2024-11-28 02:08:22,932 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.3972602739726026) internal successors, (175), 69 states have internal predecessors, (175), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 85 [2024-11-28 02:08:22,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:22,938 INFO L225 Difference]: With dead ends: 1024 [2024-11-28 02:08:22,938 INFO L226 Difference]: Without dead ends: 797 [2024-11-28 02:08:22,946 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11575 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=7095, Invalid=36795, Unknown=0, NotChecked=0, Total=43890 [2024-11-28 02:08:22,947 INFO L435 NwaCegarLoop]: 138 mSDtfsCounter, 4532 mSDsluCounter, 4803 mSDsCounter, 0 mSdLazyCounter, 7927 mSolverCounterSat, 1595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4556 SdHoareTripleChecker+Valid, 4941 SdHoareTripleChecker+Invalid, 9522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1595 IncrementalHoareTripleChecker+Valid, 7927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:22,947 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4556 Valid, 4941 Invalid, 9522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1595 Valid, 7927 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-28 02:08:22,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2024-11-28 02:08:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 257. [2024-11-28 02:08:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 232 states have (on average 1.4439655172413792) internal successors, (335), 234 states have internal predecessors, (335), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 19 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:08:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 436 transitions. [2024-11-28 02:08:23,034 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 436 transitions. Word has length 85 [2024-11-28 02:08:23,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:23,035 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 436 transitions. [2024-11-28 02:08:23,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.3972602739726026) internal successors, (175), 69 states have internal predecessors, (175), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 02:08:23,035 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 436 transitions. [2024-11-28 02:08:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-28 02:08:23,038 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:23,038 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:23,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-28 02:08:23,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:23,242 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:08:23,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash -588961223, now seen corresponding path program 2 times [2024-11-28 02:08:23,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:23,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853539023] [2024-11-28 02:08:23,243 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:08:23,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:23,263 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:08:23,263 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 4 proven. 493 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:08:23,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:23,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853539023] [2024-11-28 02:08:23,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853539023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:23,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665482790] [2024-11-28 02:08:23,954 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:08:23,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:23,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:23,956 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:23,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 02:08:24,041 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:08:24,041 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:24,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 02:08:24,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 25 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:08:24,454 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 4 proven. 493 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:08:25,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665482790] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:25,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:25,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2024-11-28 02:08:25,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968725039] [2024-11-28 02:08:25,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:25,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-28 02:08:25,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:25,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-28 02:08:25,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=3556, Unknown=0, NotChecked=0, Total=5402 [2024-11-28 02:08:25,741 INFO L87 Difference]: Start difference. First operand 257 states and 436 transitions. Second operand has 74 states, 74 states have (on average 2.4864864864864864) internal successors, (184), 74 states have internal predecessors, (184), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 02:08:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:26,318 INFO L93 Difference]: Finished difference Result 826 states and 1260 transitions. [2024-11-28 02:08:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-28 02:08:26,321 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.4864864864864864) internal successors, (184), 74 states have internal predecessors, (184), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 92 [2024-11-28 02:08:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:26,326 INFO L225 Difference]: With dead ends: 826 [2024-11-28 02:08:26,326 INFO L226 Difference]: Without dead ends: 607 [2024-11-28 02:08:26,328 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1917, Invalid=3633, Unknown=0, NotChecked=0, Total=5550 [2024-11-28 02:08:26,329 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 1738 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1738 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:26,329 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1738 Valid, 690 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:08:26,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2024-11-28 02:08:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 282. [2024-11-28 02:08:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 257 states have (on average 1.4980544747081712) internal successors, (385), 259 states have internal predecessors, (385), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 19 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:08:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 486 transitions. [2024-11-28 02:08:26,393 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 486 transitions. Word has length 92 [2024-11-28 02:08:26,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:26,394 INFO L471 AbstractCegarLoop]: Abstraction has 282 states and 486 transitions. [2024-11-28 02:08:26,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.4864864864864864) internal successors, (184), 74 states have internal predecessors, (184), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 02:08:26,395 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 486 transitions. [2024-11-28 02:08:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-28 02:08:26,396 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:26,397 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:26,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 02:08:26,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:26,597 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:08:26,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:26,598 INFO L85 PathProgramCache]: Analyzing trace with hash -403071282, now seen corresponding path program 1 times [2024-11-28 02:08:26,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:26,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268370205] [2024-11-28 02:08:26,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:26,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2024-11-28 02:08:27,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:27,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268370205] [2024-11-28 02:08:27,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268370205] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:27,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:08:27,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:08:27,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631137577] [2024-11-28 02:08:27,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:27,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:08:27,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:27,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:08:27,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:08:27,170 INFO L87 Difference]: Start difference. First operand 282 states and 486 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:08:27,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:27,378 INFO L93 Difference]: Finished difference Result 339 states and 562 transitions. [2024-11-28 02:08:27,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:08:27,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 102 [2024-11-28 02:08:27,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:27,381 INFO L225 Difference]: With dead ends: 339 [2024-11-28 02:08:27,381 INFO L226 Difference]: Without dead ends: 327 [2024-11-28 02:08:27,382 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:08:27,382 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 22 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:27,382 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 639 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:27,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-28 02:08:27,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 300. [2024-11-28 02:08:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 275 states have (on average 1.48) internal successors, (407), 276 states have internal predecessors, (407), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:08:27,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 508 transitions. [2024-11-28 02:08:27,441 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 508 transitions. Word has length 102 [2024-11-28 02:08:27,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:27,441 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 508 transitions. [2024-11-28 02:08:27,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:08:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 508 transitions. [2024-11-28 02:08:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-28 02:08:27,443 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:27,443 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:27,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-28 02:08:27,444 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:08:27,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:27,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1103691216, now seen corresponding path program 1 times [2024-11-28 02:08:27,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:27,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913046799] [2024-11-28 02:08:27,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:27,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 288 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:08:28,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:28,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913046799] [2024-11-28 02:08:28,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913046799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:28,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7362909] [2024-11-28 02:08:28,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:28,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:28,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:28,516 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:28,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 02:08:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:28,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 02:08:28,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2024-11-28 02:08:29,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2024-11-28 02:08:29,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7362909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:29,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:29,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 11] total 39 [2024-11-28 02:08:29,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298755423] [2024-11-28 02:08:29,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:29,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 02:08:29,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:29,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 02:08:29,858 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 02:08:29,859 INFO L87 Difference]: Start difference. First operand 300 states and 508 transitions. Second operand has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 37 states have internal predecessors, (121), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-28 02:08:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:35,412 INFO L93 Difference]: Finished difference Result 657 states and 1105 transitions. [2024-11-28 02:08:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-28 02:08:35,413 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 37 states have internal predecessors, (121), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 103 [2024-11-28 02:08:35,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:35,416 INFO L225 Difference]: With dead ends: 657 [2024-11-28 02:08:35,416 INFO L226 Difference]: Without dead ends: 385 [2024-11-28 02:08:35,419 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=824, Invalid=9478, Unknown=0, NotChecked=0, Total=10302 [2024-11-28 02:08:35,420 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 466 mSDsluCounter, 2215 mSDsCounter, 0 mSdLazyCounter, 2663 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 2794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:35,420 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 2294 Invalid, 2794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2663 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 02:08:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-11-28 02:08:35,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 289. [2024-11-28 02:08:35,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.4886363636363635) internal successors, (393), 265 states have internal predecessors, (393), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:08:35,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 494 transitions. [2024-11-28 02:08:35,479 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 494 transitions. Word has length 103 [2024-11-28 02:08:35,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:35,480 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 494 transitions. [2024-11-28 02:08:35,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 37 states have internal predecessors, (121), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-28 02:08:35,480 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 494 transitions. [2024-11-28 02:08:35,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-28 02:08:35,482 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:35,482 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:35,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-28 02:08:35,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:35,683 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:08:35,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:35,683 INFO L85 PathProgramCache]: Analyzing trace with hash 925196777, now seen corresponding path program 1 times [2024-11-28 02:08:35,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:35,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202860064] [2024-11-28 02:08:35,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:35,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 322 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:08:36,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:36,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202860064] [2024-11-28 02:08:36,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202860064] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:36,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832720356] [2024-11-28 02:08:36,345 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:36,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:36,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:36,347 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:36,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 02:08:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:36,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 02:08:36,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 32 proven. 306 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:08:37,132 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 322 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:08:38,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832720356] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:38,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:38,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 61 [2024-11-28 02:08:38,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681879179] [2024-11-28 02:08:38,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:38,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-28 02:08:38,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:38,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-28 02:08:38,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2024-11-28 02:08:38,491 INFO L87 Difference]: Start difference. First operand 289 states and 494 transitions. Second operand has 61 states, 61 states have (on average 3.180327868852459) internal successors, (194), 61 states have internal predecessors, (194), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:08:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:45,621 INFO L93 Difference]: Finished difference Result 842 states and 1341 transitions. [2024-11-28 02:08:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 02:08:45,622 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.180327868852459) internal successors, (194), 61 states have internal predecessors, (194), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 104 [2024-11-28 02:08:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:45,626 INFO L225 Difference]: With dead ends: 842 [2024-11-28 02:08:45,626 INFO L226 Difference]: Without dead ends: 572 [2024-11-28 02:08:45,627 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=2069, Invalid=4093, Unknown=0, NotChecked=0, Total=6162 [2024-11-28 02:08:45,628 INFO L435 NwaCegarLoop]: 190 mSDtfsCounter, 1506 mSDsluCounter, 4934 mSDsCounter, 0 mSdLazyCounter, 3703 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 5124 SdHoareTripleChecker+Invalid, 3781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 3703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:45,628 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1506 Valid, 5124 Invalid, 3781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 3703 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 02:08:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2024-11-28 02:08:45,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 294. [2024-11-28 02:08:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 269 states have (on average 1.483271375464684) internal successors, (399), 270 states have internal predecessors, (399), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:08:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 500 transitions. [2024-11-28 02:08:45,711 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 500 transitions. Word has length 104 [2024-11-28 02:08:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:45,711 INFO L471 AbstractCegarLoop]: Abstraction has 294 states and 500 transitions. [2024-11-28 02:08:45,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.180327868852459) internal successors, (194), 61 states have internal predecessors, (194), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:08:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 500 transitions. [2024-11-28 02:08:45,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-28 02:08:45,714 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:45,714 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:45,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 02:08:45,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 02:08:45,915 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:08:45,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:45,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1113303751, now seen corresponding path program 1 times [2024-11-28 02:08:45,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:45,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32146103] [2024-11-28 02:08:45,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:45,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 322 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:08:47,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:47,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32146103] [2024-11-28 02:08:47,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32146103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:47,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973340020] [2024-11-28 02:08:47,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:47,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:47,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:47,008 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:47,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 02:08:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:47,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 02:08:47,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2024-11-28 02:08:47,358 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:08:47,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973340020] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:47,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:08:47,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [23] total 29 [2024-11-28 02:08:47,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653965412] [2024-11-28 02:08:47,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:47,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 02:08:47,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:47,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 02:08:47,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-11-28 02:08:47,359 INFO L87 Difference]: Start difference. First operand 294 states and 500 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:08:47,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:47,473 INFO L93 Difference]: Finished difference Result 345 states and 562 transitions. [2024-11-28 02:08:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:08:47,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 105 [2024-11-28 02:08:47,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:47,477 INFO L225 Difference]: With dead ends: 345 [2024-11-28 02:08:47,477 INFO L226 Difference]: Without dead ends: 298 [2024-11-28 02:08:47,477 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-11-28 02:08:47,478 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 8 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:47,478 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 594 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:47,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-28 02:08:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 296. [2024-11-28 02:08:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 271 states have (on average 1.4797047970479704) internal successors, (401), 272 states have internal predecessors, (401), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:08:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 502 transitions. [2024-11-28 02:08:47,547 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 502 transitions. Word has length 105 [2024-11-28 02:08:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:47,549 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 502 transitions. [2024-11-28 02:08:47,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:08:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 502 transitions. [2024-11-28 02:08:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-28 02:08:47,551 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:47,551 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:47,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 02:08:47,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 02:08:47,752 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:08:47,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:47,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1632337640, now seen corresponding path program 1 times [2024-11-28 02:08:47,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:47,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047896942] [2024-11-28 02:08:47,753 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:47,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 322 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:08:48,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:48,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047896942] [2024-11-28 02:08:48,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047896942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:48,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924120018] [2024-11-28 02:08:48,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:48,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:48,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:48,783 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:48,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 02:08:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:48,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:08:48,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2024-11-28 02:08:49,020 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:08:49,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924120018] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:49,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:08:49,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [23] total 28 [2024-11-28 02:08:49,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912855531] [2024-11-28 02:08:49,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:49,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:08:49,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:49,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:08:49,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:08:49,021 INFO L87 Difference]: Start difference. First operand 296 states and 502 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:08:49,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:49,119 INFO L93 Difference]: Finished difference Result 334 states and 548 transitions. [2024-11-28 02:08:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:08:49,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 106 [2024-11-28 02:08:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:49,121 INFO L225 Difference]: With dead ends: 334 [2024-11-28 02:08:49,121 INFO L226 Difference]: Without dead ends: 298 [2024-11-28 02:08:49,121 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:08:49,122 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 5 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:49,122 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 502 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:49,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-28 02:08:49,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 296. [2024-11-28 02:08:49,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 271 states have (on average 1.4760147601476015) internal successors, (400), 272 states have internal predecessors, (400), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:08:49,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 501 transitions. [2024-11-28 02:08:49,182 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 501 transitions. Word has length 106 [2024-11-28 02:08:49,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:49,183 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 501 transitions. [2024-11-28 02:08:49,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:08:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 501 transitions. [2024-11-28 02:08:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-28 02:08:49,184 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:49,185 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:49,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 02:08:49,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 02:08:49,385 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:08:49,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:49,385 INFO L85 PathProgramCache]: Analyzing trace with hash -153364772, now seen corresponding path program 1 times [2024-11-28 02:08:49,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:49,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882953135] [2024-11-28 02:08:49,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:49,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 322 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:08:50,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:50,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882953135] [2024-11-28 02:08:50,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882953135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:50,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000567178] [2024-11-28 02:08:50,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:50,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:50,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:50,303 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:50,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 02:08:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:50,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 02:08:50,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2024-11-28 02:08:50,937 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:08:50,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000567178] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:08:50,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:08:50,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [23] total 31 [2024-11-28 02:08:50,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224800] [2024-11-28 02:08:50,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:08:50,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:08:50,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:50,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:08:50,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2024-11-28 02:08:50,939 INFO L87 Difference]: Start difference. First operand 296 states and 501 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:08:51,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:08:51,086 INFO L93 Difference]: Finished difference Result 330 states and 544 transitions. [2024-11-28 02:08:51,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:08:51,087 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 107 [2024-11-28 02:08:51,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:08:51,089 INFO L225 Difference]: With dead ends: 330 [2024-11-28 02:08:51,089 INFO L226 Difference]: Without dead ends: 318 [2024-11-28 02:08:51,089 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2024-11-28 02:08:51,090 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 27 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:08:51,090 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 794 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:08:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2024-11-28 02:08:51,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 300. [2024-11-28 02:08:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 275 states have (on average 1.4727272727272727) internal successors, (405), 276 states have internal predecessors, (405), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2024-11-28 02:08:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 506 transitions. [2024-11-28 02:08:51,163 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 506 transitions. Word has length 107 [2024-11-28 02:08:51,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:08:51,163 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 506 transitions. [2024-11-28 02:08:51,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:08:51,164 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 506 transitions. [2024-11-28 02:08:51,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-28 02:08:51,165 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:08:51,165 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:51,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 02:08:51,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 02:08:51,366 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:08:51,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:51,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1032274542, now seen corresponding path program 1 times [2024-11-28 02:08:51,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:51,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866742095] [2024-11-28 02:08:51,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:51,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 4 proven. 328 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 02:08:52,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:52,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866742095] [2024-11-28 02:08:52,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866742095] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:52,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815882990] [2024-11-28 02:08:52,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:08:52,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:52,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:52,306 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:52,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 02:08:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:08:52,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-28 02:08:52,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 12 proven. 324 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 02:08:56,867 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:03,998 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 29 proven. 323 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:09:03,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815882990] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:03,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:03,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 39, 44] total 102 [2024-11-28 02:09:03,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895676025] [2024-11-28 02:09:03,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:03,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2024-11-28 02:09:03,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:04,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2024-11-28 02:09:04,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=9676, Unknown=0, NotChecked=0, Total=10302 [2024-11-28 02:09:04,002 INFO L87 Difference]: Start difference. First operand 300 states and 506 transitions. Second operand has 102 states, 98 states have (on average 2.479591836734694) internal successors, (243), 96 states have internal predecessors, (243), 7 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 02:11:50,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:11:50,417 INFO L93 Difference]: Finished difference Result 1186 states and 2081 transitions. [2024-11-28 02:11:50,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2024-11-28 02:11:50,421 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 98 states have (on average 2.479591836734694) internal successors, (243), 96 states have internal predecessors, (243), 7 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 108 [2024-11-28 02:11:50,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:11:50,430 INFO L225 Difference]: With dead ends: 1186 [2024-11-28 02:11:50,430 INFO L226 Difference]: Without dead ends: 910 [2024-11-28 02:11:50,441 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16365 ImplicationChecksByTransitivity, 156.2s TimeCoverageRelationStatistics Valid=6934, Invalid=65696, Unknown=0, NotChecked=0, Total=72630 [2024-11-28 02:11:50,441 INFO L435 NwaCegarLoop]: 120 mSDtfsCounter, 4296 mSDsluCounter, 6270 mSDsCounter, 0 mSdLazyCounter, 18474 mSolverCounterSat, 1411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4320 SdHoareTripleChecker+Valid, 6390 SdHoareTripleChecker+Invalid, 19885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1411 IncrementalHoareTripleChecker+Valid, 18474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:11:50,442 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4320 Valid, 6390 Invalid, 19885 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1411 Valid, 18474 Invalid, 0 Unknown, 0 Unchecked, 18.5s Time] [2024-11-28 02:11:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2024-11-28 02:11:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 333. [2024-11-28 02:11:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 302 states have (on average 1.4503311258278146) internal successors, (438), 303 states have internal predecessors, (438), 19 states have call successors, (19), 3 states have call predecessors, (19), 11 states have return successors, (144), 26 states have call predecessors, (144), 18 states have call successors, (144) [2024-11-28 02:11:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 601 transitions. [2024-11-28 02:11:50,550 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 601 transitions. Word has length 108 [2024-11-28 02:11:50,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:11:50,550 INFO L471 AbstractCegarLoop]: Abstraction has 333 states and 601 transitions. [2024-11-28 02:11:50,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 98 states have (on average 2.479591836734694) internal successors, (243), 96 states have internal predecessors, (243), 7 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 02:11:50,550 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 601 transitions. [2024-11-28 02:11:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-28 02:11:50,552 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:11:50,552 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:11:50,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-28 02:11:50,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 02:11:50,753 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:11:50,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:11:50,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1924748561, now seen corresponding path program 1 times [2024-11-28 02:11:50,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:11:50,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456025773] [2024-11-28 02:11:50,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:11:50,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:11:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:11:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 4 proven. 364 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 02:11:51,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:11:51,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456025773] [2024-11-28 02:11:51,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456025773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:11:51,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496770249] [2024-11-28 02:11:51,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:11:51,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:11:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:11:51,801 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:11:51,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 02:11:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:11:51,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-28 02:11:51,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:11:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 11 proven. 374 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 02:11:56,594 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:12:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 22 proven. 365 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:12:03,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496770249] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:12:03,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:12:03,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43, 45] total 108 [2024-11-28 02:12:03,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390035398] [2024-11-28 02:12:03,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:12:03,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-11-28 02:12:03,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:12:03,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-11-28 02:12:03,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=10765, Unknown=0, NotChecked=0, Total=11556 [2024-11-28 02:12:03,572 INFO L87 Difference]: Start difference. First operand 333 states and 601 transitions. Second operand has 108 states, 104 states have (on average 2.3846153846153846) internal successors, (248), 102 states have internal predecessors, (248), 7 states have call successors, (11), 2 states have call predecessors, (11), 8 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 02:15:16,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:16,322 INFO L93 Difference]: Finished difference Result 1355 states and 2416 transitions. [2024-11-28 02:15:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2024-11-28 02:15:16,323 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 104 states have (on average 2.3846153846153846) internal successors, (248), 102 states have internal predecessors, (248), 7 states have call successors, (11), 2 states have call predecessors, (11), 8 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 110 [2024-11-28 02:15:16,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:16,328 INFO L225 Difference]: With dead ends: 1355 [2024-11-28 02:15:16,328 INFO L226 Difference]: Without dead ends: 1051 [2024-11-28 02:15:16,335 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23306 ImplicationChecksByTransitivity, 177.0s TimeCoverageRelationStatistics Valid=10211, Invalid=78891, Unknown=0, NotChecked=0, Total=89102 [2024-11-28 02:15:16,336 INFO L435 NwaCegarLoop]: 123 mSDtfsCounter, 6931 mSDsluCounter, 7417 mSDsCounter, 0 mSdLazyCounter, 22763 mSolverCounterSat, 2506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6962 SdHoareTripleChecker+Valid, 7540 SdHoareTripleChecker+Invalid, 25269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2506 IncrementalHoareTripleChecker+Valid, 22763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:16,336 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6962 Valid, 7540 Invalid, 25269 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2506 Valid, 22763 Invalid, 0 Unknown, 0 Unchecked, 24.1s Time] [2024-11-28 02:15:16,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2024-11-28 02:15:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 357. [2024-11-28 02:15:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 321 states have (on average 1.4361370716510904) internal successors, (461), 322 states have internal predecessors, (461), 22 states have call successors, (22), 3 states have call predecessors, (22), 13 states have return successors, (208), 31 states have call predecessors, (208), 21 states have call successors, (208) [2024-11-28 02:15:16,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 691 transitions. [2024-11-28 02:15:16,455 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 691 transitions. Word has length 110 [2024-11-28 02:15:16,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:16,455 INFO L471 AbstractCegarLoop]: Abstraction has 357 states and 691 transitions. [2024-11-28 02:15:16,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 104 states have (on average 2.3846153846153846) internal successors, (248), 102 states have internal predecessors, (248), 7 states have call successors, (11), 2 states have call predecessors, (11), 8 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 02:15:16,456 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 691 transitions. [2024-11-28 02:15:16,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-28 02:15:16,457 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:16,458 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:16,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 02:15:16,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:16,658 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:15:16,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:16,659 INFO L85 PathProgramCache]: Analyzing trace with hash 502473121, now seen corresponding path program 1 times [2024-11-28 02:15:16,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:15:16,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478960873] [2024-11-28 02:15:16,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:15:16,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:15:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 4 proven. 396 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:15:17,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:15:17,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478960873] [2024-11-28 02:15:17,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478960873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:17,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946376098] [2024-11-28 02:15:17,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:15:17,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:17,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:17,772 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:17,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 02:15:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:17,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-28 02:15:17,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 10 proven. 396 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 02:15:20,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 10 proven. 396 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 02:15:24,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946376098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:24,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:15:24,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 38, 38] total 96 [2024-11-28 02:15:24,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437529060] [2024-11-28 02:15:24,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:24,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-28 02:15:24,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:15:24,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-28 02:15:24,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=8335, Unknown=0, NotChecked=0, Total=9120 [2024-11-28 02:15:24,260 INFO L87 Difference]: Start difference. First operand 357 states and 691 transitions. Second operand has 96 states, 96 states have (on average 2.4895833333333335) internal successors, (239), 92 states have internal predecessors, (239), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 02:15:46,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-28 02:15:46,353 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-28 02:15:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-28 02:15:46,355 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2826 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=2874, Invalid=19476, Unknown=0, NotChecked=0, Total=22350 [2024-11-28 02:15:46,355 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 1600 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 3864 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 4545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 3864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:46,355 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1600 Valid, 484 Invalid, 4545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 3864 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-28 02:15:46,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 02:15:46,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:46,557 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:192) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:283) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:275) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 54 more [2024-11-28 02:15:46,565 INFO L158 Benchmark]: Toolchain (without parser) took 530749.36ms. Allocated memory was 117.4MB in the beginning and 385.9MB in the end (delta: 268.4MB). Free memory was 92.3MB in the beginning and 257.3MB in the end (delta: -165.0MB). Peak memory consumption was 273.2MB. Max. memory is 16.1GB. [2024-11-28 02:15:46,565 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 117.4MB. Free memory is still 72.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:15:46,565 INFO L158 Benchmark]: CACSL2BoogieTranslator took 408.81ms. Allocated memory is still 117.4MB. Free memory was 92.3MB in the beginning and 78.6MB in the end (delta: 13.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 02:15:46,565 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.61ms. Allocated memory is still 117.4MB. Free memory was 78.6MB in the beginning and 76.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:15:46,566 INFO L158 Benchmark]: Boogie Preprocessor took 50.80ms. Allocated memory is still 117.4MB. Free memory was 76.9MB in the beginning and 75.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:15:46,566 INFO L158 Benchmark]: RCFGBuilder took 627.73ms. Allocated memory is still 117.4MB. Free memory was 75.2MB in the beginning and 55.7MB in the end (delta: 19.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 02:15:46,566 INFO L158 Benchmark]: TraceAbstraction took 529617.18ms. Allocated memory was 117.4MB in the beginning and 385.9MB in the end (delta: 268.4MB). Free memory was 55.2MB in the beginning and 257.3MB in the end (delta: -202.1MB). Peak memory consumption was 239.7MB. Max. memory is 16.1GB. [2024-11-28 02:15:46,567 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 117.4MB. Free memory is still 72.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 408.81ms. Allocated memory is still 117.4MB. Free memory was 92.3MB in the beginning and 78.6MB in the end (delta: 13.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.61ms. Allocated memory is still 117.4MB. Free memory was 78.6MB in the beginning and 76.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 50.80ms. Allocated memory is still 117.4MB. Free memory was 76.9MB in the beginning and 75.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 627.73ms. Allocated memory is still 117.4MB. Free memory was 75.2MB in the beginning and 55.7MB in the end (delta: 19.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 529617.18ms. Allocated memory was 117.4MB in the beginning and 385.9MB in the end (delta: 268.4MB). Free memory was 55.2MB in the beginning and 257.3MB in the end (delta: -202.1MB). Peak memory consumption was 239.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:15:49,077 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:15:49,224 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-28 02:15:49,238 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:15:49,238 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:15:49,264 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:15:49,265 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:15:49,265 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:15:49,265 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:15:49,265 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:15:49,266 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:15:49,266 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:15:49,266 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:15:49,266 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:15:49,266 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:15:49,267 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:15:49,267 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 02:15:49,267 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:15:49,267 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:15:49,267 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:15:49,267 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 02:15:49,268 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:15:49,268 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 02:15:49,268 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:15:49,268 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 02:15:49,268 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 02:15:49,268 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:15:49,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 02:15:49,269 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:15:49,269 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:15:49,269 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:15:49,269 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:15:49,269 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:15:49,269 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:15:49,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:15:49,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:15:49,270 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:15:49,270 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:15:49,270 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:15:49,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:15:49,271 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:15:49,271 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:15:49,271 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 02:15:49,271 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 02:15:49,271 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 02:15:49,271 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 02:15:49,271 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:15:49,271 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:15:49,271 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:15:49,271 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:15:49,271 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_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2024-11-28 02:15:49,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:15:49,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:15:49,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:15:49,619 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:15:49,620 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:15:49,622 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2024-11-28 02:15:52,647 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/data/0a1b25f3b/0ef190c5dcc94f2c8f19c27d86bd33e4/FLAGb71ef234a [2024-11-28 02:15:52,952 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:15:52,953 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2024-11-28 02:15:52,965 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/data/0a1b25f3b/0ef190c5dcc94f2c8f19c27d86bd33e4/FLAGb71ef234a [2024-11-28 02:15:53,227 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/data/0a1b25f3b/0ef190c5dcc94f2c8f19c27d86bd33e4 [2024-11-28 02:15:53,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:15:53,231 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:15:53,232 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:15:53,232 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:15:53,236 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:15:53,237 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,238 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@133a7471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53, skipping insertion in model container [2024-11-28 02:15:53,238 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,259 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:15:53,422 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_eab45eaa-f301-4875-a7d5-3d81373de590/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2024-11-28 02:15:53,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:15:53,489 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:15:53,501 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_eab45eaa-f301-4875-a7d5-3d81373de590/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2024-11-28 02:15:53,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:15:53,548 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:15:53,549 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53 WrapperNode [2024-11-28 02:15:53,549 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:15:53,550 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:15:53,552 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:15:53,552 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:15:53,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,567 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,588 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 113 [2024-11-28 02:15:53,589 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:15:53,590 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:15:53,590 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:15:53,590 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:15:53,599 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,599 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,602 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,614 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]. [2024-11-28 02:15:53,615 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,615 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,622 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,623 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,627 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,629 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,630 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,633 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:15:53,634 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:15:53,634 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:15:53,634 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:15:53,636 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53" (1/1) ... [2024-11-28 02:15:53,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:15:53,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:53,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:15:53,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:15:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:15:53,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 02:15:53,727 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-28 02:15:53,728 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-28 02:15:53,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:15:53,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:15:53,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 02:15:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 02:15:53,829 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:15:53,831 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:15:54,273 INFO L? ?]: Removed 48 outVars from TransFormulas that were not future-live. [2024-11-28 02:15:54,274 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:15:54,287 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:15:54,287 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 02:15:54,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:15:54 BoogieIcfgContainer [2024-11-28 02:15:54,288 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:15:54,291 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:15:54,291 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:15:54,302 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:15:54,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:15:53" (1/3) ... [2024-11-28 02:15:54,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11939c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:15:54, skipping insertion in model container [2024-11-28 02:15:54,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:15:53" (2/3) ... [2024-11-28 02:15:54,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11939c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:15:54, skipping insertion in model container [2024-11-28 02:15:54,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:15:54" (3/3) ... [2024-11-28 02:15:54,307 INFO L128 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2024-11-28 02:15:54,324 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:15:54,326 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_3a.c.cil.c that has 3 procedures, 49 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-28 02:15:54,391 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:15:54,423 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;@1c223e7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:15:54,425 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 02:15:54,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 40 states have (on average 1.6) internal successors, (64), 42 states have internal predecessors, (64), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 02:15:54,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 02:15:54,442 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:54,443 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:54,444 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:15:54,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash -410046507, now seen corresponding path program 1 times [2024-11-28 02:15:54,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:15:54,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941645703] [2024-11-28 02:15:54,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:15:54,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:54,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:54,473 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:54,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:15:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:54,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:15:54,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:54,752 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:15:54,753 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:15:54,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941645703] [2024-11-28 02:15:54,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941645703] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:15:54,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:15:54,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:15:54,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977494] [2024-11-28 02:15:54,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:15:54,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:15:54,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:15:54,793 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:15:54,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:15:54,796 INFO L87 Difference]: Start difference. First operand has 49 states, 40 states have (on average 1.6) internal successors, (64), 42 states have internal predecessors, (64), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:15:55,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:55,012 INFO L93 Difference]: Finished difference Result 107 states and 173 transitions. [2024-11-28 02:15:55,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:15:55,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2024-11-28 02:15:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:55,027 INFO L225 Difference]: With dead ends: 107 [2024-11-28 02:15:55,027 INFO L226 Difference]: Without dead ends: 55 [2024-11-28 02:15:55,031 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:15:55,036 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 10 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:55,037 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:15:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-28 02:15:55,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2024-11-28 02:15:55,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 02:15:55,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2024-11-28 02:15:55,093 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 41 [2024-11-28 02:15:55,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:55,095 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2024-11-28 02:15:55,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:15:55,096 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2024-11-28 02:15:55,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 02:15:55,099 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:55,100 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:55,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 02:15:55,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:55,306 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:15:55,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:55,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1100990440, now seen corresponding path program 1 times [2024-11-28 02:15:55,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:15:55,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798946380] [2024-11-28 02:15:55,307 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:15:55,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:55,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:55,312 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:55,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:15:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:55,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-28 02:15:55,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:15:55,465 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:15:55,465 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:15:55,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798946380] [2024-11-28 02:15:55,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798946380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:15:55,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:15:55,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:15:55,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958382163] [2024-11-28 02:15:55,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:15:55,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:15:55,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:15:55,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:15:55,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:15:55,475 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:15:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:55,495 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2024-11-28 02:15:55,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:15:55,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2024-11-28 02:15:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:55,499 INFO L225 Difference]: With dead ends: 57 [2024-11-28 02:15:55,499 INFO L226 Difference]: Without dead ends: 48 [2024-11-28 02:15:55,500 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:15:55,500 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:55,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:15:55,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-28 02:15:55,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-28 02:15:55,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.4) internal successors, (56), 40 states have internal predecessors, (56), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 02:15:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2024-11-28 02:15:55,518 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 43 [2024-11-28 02:15:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:55,519 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2024-11-28 02:15:55,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:15:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2024-11-28 02:15:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 02:15:55,521 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:55,522 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:55,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 02:15:55,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:55,727 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:15:55,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1996088242, now seen corresponding path program 1 times [2024-11-28 02:15:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:15:55,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061856965] [2024-11-28 02:15:55,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:15:55,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:55,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:55,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:55,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:15:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:55,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:15:55,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:15:55,850 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:15:55,850 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:15:55,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061856965] [2024-11-28 02:15:55,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061856965] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:15:55,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:15:55,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:15:55,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945396365] [2024-11-28 02:15:55,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:15:55,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:15:55,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:15:55,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:15:55,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:15:55,855 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:15:55,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:55,888 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2024-11-28 02:15:55,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:15:55,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2024-11-28 02:15:55,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:55,890 INFO L225 Difference]: With dead ends: 58 [2024-11-28 02:15:55,890 INFO L226 Difference]: Without dead ends: 48 [2024-11-28 02:15:55,891 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:15:55,892 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:55,892 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 175 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:15:55,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-28 02:15:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-28 02:15:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 02:15:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2024-11-28 02:15:55,909 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 45 [2024-11-28 02:15:55,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:55,910 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2024-11-28 02:15:55,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:15:55,910 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2024-11-28 02:15:55,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 02:15:55,912 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:55,912 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:55,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 02:15:56,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:56,113 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:15:56,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:56,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1489532428, now seen corresponding path program 1 times [2024-11-28 02:15:56,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:15:56,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274190693] [2024-11-28 02:15:56,115 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:15:56,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:56,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:56,118 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:56,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:15:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:56,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:15:56,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:15:56,290 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:15:56,290 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:15:56,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274190693] [2024-11-28 02:15:56,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274190693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:15:56,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:15:56,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:15:56,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385251383] [2024-11-28 02:15:56,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:15:56,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:15:56,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:15:56,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:15:56,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:15:56,293 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:15:56,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:56,395 INFO L93 Difference]: Finished difference Result 96 states and 135 transitions. [2024-11-28 02:15:56,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:15:56,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2024-11-28 02:15:56,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:56,397 INFO L225 Difference]: With dead ends: 96 [2024-11-28 02:15:56,397 INFO L226 Difference]: Without dead ends: 55 [2024-11-28 02:15:56,398 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:15:56,399 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:56,399 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 145 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:15:56,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-28 02:15:56,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2024-11-28 02:15:56,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.372093023255814) internal successors, (59), 44 states have internal predecessors, (59), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 02:15:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 72 transitions. [2024-11-28 02:15:56,407 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 72 transitions. Word has length 45 [2024-11-28 02:15:56,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:56,408 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 72 transitions. [2024-11-28 02:15:56,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:15:56,408 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 72 transitions. [2024-11-28 02:15:56,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 02:15:56,409 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:56,410 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:56,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:15:56,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:56,614 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:15:56,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:56,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2124194881, now seen corresponding path program 1 times [2024-11-28 02:15:56,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:15:56,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607864049] [2024-11-28 02:15:56,616 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:15:56,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:56,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:56,618 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:56,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:15:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:56,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:15:56,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:15:56,992 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:15:57,281 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:15:57,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607864049] [2024-11-28 02:15:57,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607864049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:57,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:15:57,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-11-28 02:15:57,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126558474] [2024-11-28 02:15:57,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:57,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:15:57,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:15:57,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:15:57,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:15:57,283 INFO L87 Difference]: Start difference. First operand 52 states and 72 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:15:57,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:57,548 INFO L93 Difference]: Finished difference Result 98 states and 147 transitions. [2024-11-28 02:15:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:15:57,552 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-11-28 02:15:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:57,553 INFO L225 Difference]: With dead ends: 98 [2024-11-28 02:15:57,553 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 02:15:57,554 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:15:57,554 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 32 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:57,555 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1167 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:15:57,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 02:15:57,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2024-11-28 02:15:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 52 states have internal predecessors, (65), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2024-11-28 02:15:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 93 transitions. [2024-11-28 02:15:57,574 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 93 transitions. Word has length 46 [2024-11-28 02:15:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:57,574 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 93 transitions. [2024-11-28 02:15:57,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:15:57,575 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 93 transitions. [2024-11-28 02:15:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 02:15:57,576 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:57,577 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:57,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 02:15:57,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:57,777 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:15:57,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:57,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1418880131, now seen corresponding path program 1 times [2024-11-28 02:15:57,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:15:57,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012609227] [2024-11-28 02:15:57,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:15:57,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:57,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:57,783 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:57,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:15:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:57,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 02:15:57,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:15:57,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:15:58,060 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:15:58,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012609227] [2024-11-28 02:15:58,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012609227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:15:58,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:15:58,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-28 02:15:58,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564663018] [2024-11-28 02:15:58,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:15:58,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:15:58,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:15:58,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:15:58,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:15:58,065 INFO L87 Difference]: Start difference. First operand 62 states and 93 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:15:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:58,144 INFO L93 Difference]: Finished difference Result 88 states and 134 transitions. [2024-11-28 02:15:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:15:58,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-11-28 02:15:58,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:58,146 INFO L225 Difference]: With dead ends: 88 [2024-11-28 02:15:58,150 INFO L226 Difference]: Without dead ends: 83 [2024-11-28 02:15:58,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:15:58,151 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 14 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:58,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 267 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:15:58,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-28 02:15:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2024-11-28 02:15:58,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 67 states have (on average 1.3432835820895523) internal successors, (90), 69 states have internal predecessors, (90), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-28 02:15:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 127 transitions. [2024-11-28 02:15:58,178 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 127 transitions. Word has length 46 [2024-11-28 02:15:58,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:58,178 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 127 transitions. [2024-11-28 02:15:58,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:15:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 127 transitions. [2024-11-28 02:15:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 02:15:58,185 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:58,185 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:58,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:15:58,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:58,386 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:15:58,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1217686173, now seen corresponding path program 1 times [2024-11-28 02:15:58,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:15:58,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121062917] [2024-11-28 02:15:58,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:15:58,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:58,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:58,389 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:58,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:15:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:58,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:15:58,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:15:58,546 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:15:58,546 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:15:58,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121062917] [2024-11-28 02:15:58,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121062917] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:15:58,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:15:58,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:15:58,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031485557] [2024-11-28 02:15:58,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:15:58,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:15:58,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:15:58,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:15:58,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:15:58,552 INFO L87 Difference]: Start difference. First operand 82 states and 127 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:15:58,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:58,617 INFO L93 Difference]: Finished difference Result 123 states and 185 transitions. [2024-11-28 02:15:58,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:15:58,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2024-11-28 02:15:58,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:58,620 INFO L225 Difference]: With dead ends: 123 [2024-11-28 02:15:58,621 INFO L226 Difference]: Without dead ends: 88 [2024-11-28 02:15:58,622 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:15:58,623 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 1 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:58,624 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 276 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:15:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-28 02:15:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-28 02:15:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 73 states have internal predecessors, (96), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (28), 11 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-28 02:15:58,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 133 transitions. [2024-11-28 02:15:58,649 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 133 transitions. Word has length 48 [2024-11-28 02:15:58,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:58,649 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 133 transitions. [2024-11-28 02:15:58,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:15:58,649 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 133 transitions. [2024-11-28 02:15:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 02:15:58,655 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:58,655 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:58,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:15:58,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:58,856 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:15:58,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:58,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1797417445, now seen corresponding path program 1 times [2024-11-28 02:15:58,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:15:58,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900356957] [2024-11-28 02:15:58,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:15:58,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:58,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:58,861 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:58,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:15:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:58,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:15:58,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:15:58,992 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:15:58,992 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:15:58,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900356957] [2024-11-28 02:15:58,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900356957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:15:58,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:15:58,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:15:58,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995689710] [2024-11-28 02:15:58,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:15:58,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:15:58,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:15:58,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:15:58,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:15:58,995 INFO L87 Difference]: Start difference. First operand 88 states and 133 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:15:59,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:59,057 INFO L93 Difference]: Finished difference Result 109 states and 155 transitions. [2024-11-28 02:15:59,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:15:59,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2024-11-28 02:15:59,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:59,059 INFO L225 Difference]: With dead ends: 109 [2024-11-28 02:15:59,059 INFO L226 Difference]: Without dead ends: 103 [2024-11-28 02:15:59,059 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:15:59,060 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 0 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:59,060 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 210 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:15:59,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-28 02:15:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-11-28 02:15:59,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 88 states have (on average 1.2727272727272727) internal successors, (112), 88 states have internal predecessors, (112), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (28), 11 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-28 02:15:59,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 149 transitions. [2024-11-28 02:15:59,083 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 149 transitions. Word has length 48 [2024-11-28 02:15:59,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:59,083 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 149 transitions. [2024-11-28 02:15:59,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:15:59,083 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 149 transitions. [2024-11-28 02:15:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 02:15:59,085 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:59,085 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:59,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 02:15:59,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:59,289 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:15:59,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:59,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1854675747, now seen corresponding path program 1 times [2024-11-28 02:15:59,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:15:59,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954563995] [2024-11-28 02:15:59,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:15:59,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:59,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:59,294 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:59,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:15:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:59,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:15:59,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:15:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:15:59,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:15:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 02:15:59,584 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:15:59,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954563995] [2024-11-28 02:15:59,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954563995] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 02:15:59,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:15:59,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2024-11-28 02:15:59,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377846002] [2024-11-28 02:15:59,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:15:59,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:15:59,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:15:59,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:15:59,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:15:59,586 INFO L87 Difference]: Start difference. First operand 103 states and 149 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:15:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:15:59,647 INFO L93 Difference]: Finished difference Result 109 states and 154 transitions. [2024-11-28 02:15:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:15:59,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2024-11-28 02:15:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:15:59,649 INFO L225 Difference]: With dead ends: 109 [2024-11-28 02:15:59,649 INFO L226 Difference]: Without dead ends: 92 [2024-11-28 02:15:59,650 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:15:59,650 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 1 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:15:59,651 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 283 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:15:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-28 02:15:59,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2024-11-28 02:15:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 76 states have (on average 1.263157894736842) internal successors, (96), 77 states have internal predecessors, (96), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2024-11-28 02:15:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 127 transitions. [2024-11-28 02:15:59,661 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 127 transitions. Word has length 48 [2024-11-28 02:15:59,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:15:59,661 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 127 transitions. [2024-11-28 02:15:59,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:15:59,662 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 127 transitions. [2024-11-28 02:15:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 02:15:59,663 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:15:59,663 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:15:59,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 02:15:59,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:59,867 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:15:59,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:15:59,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1364089545, now seen corresponding path program 1 times [2024-11-28 02:15:59,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:15:59,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110368054] [2024-11-28 02:15:59,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:15:59,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:15:59,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:15:59,870 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:15:59,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:15:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:15:59,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 02:15:59,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:16:00,283 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:16:00,783 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:00,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110368054] [2024-11-28 02:16:00,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110368054] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:00,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:00,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2024-11-28 02:16:00,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54178373] [2024-11-28 02:16:00,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:00,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 02:16:00,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:00,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 02:16:00,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-28 02:16:00,786 INFO L87 Difference]: Start difference. First operand 90 states and 127 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:02,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:02,271 INFO L93 Difference]: Finished difference Result 203 states and 331 transitions. [2024-11-28 02:16:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 02:16:02,272 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2024-11-28 02:16:02,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:02,274 INFO L225 Difference]: With dead ends: 203 [2024-11-28 02:16:02,274 INFO L226 Difference]: Without dead ends: 182 [2024-11-28 02:16:02,275 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2024-11-28 02:16:02,276 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 75 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:02,276 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 696 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 02:16:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-28 02:16:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 93. [2024-11-28 02:16:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 80 states have internal predecessors, (101), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2024-11-28 02:16:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2024-11-28 02:16:02,297 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 49 [2024-11-28 02:16:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:02,298 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2024-11-28 02:16:02,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2024-11-28 02:16:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 02:16:02,299 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:02,299 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:02,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:16:02,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:02,500 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:02,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:02,500 INFO L85 PathProgramCache]: Analyzing trace with hash 246402757, now seen corresponding path program 1 times [2024-11-28 02:16:02,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:02,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534691949] [2024-11-28 02:16:02,501 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:16:02,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:02,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:02,505 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:02,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:16:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:02,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:16:02,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:02,644 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:16:02,797 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:02,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534691949] [2024-11-28 02:16:02,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534691949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:02,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:02,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-28 02:16:02,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336405299] [2024-11-28 02:16:02,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:02,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 02:16:02,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:02,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 02:16:02,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:16:02,800 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:16:03,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:03,029 INFO L93 Difference]: Finished difference Result 197 states and 288 transitions. [2024-11-28 02:16:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:16:03,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2024-11-28 02:16:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:03,032 INFO L225 Difference]: With dead ends: 197 [2024-11-28 02:16:03,033 INFO L226 Difference]: Without dead ends: 111 [2024-11-28 02:16:03,034 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:16:03,036 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 16 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:03,036 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 242 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:16:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-28 02:16:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2024-11-28 02:16:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 87 states have (on average 1.3218390804597702) internal successors, (115), 89 states have internal predecessors, (115), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-28 02:16:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 151 transitions. [2024-11-28 02:16:03,064 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 151 transitions. Word has length 50 [2024-11-28 02:16:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:03,064 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 151 transitions. [2024-11-28 02:16:03,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:16:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 151 transitions. [2024-11-28 02:16:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 02:16:03,065 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:03,066 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:03,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 02:16:03,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:03,266 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:03,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:03,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1180946591, now seen corresponding path program 1 times [2024-11-28 02:16:03,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:03,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000441616] [2024-11-28 02:16:03,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:16:03,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:03,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:03,271 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:03,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:16:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:03,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 02:16:03,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:16:03,719 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:16:04,299 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:04,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000441616] [2024-11-28 02:16:04,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000441616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:04,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:04,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-11-28 02:16:04,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309661266] [2024-11-28 02:16:04,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:04,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:16:04,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:04,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:16:04,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:16:04,302 INFO L87 Difference]: Start difference. First operand 102 states and 151 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:05,653 INFO L93 Difference]: Finished difference Result 225 states and 401 transitions. [2024-11-28 02:16:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 02:16:05,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 51 [2024-11-28 02:16:05,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:05,656 INFO L225 Difference]: With dead ends: 225 [2024-11-28 02:16:05,656 INFO L226 Difference]: Without dead ends: 204 [2024-11-28 02:16:05,661 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2024-11-28 02:16:05,662 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 63 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:05,663 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 866 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 02:16:05,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-28 02:16:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 107. [2024-11-28 02:16:05,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 92 states have (on average 1.358695652173913) internal successors, (125), 94 states have internal predecessors, (125), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-28 02:16:05,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 161 transitions. [2024-11-28 02:16:05,699 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 161 transitions. Word has length 51 [2024-11-28 02:16:05,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:05,701 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 161 transitions. [2024-11-28 02:16:05,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:05,701 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 161 transitions. [2024-11-28 02:16:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 02:16:05,703 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:05,703 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:05,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 02:16:05,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:05,903 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:05,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1385572576, now seen corresponding path program 1 times [2024-11-28 02:16:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:05,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929024379] [2024-11-28 02:16:05,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:16:05,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:05,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:05,906 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:05,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:16:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:05,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:16:05,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 02:16:06,043 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 02:16:06,096 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:06,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929024379] [2024-11-28 02:16:06,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929024379] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:06,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:06,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-28 02:16:06,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460662119] [2024-11-28 02:16:06,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:06,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 02:16:06,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:06,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 02:16:06,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:16:06,097 INFO L87 Difference]: Start difference. First operand 107 states and 161 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:16:06,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:06,202 INFO L93 Difference]: Finished difference Result 115 states and 168 transitions. [2024-11-28 02:16:06,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:16:06,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-11-28 02:16:06,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:06,204 INFO L225 Difference]: With dead ends: 115 [2024-11-28 02:16:06,204 INFO L226 Difference]: Without dead ends: 89 [2024-11-28 02:16:06,205 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:16:06,205 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 4 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:06,205 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 378 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:16:06,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-28 02:16:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-11-28 02:16:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 78 states have internal predecessors, (103), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-28 02:16:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 129 transitions. [2024-11-28 02:16:06,233 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 129 transitions. Word has length 52 [2024-11-28 02:16:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:06,233 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 129 transitions. [2024-11-28 02:16:06,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:16:06,234 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 129 transitions. [2024-11-28 02:16:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 02:16:06,235 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:06,235 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:06,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 02:16:06,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:06,439 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:06,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:06,440 INFO L85 PathProgramCache]: Analyzing trace with hash -722113143, now seen corresponding path program 1 times [2024-11-28 02:16:06,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:06,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236408645] [2024-11-28 02:16:06,440 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:16:06,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:06,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:06,442 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:06,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:16:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:06,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:16:06,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 02:16:06,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 02:16:06,701 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:06,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236408645] [2024-11-28 02:16:06,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236408645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:06,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:06,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-28 02:16:06,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195916182] [2024-11-28 02:16:06,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:06,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:16:06,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:06,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:16:06,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:16:06,703 INFO L87 Difference]: Start difference. First operand 89 states and 129 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 02:16:06,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:06,844 INFO L93 Difference]: Finished difference Result 156 states and 226 transitions. [2024-11-28 02:16:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:16:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2024-11-28 02:16:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:06,846 INFO L225 Difference]: With dead ends: 156 [2024-11-28 02:16:06,846 INFO L226 Difference]: Without dead ends: 127 [2024-11-28 02:16:06,846 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:16:06,847 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 29 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:06,847 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 708 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:16:06,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-28 02:16:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2024-11-28 02:16:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 88 states have (on average 1.3863636363636365) internal successors, (122), 91 states have internal predecessors, (122), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (35), 10 states have call predecessors, (35), 8 states have call successors, (35) [2024-11-28 02:16:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 166 transitions. [2024-11-28 02:16:06,861 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 166 transitions. Word has length 52 [2024-11-28 02:16:06,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:06,862 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 166 transitions. [2024-11-28 02:16:06,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 02:16:06,862 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 166 transitions. [2024-11-28 02:16:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 02:16:06,863 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:06,863 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:06,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 02:16:07,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:07,064 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:07,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:07,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1308919157, now seen corresponding path program 2 times [2024-11-28 02:16:07,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:07,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513084641] [2024-11-28 02:16:07,064 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:16:07,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:07,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:07,066 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:07,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:16:07,124 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:16:07,124 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:07,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:16:07,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 02:16:07,175 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:16:07,175 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:07,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513084641] [2024-11-28 02:16:07,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513084641] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:16:07,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:16:07,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:16:07,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865310535] [2024-11-28 02:16:07,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:16:07,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:16:07,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:07,177 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:16:07,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:16:07,177 INFO L87 Difference]: Start difference. First operand 105 states and 166 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:16:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:07,236 INFO L93 Difference]: Finished difference Result 123 states and 186 transitions. [2024-11-28 02:16:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:16:07,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2024-11-28 02:16:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:07,238 INFO L225 Difference]: With dead ends: 123 [2024-11-28 02:16:07,238 INFO L226 Difference]: Without dead ends: 111 [2024-11-28 02:16:07,238 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:16:07,239 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:07,239 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:16:07,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-28 02:16:07,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-28 02:16:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 94 states have (on average 1.372340425531915) internal successors, (129), 95 states have internal predecessors, (129), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (35), 12 states have call predecessors, (35), 8 states have call successors, (35) [2024-11-28 02:16:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 173 transitions. [2024-11-28 02:16:07,260 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 173 transitions. Word has length 52 [2024-11-28 02:16:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:07,261 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 173 transitions. [2024-11-28 02:16:07,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:16:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 173 transitions. [2024-11-28 02:16:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 02:16:07,263 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:07,263 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:07,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 02:16:07,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:07,467 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:07,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:07,468 INFO L85 PathProgramCache]: Analyzing trace with hash -390362425, now seen corresponding path program 3 times [2024-11-28 02:16:07,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:07,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700623527] [2024-11-28 02:16:07,468 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:16:07,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:07,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:07,469 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:07,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:16:07,536 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:16:07,536 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:07,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:16:07,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:16:07,728 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:16:08,039 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:08,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700623527] [2024-11-28 02:16:08,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700623527] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:08,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:08,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-28 02:16:08,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19697837] [2024-11-28 02:16:08,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:08,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:16:08,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:08,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:16:08,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:16:08,042 INFO L87 Difference]: Start difference. First operand 111 states and 173 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:08,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:08,894 INFO L93 Difference]: Finished difference Result 220 states and 361 transitions. [2024-11-28 02:16:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:16:08,895 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2024-11-28 02:16:08,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:08,897 INFO L225 Difference]: With dead ends: 220 [2024-11-28 02:16:08,897 INFO L226 Difference]: Without dead ends: 205 [2024-11-28 02:16:08,898 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:16:08,898 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 94 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:08,899 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 380 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:16:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-28 02:16:08,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 121. [2024-11-28 02:16:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 100 states have (on average 1.35) internal successors, (135), 102 states have internal predecessors, (135), 12 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (57), 15 states have call predecessors, (57), 11 states have call successors, (57) [2024-11-28 02:16:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 204 transitions. [2024-11-28 02:16:08,918 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 204 transitions. Word has length 52 [2024-11-28 02:16:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:08,918 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 204 transitions. [2024-11-28 02:16:08,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 204 transitions. [2024-11-28 02:16:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 02:16:08,920 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:08,921 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:08,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 02:16:09,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:09,121 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:09,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:09,122 INFO L85 PathProgramCache]: Analyzing trace with hash -864329019, now seen corresponding path program 2 times [2024-11-28 02:16:09,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:09,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943428480] [2024-11-28 02:16:09,123 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:16:09,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:09,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:09,125 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:09,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 02:16:09,187 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:16:09,187 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:09,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 02:16:09,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-28 02:16:09,235 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:16:09,236 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:09,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943428480] [2024-11-28 02:16:09,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943428480] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:16:09,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:16:09,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:16:09,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901340834] [2024-11-28 02:16:09,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:16:09,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:16:09,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:09,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:16:09,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:16:09,238 INFO L87 Difference]: Start difference. First operand 121 states and 204 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:16:09,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:09,328 INFO L93 Difference]: Finished difference Result 136 states and 219 transitions. [2024-11-28 02:16:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:16:09,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2024-11-28 02:16:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:09,331 INFO L225 Difference]: With dead ends: 136 [2024-11-28 02:16:09,332 INFO L226 Difference]: Without dead ends: 124 [2024-11-28 02:16:09,332 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:16:09,333 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 3 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:09,333 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 217 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:16:09,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-28 02:16:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2024-11-28 02:16:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 100 states have (on average 1.35) internal successors, (135), 102 states have internal predecessors, (135), 12 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (57), 15 states have call predecessors, (57), 11 states have call successors, (57) [2024-11-28 02:16:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 204 transitions. [2024-11-28 02:16:09,367 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 204 transitions. Word has length 52 [2024-11-28 02:16:09,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:09,367 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 204 transitions. [2024-11-28 02:16:09,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:16:09,367 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 204 transitions. [2024-11-28 02:16:09,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 02:16:09,370 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:09,370 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:09,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 02:16:09,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:09,571 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:09,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:09,571 INFO L85 PathProgramCache]: Analyzing trace with hash 929091044, now seen corresponding path program 1 times [2024-11-28 02:16:09,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:09,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952910841] [2024-11-28 02:16:09,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:16:09,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:09,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:09,573 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:09,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 02:16:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:09,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:16:09,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:16:09,930 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:16:10,491 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:10,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952910841] [2024-11-28 02:16:10,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952910841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:10,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:10,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2024-11-28 02:16:10,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888397563] [2024-11-28 02:16:10,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:10,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 02:16:10,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:10,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 02:16:10,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-11-28 02:16:10,493 INFO L87 Difference]: Start difference. First operand 121 states and 204 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 18 states have internal predecessors, (57), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:12,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:12,839 INFO L93 Difference]: Finished difference Result 250 states and 463 transitions. [2024-11-28 02:16:12,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 02:16:12,840 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 18 states have internal predecessors, (57), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2024-11-28 02:16:12,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:12,842 INFO L225 Difference]: With dead ends: 250 [2024-11-28 02:16:12,842 INFO L226 Difference]: Without dead ends: 229 [2024-11-28 02:16:12,844 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 02:16:12,844 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 146 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:12,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1056 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 02:16:12,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-28 02:16:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 124. [2024-11-28 02:16:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 103 states have (on average 1.3689320388349515) internal successors, (141), 105 states have internal predecessors, (141), 12 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (57), 15 states have call predecessors, (57), 11 states have call successors, (57) [2024-11-28 02:16:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2024-11-28 02:16:12,880 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 52 [2024-11-28 02:16:12,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:12,880 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2024-11-28 02:16:12,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 18 states have internal predecessors, (57), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2024-11-28 02:16:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 02:16:12,882 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:12,883 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:12,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 02:16:13,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:13,084 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:13,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:13,084 INFO L85 PathProgramCache]: Analyzing trace with hash 592944240, now seen corresponding path program 1 times [2024-11-28 02:16:13,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:13,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594945037] [2024-11-28 02:16:13,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:16:13,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:13,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:13,087 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:13,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 02:16:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:13,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 02:16:13,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:16:13,459 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:16:13,785 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:13,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594945037] [2024-11-28 02:16:13,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594945037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:13,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:13,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2024-11-28 02:16:13,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265805461] [2024-11-28 02:16:13,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:13,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 02:16:13,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:13,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 02:16:13,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-28 02:16:13,787 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:15,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:15,108 INFO L93 Difference]: Finished difference Result 294 states and 580 transitions. [2024-11-28 02:16:15,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 02:16:15,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2024-11-28 02:16:15,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:15,112 INFO L225 Difference]: With dead ends: 294 [2024-11-28 02:16:15,112 INFO L226 Difference]: Without dead ends: 229 [2024-11-28 02:16:15,113 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 02:16:15,115 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 123 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:15,115 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 852 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:16:15,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-28 02:16:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 150. [2024-11-28 02:16:15,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.3220338983050848) internal successors, (156), 122 states have internal predecessors, (156), 21 states have call successors, (21), 3 states have call predecessors, (21), 10 states have return successors, (134), 24 states have call predecessors, (134), 20 states have call successors, (134) [2024-11-28 02:16:15,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 311 transitions. [2024-11-28 02:16:15,160 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 311 transitions. Word has length 53 [2024-11-28 02:16:15,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:15,160 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 311 transitions. [2024-11-28 02:16:15,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:15,161 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 311 transitions. [2024-11-28 02:16:15,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 02:16:15,165 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:15,165 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:15,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 02:16:15,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:15,366 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:15,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash -996568140, now seen corresponding path program 2 times [2024-11-28 02:16:15,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:15,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531865119] [2024-11-28 02:16:15,367 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:16:15,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:15,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:15,373 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:15,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 02:16:15,434 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:16:15,434 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:15,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:16:15,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-28 02:16:15,467 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:16:15,467 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:15,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531865119] [2024-11-28 02:16:15,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531865119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:16:15,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:16:15,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:16:15,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207626502] [2024-11-28 02:16:15,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:16:15,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:16:15,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:15,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:16:15,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:16:15,468 INFO L87 Difference]: Start difference. First operand 150 states and 311 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:16:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:15,533 INFO L93 Difference]: Finished difference Result 170 states and 331 transitions. [2024-11-28 02:16:15,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:16:15,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2024-11-28 02:16:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:15,536 INFO L225 Difference]: With dead ends: 170 [2024-11-28 02:16:15,536 INFO L226 Difference]: Without dead ends: 158 [2024-11-28 02:16:15,536 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:16:15,537 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 1 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:15,537 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 225 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:16:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-28 02:16:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2024-11-28 02:16:15,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 125 states have (on average 1.28) internal successors, (160), 129 states have internal predecessors, (160), 21 states have call successors, (21), 3 states have call predecessors, (21), 10 states have return successors, (134), 24 states have call predecessors, (134), 20 states have call successors, (134) [2024-11-28 02:16:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 315 transitions. [2024-11-28 02:16:15,566 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 315 transitions. Word has length 53 [2024-11-28 02:16:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:15,566 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 315 transitions. [2024-11-28 02:16:15,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:16:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 315 transitions. [2024-11-28 02:16:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 02:16:15,570 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:15,570 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:15,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 02:16:15,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:15,771 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:15,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:15,771 INFO L85 PathProgramCache]: Analyzing trace with hash -276511137, now seen corresponding path program 2 times [2024-11-28 02:16:15,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:15,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801428959] [2024-11-28 02:16:15,771 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:16:15,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:15,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:15,773 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:15,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 02:16:15,843 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:16:15,843 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:15,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:16:15,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:16:16,053 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:16:16,436 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:16,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801428959] [2024-11-28 02:16:16,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801428959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:16,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:16,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-11-28 02:16:16,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387055915] [2024-11-28 02:16:16,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:16,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 02:16:16,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:16,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 02:16:16,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-28 02:16:16,438 INFO L87 Difference]: Start difference. First operand 157 states and 315 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:17,313 INFO L93 Difference]: Finished difference Result 266 states and 500 transitions. [2024-11-28 02:16:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:16:17,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2024-11-28 02:16:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:17,316 INFO L225 Difference]: With dead ends: 266 [2024-11-28 02:16:17,317 INFO L226 Difference]: Without dead ends: 251 [2024-11-28 02:16:17,318 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2024-11-28 02:16:17,318 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 64 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:17,319 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 719 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 02:16:17,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-28 02:16:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 151. [2024-11-28 02:16:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 122 states have (on average 1.2868852459016393) internal successors, (157), 126 states have internal predecessors, (157), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (113), 21 states have call predecessors, (113), 17 states have call successors, (113) [2024-11-28 02:16:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 288 transitions. [2024-11-28 02:16:17,350 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 288 transitions. Word has length 54 [2024-11-28 02:16:17,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:17,351 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 288 transitions. [2024-11-28 02:16:17,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:17,351 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 288 transitions. [2024-11-28 02:16:17,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 02:16:17,354 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:17,354 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:17,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 02:16:17,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:17,555 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:17,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:17,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1963662526, now seen corresponding path program 1 times [2024-11-28 02:16:17,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:17,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803367570] [2024-11-28 02:16:17,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:16:17,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:17,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:17,557 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:17,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 02:16:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:17,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:16:17,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:16:17,688 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:16:17,689 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:17,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803367570] [2024-11-28 02:16:17,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803367570] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:16:17,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:16:17,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:16:17,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850115317] [2024-11-28 02:16:17,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:16:17,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:16:17,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:17,690 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:16:17,690 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:16:17,690 INFO L87 Difference]: Start difference. First operand 151 states and 288 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:16:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:17,813 INFO L93 Difference]: Finished difference Result 269 states and 462 transitions. [2024-11-28 02:16:17,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:16:17,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-11-28 02:16:17,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:17,816 INFO L225 Difference]: With dead ends: 269 [2024-11-28 02:16:17,816 INFO L226 Difference]: Without dead ends: 158 [2024-11-28 02:16:17,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:16:17,818 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 12 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:17,819 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 152 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:16:17,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-28 02:16:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 155. [2024-11-28 02:16:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 125 states have (on average 1.28) internal successors, (160), 130 states have internal predecessors, (160), 18 states have call successors, (18), 3 states have call predecessors, (18), 11 states have return successors, (128), 21 states have call predecessors, (128), 17 states have call successors, (128) [2024-11-28 02:16:17,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 306 transitions. [2024-11-28 02:16:17,851 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 306 transitions. Word has length 54 [2024-11-28 02:16:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:17,852 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 306 transitions. [2024-11-28 02:16:17,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:16:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 306 transitions. [2024-11-28 02:16:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 02:16:17,855 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:17,855 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:17,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 02:16:18,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:18,055 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:18,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:18,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2754298, now seen corresponding path program 1 times [2024-11-28 02:16:18,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:18,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555091761] [2024-11-28 02:16:18,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:16:18,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:18,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:18,058 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:18,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 02:16:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:18,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:16:18,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:16:18,365 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:16:18,828 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:18,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555091761] [2024-11-28 02:16:18,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555091761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:18,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:18,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2024-11-28 02:16:18,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003409213] [2024-11-28 02:16:18,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:18,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:16:18,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:18,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:16:18,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:16:18,830 INFO L87 Difference]: Start difference. First operand 155 states and 306 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 18 states have internal predecessors, (56), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:20,647 INFO L93 Difference]: Finished difference Result 282 states and 583 transitions. [2024-11-28 02:16:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 02:16:20,648 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 18 states have internal predecessors, (56), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 55 [2024-11-28 02:16:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:20,650 INFO L225 Difference]: With dead ends: 282 [2024-11-28 02:16:20,650 INFO L226 Difference]: Without dead ends: 267 [2024-11-28 02:16:20,652 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 02:16:20,653 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 119 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:20,653 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 798 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 02:16:20,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-28 02:16:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 145. [2024-11-28 02:16:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 119 states have (on average 1.2941176470588236) internal successors, (154), 123 states have internal predecessors, (154), 15 states have call successors, (15), 3 states have call predecessors, (15), 10 states have return successors, (95), 18 states have call predecessors, (95), 14 states have call successors, (95) [2024-11-28 02:16:20,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 264 transitions. [2024-11-28 02:16:20,693 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 264 transitions. Word has length 55 [2024-11-28 02:16:20,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:20,693 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 264 transitions. [2024-11-28 02:16:20,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 18 states have internal predecessors, (56), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:20,694 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 264 transitions. [2024-11-28 02:16:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 02:16:20,696 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:20,696 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:20,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 02:16:20,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:20,897 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:20,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:20,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1137788974, now seen corresponding path program 1 times [2024-11-28 02:16:20,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:20,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765313685] [2024-11-28 02:16:20,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:16:20,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:20,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:20,899 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:20,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 02:16:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:20,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 02:16:20,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:16:21,024 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:16:21,024 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:21,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765313685] [2024-11-28 02:16:21,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765313685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:16:21,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:16:21,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:16:21,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386931965] [2024-11-28 02:16:21,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:16:21,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:16:21,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:21,026 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:16:21,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:16:21,026 INFO L87 Difference]: Start difference. First operand 145 states and 264 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:16:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:21,172 INFO L93 Difference]: Finished difference Result 266 states and 441 transitions. [2024-11-28 02:16:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:16:21,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-11-28 02:16:21,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:21,174 INFO L225 Difference]: With dead ends: 266 [2024-11-28 02:16:21,174 INFO L226 Difference]: Without dead ends: 155 [2024-11-28 02:16:21,175 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:16:21,176 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 17 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:21,177 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 197 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:16:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-28 02:16:21,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2024-11-28 02:16:21,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 119 states have (on average 1.2941176470588236) internal successors, (154), 123 states have internal predecessors, (154), 15 states have call successors, (15), 3 states have call predecessors, (15), 10 states have return successors, (95), 18 states have call predecessors, (95), 14 states have call successors, (95) [2024-11-28 02:16:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 264 transitions. [2024-11-28 02:16:21,203 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 264 transitions. Word has length 55 [2024-11-28 02:16:21,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:21,203 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 264 transitions. [2024-11-28 02:16:21,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:16:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 264 transitions. [2024-11-28 02:16:21,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 02:16:21,207 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:21,207 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:21,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 02:16:21,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:21,411 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:21,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:21,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1500294242, now seen corresponding path program 1 times [2024-11-28 02:16:21,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:21,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137252882] [2024-11-28 02:16:21,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:16:21,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:21,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:21,414 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:21,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 02:16:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:21,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:16:21,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:16:21,500 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:16:21,500 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:21,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137252882] [2024-11-28 02:16:21,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137252882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:16:21,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:16:21,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:16:21,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738450104] [2024-11-28 02:16:21,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:16:21,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:16:21,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:21,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:16:21,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:16:21,501 INFO L87 Difference]: Start difference. First operand 145 states and 264 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:16:21,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:21,586 INFO L93 Difference]: Finished difference Result 276 states and 448 transitions. [2024-11-28 02:16:21,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:16:21,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-11-28 02:16:21,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:21,588 INFO L225 Difference]: With dead ends: 276 [2024-11-28 02:16:21,589 INFO L226 Difference]: Without dead ends: 144 [2024-11-28 02:16:21,590 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:16:21,590 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:21,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 143 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:16:21,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-28 02:16:21,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 115. [2024-11-28 02:16:21,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 98 states have (on average 1.2857142857142858) internal successors, (126), 99 states have internal predecessors, (126), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (30), 12 states have call predecessors, (30), 8 states have call successors, (30) [2024-11-28 02:16:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 165 transitions. [2024-11-28 02:16:21,611 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 165 transitions. Word has length 56 [2024-11-28 02:16:21,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:21,612 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 165 transitions. [2024-11-28 02:16:21,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:16:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 165 transitions. [2024-11-28 02:16:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 02:16:21,613 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:21,613 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:21,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 02:16:21,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:21,814 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:21,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:21,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2080756412, now seen corresponding path program 2 times [2024-11-28 02:16:21,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:21,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26172555] [2024-11-28 02:16:21,814 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:16:21,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:21,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:21,819 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:21,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 02:16:21,891 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:16:21,891 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:21,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:16:21,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:22,018 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:16:22,363 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:22,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26172555] [2024-11-28 02:16:22,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26172555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:22,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:22,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-28 02:16:22,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19047462] [2024-11-28 02:16:22,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:22,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:16:22,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:22,364 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:16:22,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:16:22,365 INFO L87 Difference]: Start difference. First operand 115 states and 165 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:16:23,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:23,010 INFO L93 Difference]: Finished difference Result 241 states and 342 transitions. [2024-11-28 02:16:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 02:16:23,010 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 56 [2024-11-28 02:16:23,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:23,012 INFO L225 Difference]: With dead ends: 241 [2024-11-28 02:16:23,012 INFO L226 Difference]: Without dead ends: 144 [2024-11-28 02:16:23,012 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2024-11-28 02:16:23,013 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 44 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:23,013 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 510 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:16:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-28 02:16:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 124. [2024-11-28 02:16:23,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 107 states have (on average 1.3457943925233644) internal successors, (144), 108 states have internal predecessors, (144), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (30), 12 states have call predecessors, (30), 8 states have call successors, (30) [2024-11-28 02:16:23,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 183 transitions. [2024-11-28 02:16:23,030 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 183 transitions. Word has length 56 [2024-11-28 02:16:23,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:23,030 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 183 transitions. [2024-11-28 02:16:23,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:16:23,031 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 183 transitions. [2024-11-28 02:16:23,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 02:16:23,032 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:23,032 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:23,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 02:16:23,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:23,233 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:23,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:23,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2135613771, now seen corresponding path program 1 times [2024-11-28 02:16:23,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:23,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453270936] [2024-11-28 02:16:23,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:16:23,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:23,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:23,237 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:23,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 02:16:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:23,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:16:23,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:16:23,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:16:23,658 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:23,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453270936] [2024-11-28 02:16:23,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453270936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:23,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:23,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-28 02:16:23,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719486348] [2024-11-28 02:16:23,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:23,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:16:23,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:23,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:16:23,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:16:23,660 INFO L87 Difference]: Start difference. First operand 124 states and 183 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:16:24,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:24,058 INFO L93 Difference]: Finished difference Result 241 states and 335 transitions. [2024-11-28 02:16:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:16:24,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2024-11-28 02:16:24,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:24,060 INFO L225 Difference]: With dead ends: 241 [2024-11-28 02:16:24,060 INFO L226 Difference]: Without dead ends: 139 [2024-11-28 02:16:24,061 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:16:24,061 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 81 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:24,062 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 386 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:16:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-11-28 02:16:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2024-11-28 02:16:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 96 states have (on average 1.375) internal successors, (132), 98 states have internal predecessors, (132), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-28 02:16:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2024-11-28 02:16:24,075 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 57 [2024-11-28 02:16:24,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:24,076 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2024-11-28 02:16:24,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:16:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2024-11-28 02:16:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-28 02:16:24,077 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:24,077 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:24,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-28 02:16:24,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:24,278 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:24,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:24,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2076490328, now seen corresponding path program 2 times [2024-11-28 02:16:24,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:24,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893861588] [2024-11-28 02:16:24,279 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:16:24,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:24,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:24,281 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:24,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 02:16:24,351 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:16:24,351 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:24,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 02:16:24,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:16:24,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:16:25,743 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:25,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893861588] [2024-11-28 02:16:25,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893861588] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:25,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:25,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2024-11-28 02:16:25,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032187615] [2024-11-28 02:16:25,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:25,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 02:16:25,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:25,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 02:16:25,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2024-11-28 02:16:25,745 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 26 states have internal predecessors, (73), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:30,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:30,251 INFO L93 Difference]: Finished difference Result 279 states and 476 transitions. [2024-11-28 02:16:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-28 02:16:30,252 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 26 states have internal predecessors, (73), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2024-11-28 02:16:30,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:30,254 INFO L225 Difference]: With dead ends: 279 [2024-11-28 02:16:30,254 INFO L226 Difference]: Without dead ends: 258 [2024-11-28 02:16:30,256 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1007, Invalid=5155, Unknown=0, NotChecked=0, Total=6162 [2024-11-28 02:16:30,256 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 352 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:30,257 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1058 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 02:16:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-11-28 02:16:30,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 126. [2024-11-28 02:16:30,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 109 states have (on average 1.3944954128440368) internal successors, (152), 112 states have internal predecessors, (152), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2024-11-28 02:16:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 191 transitions. [2024-11-28 02:16:30,277 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 191 transitions. Word has length 60 [2024-11-28 02:16:30,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:30,277 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 191 transitions. [2024-11-28 02:16:30,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 26 states have internal predecessors, (73), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 191 transitions. [2024-11-28 02:16:30,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 02:16:30,279 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:30,279 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:30,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 02:16:30,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:30,480 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:30,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1469884922, now seen corresponding path program 2 times [2024-11-28 02:16:30,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:30,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953463655] [2024-11-28 02:16:30,481 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:16:30,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:30,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:30,483 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:30,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 02:16:30,565 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:16:30,565 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:30,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 02:16:30,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:16:30,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:16:31,726 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:31,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953463655] [2024-11-28 02:16:31,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953463655] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:31,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:31,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2024-11-28 02:16:31,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492871341] [2024-11-28 02:16:31,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:31,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 02:16:31,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:31,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 02:16:31,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:16:31,727 INFO L87 Difference]: Start difference. First operand 126 states and 191 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 26 states have internal predecessors, (72), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:34,729 INFO L93 Difference]: Finished difference Result 273 states and 406 transitions. [2024-11-28 02:16:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-28 02:16:34,730 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 26 states have internal predecessors, (72), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2024-11-28 02:16:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:34,731 INFO L225 Difference]: With dead ends: 273 [2024-11-28 02:16:34,731 INFO L226 Difference]: Without dead ends: 258 [2024-11-28 02:16:34,733 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=473, Invalid=1977, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 02:16:34,734 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 305 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:34,734 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 1190 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 02:16:34,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-11-28 02:16:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 131. [2024-11-28 02:16:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 114 states have (on average 1.3859649122807018) internal successors, (158), 115 states have internal predecessors, (158), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (30), 12 states have call predecessors, (30), 8 states have call successors, (30) [2024-11-28 02:16:34,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 197 transitions. [2024-11-28 02:16:34,756 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 197 transitions. Word has length 63 [2024-11-28 02:16:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:34,756 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 197 transitions. [2024-11-28 02:16:34,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 26 states have internal predecessors, (72), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 197 transitions. [2024-11-28 02:16:34,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-28 02:16:34,758 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:34,758 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:34,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 02:16:34,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:34,958 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:34,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:34,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2696511, now seen corresponding path program 2 times [2024-11-28 02:16:34,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:34,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298357219] [2024-11-28 02:16:34,959 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:16:34,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:34,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:34,961 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:34,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 02:16:35,038 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:16:35,039 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:35,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:16:35,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:16:35,390 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:16:36,126 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:36,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298357219] [2024-11-28 02:16:36,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298357219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:36,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:36,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2024-11-28 02:16:36,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678178655] [2024-11-28 02:16:36,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:36,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 02:16:36,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:36,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 02:16:36,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2024-11-28 02:16:36,128 INFO L87 Difference]: Start difference. First operand 131 states and 197 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:16:37,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:37,409 INFO L93 Difference]: Finished difference Result 280 states and 398 transitions. [2024-11-28 02:16:37,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 02:16:37,410 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2024-11-28 02:16:37,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:37,411 INFO L225 Difference]: With dead ends: 280 [2024-11-28 02:16:37,411 INFO L226 Difference]: Without dead ends: 171 [2024-11-28 02:16:37,412 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=623, Invalid=1269, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 02:16:37,417 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 260 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:37,418 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 719 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:16:37,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-28 02:16:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 116. [2024-11-28 02:16:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 103 states have (on average 1.4174757281553398) internal successors, (146), 105 states have internal predecessors, (146), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-28 02:16:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 168 transitions. [2024-11-28 02:16:37,443 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 168 transitions. Word has length 65 [2024-11-28 02:16:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:37,443 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 168 transitions. [2024-11-28 02:16:37,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:16:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 168 transitions. [2024-11-28 02:16:37,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-28 02:16:37,444 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:37,445 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:37,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 02:16:37,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:37,646 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:37,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:37,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1819964694, now seen corresponding path program 3 times [2024-11-28 02:16:37,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:37,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713853858] [2024-11-28 02:16:37,647 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:16:37,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:37,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:37,649 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:37,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 02:16:37,746 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-28 02:16:37,746 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:37,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:16:37,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:16:38,076 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:16:39,160 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:39,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713853858] [2024-11-28 02:16:39,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713853858] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:39,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:39,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2024-11-28 02:16:39,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143560812] [2024-11-28 02:16:39,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:39,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 02:16:39,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:39,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 02:16:39,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2024-11-28 02:16:39,163 INFO L87 Difference]: Start difference. First operand 116 states and 168 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:16:41,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:41,674 INFO L93 Difference]: Finished difference Result 274 states and 398 transitions. [2024-11-28 02:16:41,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 02:16:41,675 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2024-11-28 02:16:41,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:41,676 INFO L225 Difference]: With dead ends: 274 [2024-11-28 02:16:41,676 INFO L226 Difference]: Without dead ends: 165 [2024-11-28 02:16:41,677 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=453, Invalid=807, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 02:16:41,677 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 143 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:41,678 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 905 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 02:16:41,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-28 02:16:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 133. [2024-11-28 02:16:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 120 states have (on average 1.5) internal successors, (180), 122 states have internal predecessors, (180), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-28 02:16:41,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 202 transitions. [2024-11-28 02:16:41,703 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 202 transitions. Word has length 68 [2024-11-28 02:16:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:41,704 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 202 transitions. [2024-11-28 02:16:41,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:16:41,704 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 202 transitions. [2024-11-28 02:16:41,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-28 02:16:41,705 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:41,705 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:41,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 02:16:41,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:41,906 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:41,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:41,907 INFO L85 PathProgramCache]: Analyzing trace with hash 914585408, now seen corresponding path program 3 times [2024-11-28 02:16:41,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:41,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082701473] [2024-11-28 02:16:41,907 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:16:41,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:41,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:41,909 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:41,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 02:16:42,018 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-28 02:16:42,018 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:42,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 02:16:42,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 4 proven. 191 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:16:42,728 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 4 proven. 191 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:16:44,712 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:44,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082701473] [2024-11-28 02:16:44,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082701473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:44,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:44,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2024-11-28 02:16:44,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153765846] [2024-11-28 02:16:44,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:44,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 02:16:44,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:44,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 02:16:44,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1546, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 02:16:44,715 INFO L87 Difference]: Start difference. First operand 133 states and 202 transitions. Second operand has 44 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 42 states have internal predecessors, (102), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:54,000 INFO L93 Difference]: Finished difference Result 378 states and 699 transitions. [2024-11-28 02:16:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-28 02:16:54,000 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 42 states have internal predecessors, (102), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2024-11-28 02:16:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:54,003 INFO L225 Difference]: With dead ends: 378 [2024-11-28 02:16:54,003 INFO L226 Difference]: Without dead ends: 357 [2024-11-28 02:16:54,006 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1582, Invalid=5224, Unknown=0, NotChecked=0, Total=6806 [2024-11-28 02:16:54,006 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 698 mSDsluCounter, 2125 mSDsCounter, 0 mSdLazyCounter, 3088 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:54,007 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 2233 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3088 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-28 02:16:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2024-11-28 02:16:54,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 163. [2024-11-28 02:16:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 146 states have (on average 1.5205479452054795) internal successors, (222), 147 states have internal predecessors, (222), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (30), 12 states have call predecessors, (30), 8 states have call successors, (30) [2024-11-28 02:16:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 261 transitions. [2024-11-28 02:16:54,047 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 261 transitions. Word has length 76 [2024-11-28 02:16:54,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:54,048 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 261 transitions. [2024-11-28 02:16:54,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 42 states have internal predecessors, (102), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:16:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 261 transitions. [2024-11-28 02:16:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-28 02:16:54,049 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:54,049 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:54,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 02:16:54,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:54,250 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:54,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:54,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1496191271, now seen corresponding path program 3 times [2024-11-28 02:16:54,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:54,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270592726] [2024-11-28 02:16:54,251 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:16:54,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:54,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:54,253 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:54,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 02:16:54,326 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:16:54,326 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:54,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:16:54,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2024-11-28 02:16:54,413 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:54,526 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:54,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270592726] [2024-11-28 02:16:54,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270592726] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:16:54,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1845199714] [2024-11-28 02:16:54,526 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:16:54,526 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 02:16:54,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 02:16:54,538 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 02:16:54,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2024-11-28 02:16:54,656 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:16:54,656 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:16:54,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:16:54,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2024-11-28 02:16:54,700 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:54,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1845199714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:16:54,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:54,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-28 02:16:54,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676426227] [2024-11-28 02:16:54,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:54,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 02:16:54,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:54,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 02:16:54,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:16:54,728 INFO L87 Difference]: Start difference. First operand 163 states and 261 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:16:55,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:16:55,211 INFO L93 Difference]: Finished difference Result 188 states and 285 transitions. [2024-11-28 02:16:55,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:16:55,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 81 [2024-11-28 02:16:55,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:16:55,213 INFO L225 Difference]: With dead ends: 188 [2024-11-28 02:16:55,213 INFO L226 Difference]: Without dead ends: 176 [2024-11-28 02:16:55,213 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:16:55,214 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 25 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:16:55,214 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 445 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:16:55,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-28 02:16:55,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 163. [2024-11-28 02:16:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 146 states have (on average 1.5136986301369864) internal successors, (221), 147 states have internal predecessors, (221), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (30), 12 states have call predecessors, (30), 8 states have call successors, (30) [2024-11-28 02:16:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 260 transitions. [2024-11-28 02:16:55,248 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 260 transitions. Word has length 81 [2024-11-28 02:16:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:16:55,248 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 260 transitions. [2024-11-28 02:16:55,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:16:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 260 transitions. [2024-11-28 02:16:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-28 02:16:55,249 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:16:55,249 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:16:55,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2024-11-28 02:16:55,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-28 02:16:55,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:55,650 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:16:55,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:16:55,651 INFO L85 PathProgramCache]: Analyzing trace with hash 553169043, now seen corresponding path program 1 times [2024-11-28 02:16:55,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:16:55,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743724170] [2024-11-28 02:16:55,651 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:16:55,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:16:55,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:16:55,653 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:16:55,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 02:16:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:16:55,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 02:16:55,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:16:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 28 proven. 182 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 02:16:56,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:16:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 4 proven. 194 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:16:58,840 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:16:58,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743724170] [2024-11-28 02:16:58,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743724170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:16:58,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:16:58,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2024-11-28 02:16:58,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865849431] [2024-11-28 02:16:58,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:16:58,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-28 02:16:58,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:16:58,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-28 02:16:58,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=1629, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 02:16:58,842 INFO L87 Difference]: Start difference. First operand 163 states and 260 transitions. Second operand has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:17:04,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:17:04,630 INFO L93 Difference]: Finished difference Result 401 states and 601 transitions. [2024-11-28 02:17:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-28 02:17:04,631 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2024-11-28 02:17:04,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:17:04,632 INFO L225 Difference]: With dead ends: 401 [2024-11-28 02:17:04,632 INFO L226 Difference]: Without dead ends: 260 [2024-11-28 02:17:04,633 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1954, Invalid=4366, Unknown=0, NotChecked=0, Total=6320 [2024-11-28 02:17:04,634 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 937 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 1870 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:17:04,634 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 1870 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2004 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-28 02:17:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-28 02:17:04,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 148. [2024-11-28 02:17:04,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 135 states have (on average 1.548148148148148) internal successors, (209), 137 states have internal predecessors, (209), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-28 02:17:04,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 231 transitions. [2024-11-28 02:17:04,681 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 231 transitions. Word has length 81 [2024-11-28 02:17:04,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:17:04,681 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 231 transitions. [2024-11-28 02:17:04,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:17:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 231 transitions. [2024-11-28 02:17:04,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-28 02:17:04,682 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:17:04,682 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:17:04,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 02:17:04,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:17:04,886 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:17:04,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:17:04,887 INFO L85 PathProgramCache]: Analyzing trace with hash 792853574, now seen corresponding path program 4 times [2024-11-28 02:17:04,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:17:04,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82446473] [2024-11-28 02:17:04,887 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:17:04,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:17:04,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:17:04,890 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:17:04,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 02:17:04,998 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:17:04,998 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:17:05,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 02:17:05,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:17:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 25 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:17:06,023 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:17:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 4 proven. 493 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 02:17:10,141 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:17:10,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82446473] [2024-11-28 02:17:10,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82446473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:17:10,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:17:10,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2024-11-28 02:17:10,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866957519] [2024-11-28 02:17:10,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:17:10,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-28 02:17:10,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:17:10,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-28 02:17:10,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 02:17:10,143 INFO L87 Difference]: Start difference. First operand 148 states and 231 transitions. Second operand has 50 states, 50 states have (on average 2.68) internal successors, (134), 50 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:17:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:17:23,560 INFO L93 Difference]: Finished difference Result 378 states and 580 transitions. [2024-11-28 02:17:23,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-28 02:17:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.68) internal successors, (134), 50 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 92 [2024-11-28 02:17:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:17:23,562 INFO L225 Difference]: With dead ends: 378 [2024-11-28 02:17:23,562 INFO L226 Difference]: Without dead ends: 237 [2024-11-28 02:17:23,563 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1773, Invalid=3339, Unknown=0, NotChecked=0, Total=5112 [2024-11-28 02:17:23,564 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 597 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 2122 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 2178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:17:23,564 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 2433 Invalid, 2178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2122 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-28 02:17:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-28 02:17:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 181. [2024-11-28 02:17:23,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 168 states have (on average 1.6369047619047619) internal successors, (275), 170 states have internal predecessors, (275), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-28 02:17:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 297 transitions. [2024-11-28 02:17:23,612 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 297 transitions. Word has length 92 [2024-11-28 02:17:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:17:23,613 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 297 transitions. [2024-11-28 02:17:23,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.68) internal successors, (134), 50 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 02:17:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 297 transitions. [2024-11-28 02:17:23,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-28 02:17:23,614 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:17:23,614 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:17:23,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-28 02:17:23,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:17:23,819 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:17:23,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:17:23,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2052919010, now seen corresponding path program 4 times [2024-11-28 02:17:23,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:17:23,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953425325] [2024-11-28 02:17:23,820 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:17:23,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:17:23,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:17:23,822 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:17:23,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 02:17:23,922 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:17:23,922 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:17:23,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 02:17:23,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:17:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 10 proven. 561 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:17:25,715 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:17:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 10 proven. 561 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:17:30,433 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:17:30,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953425325] [2024-11-28 02:17:30,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953425325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:17:30,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:17:30,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 66 [2024-11-28 02:17:30,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979592874] [2024-11-28 02:17:30,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:17:30,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-28 02:17:30,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:17:30,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-28 02:17:30,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=3524, Unknown=0, NotChecked=0, Total=4290 [2024-11-28 02:17:30,436 INFO L87 Difference]: Start difference. First operand 181 states and 297 transitions. Second operand has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 62 states have internal predecessors, (145), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:17:36,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:17:38,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:17:52,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:18:05,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:18:05,969 INFO L93 Difference]: Finished difference Result 425 states and 677 transitions. [2024-11-28 02:18:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-28 02:18:05,970 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 62 states have internal predecessors, (145), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 96 [2024-11-28 02:18:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:18:05,973 INFO L225 Difference]: With dead ends: 425 [2024-11-28 02:18:05,973 INFO L226 Difference]: Without dead ends: 404 [2024-11-28 02:18:05,976 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=3669, Invalid=10373, Unknown=0, NotChecked=0, Total=14042 [2024-11-28 02:18:05,976 INFO L435 NwaCegarLoop]: 110 mSDtfsCounter, 1428 mSDsluCounter, 3736 mSDsCounter, 0 mSdLazyCounter, 3684 mSolverCounterSat, 1133 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 3846 SdHoareTripleChecker+Invalid, 4819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1133 IncrementalHoareTripleChecker+Valid, 3684 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:18:05,977 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1432 Valid, 3846 Invalid, 4819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1133 Valid, 3684 Invalid, 2 Unknown, 0 Unchecked, 17.0s Time] [2024-11-28 02:18:05,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-11-28 02:18:06,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 198. [2024-11-28 02:18:06,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 181 states have (on average 1.6298342541436464) internal successors, (295), 184 states have internal predecessors, (295), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2024-11-28 02:18:06,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 334 transitions. [2024-11-28 02:18:06,051 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 334 transitions. Word has length 96 [2024-11-28 02:18:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:18:06,052 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 334 transitions. [2024-11-28 02:18:06,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 62 states have internal predecessors, (145), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:18:06,052 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 334 transitions. [2024-11-28 02:18:06,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-28 02:18:06,052 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:18:06,053 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:18:06,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-28 02:18:06,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:18:06,253 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:18:06,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:18:06,254 INFO L85 PathProgramCache]: Analyzing trace with hash 691617084, now seen corresponding path program 3 times [2024-11-28 02:18:06,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:18:06,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099739748] [2024-11-28 02:18:06,254 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:18:06,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:18:06,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:18:06,256 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:18:06,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 02:18:06,431 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2024-11-28 02:18:06,431 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:18:06,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 02:18:06,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:18:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 4 proven. 563 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:18:08,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:18:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 4 proven. 563 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 02:18:12,253 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:18:12,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099739748] [2024-11-28 02:18:12,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099739748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:18:12,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:18:12,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2024-11-28 02:18:12,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937543234] [2024-11-28 02:18:12,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:18:12,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-28 02:18:12,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:18:12,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-28 02:18:12,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3269, Unknown=0, NotChecked=0, Total=4032 [2024-11-28 02:18:12,256 INFO L87 Difference]: Start difference. First operand 198 states and 334 transitions. Second operand has 64 states, 64 states have (on average 2.25) internal successors, (144), 62 states have internal predecessors, (144), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:18:18,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:18:23,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:18:27,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.91s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:18:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:18:47,996 INFO L93 Difference]: Finished difference Result 419 states and 655 transitions. [2024-11-28 02:18:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-28 02:18:47,997 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.25) internal successors, (144), 62 states have internal predecessors, (144), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 99 [2024-11-28 02:18:47,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:18:48,000 INFO L225 Difference]: With dead ends: 419 [2024-11-28 02:18:48,000 INFO L226 Difference]: Without dead ends: 404 [2024-11-28 02:18:48,002 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1792 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=3522, Invalid=9818, Unknown=0, NotChecked=0, Total=13340 [2024-11-28 02:18:48,003 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 1437 mSDsluCounter, 3667 mSDsCounter, 0 mSdLazyCounter, 3773 mSolverCounterSat, 1081 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 3778 SdHoareTripleChecker+Invalid, 4855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1081 IncrementalHoareTripleChecker+Valid, 3773 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:18:48,003 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1437 Valid, 3778 Invalid, 4855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1081 Valid, 3773 Invalid, 1 Unknown, 0 Unchecked, 16.8s Time] [2024-11-28 02:18:48,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-11-28 02:18:48,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 203. [2024-11-28 02:18:48,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 186 states have (on average 1.618279569892473) internal successors, (301), 187 states have internal predecessors, (301), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (30), 12 states have call predecessors, (30), 8 states have call successors, (30) [2024-11-28 02:18:48,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 340 transitions. [2024-11-28 02:18:48,090 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 340 transitions. Word has length 99 [2024-11-28 02:18:48,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:18:48,091 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 340 transitions. [2024-11-28 02:18:48,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.25) internal successors, (144), 62 states have internal predecessors, (144), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:18:48,091 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 340 transitions. [2024-11-28 02:18:48,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-28 02:18:48,092 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:18:48,092 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:18:48,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 02:18:48,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:18:48,293 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:18:48,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:18:48,293 INFO L85 PathProgramCache]: Analyzing trace with hash 485920305, now seen corresponding path program 2 times [2024-11-28 02:18:48,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:18:48,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903587855] [2024-11-28 02:18:48,294 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:18:48,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:18:48,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:18:48,296 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:18:48,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 02:18:48,397 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:18:48,397 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:18:48,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 02:18:48,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:18:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 4 proven. 564 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:18:51,356 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:18:52,924 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:18:52,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903587855] [2024-11-28 02:18:52,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903587855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:18:52,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1278175985] [2024-11-28 02:18:52,924 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:18:52,924 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 02:18:52,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 02:18:52,926 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 02:18:52,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2024-11-28 02:18:53,154 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:18:53,154 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:18:53,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-28 02:18:53,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:18:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 4 proven. 564 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:18:59,463 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:19:00,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1278175985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:19:00,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:19:00,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35] total 71 [2024-11-28 02:19:00,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093486698] [2024-11-28 02:19:00,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:19:00,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-28 02:19:00,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:19:00,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-28 02:19:00,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=6062, Unknown=0, NotChecked=0, Total=6320 [2024-11-28 02:19:00,979 INFO L87 Difference]: Start difference. First operand 203 states and 340 transitions. Second operand has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 69 states have internal predecessors, (146), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:19:17,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.93s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:19:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:19:18,301 INFO L93 Difference]: Finished difference Result 292 states and 460 transitions. [2024-11-28 02:19:18,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 02:19:18,302 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 69 states have internal predecessors, (146), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 101 [2024-11-28 02:19:18,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:19:18,305 INFO L225 Difference]: With dead ends: 292 [2024-11-28 02:19:18,305 INFO L226 Difference]: Without dead ends: 277 [2024-11-28 02:19:18,306 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=322, Invalid=7868, Unknown=0, NotChecked=0, Total=8190 [2024-11-28 02:19:18,306 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 91 mSDsluCounter, 1777 mSDsCounter, 0 mSdLazyCounter, 7754 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 7755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:19:18,306 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1819 Invalid, 7755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7754 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time] [2024-11-28 02:19:18,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-11-28 02:19:18,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 216. [2024-11-28 02:19:18,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 196 states have (on average 1.596938775510204) internal successors, (313), 197 states have internal predecessors, (313), 11 states have call successors, (11), 3 states have call predecessors, (11), 8 states have return successors, (46), 15 states have call predecessors, (46), 10 states have call successors, (46) [2024-11-28 02:19:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 370 transitions. [2024-11-28 02:19:18,388 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 370 transitions. Word has length 101 [2024-11-28 02:19:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:19:18,388 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 370 transitions. [2024-11-28 02:19:18,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 69 states have internal predecessors, (146), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:19:18,388 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 370 transitions. [2024-11-28 02:19:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-28 02:19:18,389 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:19:18,389 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:19:18,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 02:19:18,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2024-11-28 02:19:18,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 02:19:18,790 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:19:18,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:19:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash -475132213, now seen corresponding path program 1 times [2024-11-28 02:19:18,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:19:18,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803400983] [2024-11-28 02:19:18,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:19:18,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:19:18,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:19:18,793 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:19:18,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 02:19:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:19:18,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 02:19:18,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:19:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 4 proven. 564 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:19:22,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:19:23,622 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:19:23,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803400983] [2024-11-28 02:19:23,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803400983] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:19:23,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1949245708] [2024-11-28 02:19:23,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:19:23,622 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 02:19:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 02:19:23,624 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 02:19:23,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2024-11-28 02:19:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:19:23,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-28 02:19:23,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:19:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 4 proven. 564 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:19:31,890 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:19:32,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1949245708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:19:32,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:19:32,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2024-11-28 02:19:32,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196229639] [2024-11-28 02:19:32,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:19:32,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-28 02:19:32,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:19:32,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-28 02:19:32,154 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5190, Unknown=0, NotChecked=0, Total=5402 [2024-11-28 02:19:32,154 INFO L87 Difference]: Start difference. First operand 216 states and 370 transitions. Second operand has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 67 states have internal predecessors, (147), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:19:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:19:51,908 INFO L93 Difference]: Finished difference Result 289 states and 455 transitions. [2024-11-28 02:19:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-28 02:19:51,909 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 67 states have internal predecessors, (147), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 102 [2024-11-28 02:19:51,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:19:51,911 INFO L225 Difference]: With dead ends: 289 [2024-11-28 02:19:51,911 INFO L226 Difference]: Without dead ends: 275 [2024-11-28 02:19:51,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=253, Invalid=6719, Unknown=0, NotChecked=0, Total=6972 [2024-11-28 02:19:51,913 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 66 mSDsluCounter, 2545 mSDsCounter, 0 mSdLazyCounter, 9186 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 2595 SdHoareTripleChecker+Invalid, 9186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:19:51,914 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 2595 Invalid, 9186 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 9186 Invalid, 0 Unknown, 0 Unchecked, 18.1s Time] [2024-11-28 02:19:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-11-28 02:19:51,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 218. [2024-11-28 02:19:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 198 states have (on average 1.5909090909090908) internal successors, (315), 199 states have internal predecessors, (315), 11 states have call successors, (11), 3 states have call predecessors, (11), 8 states have return successors, (46), 15 states have call predecessors, (46), 10 states have call successors, (46) [2024-11-28 02:19:51,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 372 transitions. [2024-11-28 02:19:51,988 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 372 transitions. Word has length 102 [2024-11-28 02:19:51,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:19:51,989 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 372 transitions. [2024-11-28 02:19:51,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 67 states have internal predecessors, (147), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:19:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 372 transitions. [2024-11-28 02:19:51,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-28 02:19:51,989 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:19:51,989 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:19:51,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2024-11-28 02:19:52,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-28 02:19:52,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:19:52,390 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:19:52,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:19:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1496200567, now seen corresponding path program 1 times [2024-11-28 02:19:52,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:19:52,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780504007] [2024-11-28 02:19:52,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:19:52,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:19:52,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:19:52,393 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:19:52,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 02:19:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:19:52,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 02:19:52,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:19:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 4 proven. 564 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:19:57,087 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:19:58,966 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:19:58,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780504007] [2024-11-28 02:19:58,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780504007] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:19:58,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [862245096] [2024-11-28 02:19:58,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:19:58,966 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 02:19:58,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 02:19:58,968 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 02:19:58,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2024-11-28 02:19:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:19:59,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-28 02:19:59,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:20:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 4 proven. 564 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 02:20:08,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:20:08,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [862245096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:20:08,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:20:08,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 35] total 72 [2024-11-28 02:20:08,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287553262] [2024-11-28 02:20:08,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:20:08,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-28 02:20:08,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:20:08,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-28 02:20:08,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=5772, Unknown=0, NotChecked=0, Total=6006 [2024-11-28 02:20:08,734 INFO L87 Difference]: Start difference. First operand 218 states and 372 transitions. Second operand has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 70 states have internal predecessors, (147), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:20:28,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:20:29,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:20:29,747 INFO L93 Difference]: Finished difference Result 290 states and 455 transitions. [2024-11-28 02:20:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 02:20:29,748 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 70 states have internal predecessors, (147), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 102 [2024-11-28 02:20:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:20:29,750 INFO L225 Difference]: With dead ends: 290 [2024-11-28 02:20:29,750 INFO L226 Difference]: Without dead ends: 276 [2024-11-28 02:20:29,750 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=293, Invalid=7897, Unknown=0, NotChecked=0, Total=8190 [2024-11-28 02:20:29,751 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 75 mSDsluCounter, 2611 mSDsCounter, 0 mSdLazyCounter, 8487 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 8487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:20:29,751 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 2666 Invalid, 8487 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 8487 Invalid, 0 Unknown, 0 Unchecked, 19.1s Time] [2024-11-28 02:20:29,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-28 02:20:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 216. [2024-11-28 02:20:29,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 196 states have (on average 1.5918367346938775) internal successors, (312), 197 states have internal predecessors, (312), 11 states have call successors, (11), 3 states have call predecessors, (11), 8 states have return successors, (46), 15 states have call predecessors, (46), 10 states have call successors, (46) [2024-11-28 02:20:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 369 transitions. [2024-11-28 02:20:29,839 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 369 transitions. Word has length 102 [2024-11-28 02:20:29,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:20:29,839 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 369 transitions. [2024-11-28 02:20:29,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 70 states have internal predecessors, (147), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:20:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 369 transitions. [2024-11-28 02:20:29,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-28 02:20:29,840 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:20:29,840 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:20:29,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2024-11-28 02:20:30,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 02:20:30,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:20:30,241 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:20:30,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:20:30,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1164656915, now seen corresponding path program 1 times [2024-11-28 02:20:30,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:20:30,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077739910] [2024-11-28 02:20:30,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:20:30,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:20:30,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:20:30,244 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:20:30,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eab45eaa-f301-4875-a7d5-3d81373de590/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 02:20:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:20:30,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-28 02:20:30,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:20:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 7 proven. 566 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 02:20:48,381 INFO L312 TraceCheckSpWp]: Computing backward predicates...